poolifier - npm Package Compare versions

Comparing version 2.6.31 to 2.6.32

./lib/index.js

@@ -1,1 +0,1 @@
-"use strict";var e=require("node:events"),t=require("node:worker_threads"),s=require("node:cluster"),r=require("node:crypto"),i=require("node:perf_hooks"),o=require("node:fs"),n=require("node:os"),a=require("node:async_hooks");function h(e){var t=Object.create(null);return e&&Object.keys(e).forEach((function(s){if("default"!==s){var r=Object.getOwnPropertyDescriptor(e,s);Object.defineProperty(t,s,r.get?r:{enumerable:!0,get:function(){return e[s]}})}})),t.default=e,Object.freeze(t)}var u=h(n);const k=Object.freeze({fixed:"fixed",dynamic:"dynamic"});class c extends e.EventEmitter{}const d=Object.freeze({ready:"ready",busy:"busy",full:"full",destroy:"destroy",error:"error",taskError:"taskError",backPressure:"backPressure"}),l="default",g=Object.freeze((()=>{})),m={choiceRetries:6,runTime:{median:!1},waitTime:{median:!1},elu:{median:!1}},p={aggregate:!1,average:!1,median:!1},w=e=>{if(Array.isArray(e)&&0===e.length)return 0;if(Array.isArray(e)&&1===e.length)return e[0];const t=e.slice().sort(((e,t)=>e-t));return(t[t.length-1>>1]+t[t.length>>1])/2},y=(e,t=2)=>{const s=Math.pow(10,t);return Math.round(e*s*(1+Number.EPSILON))/s},f=e=>"object"==typeof e&&null!==e&&e?.constructor===Object&&"[object Object]"===Object.prototype.toString.call(e),T=(e,t)=>t===e,W=e=>"function"==typeof e&&"AsyncFunction"===e.constructor.name,N=(e,t,s,r)=>{t.aggregate&&(e.aggregate=(e.aggregate??0)+s,e.minimum=Math.min(s,e.minimum??1/0),e.maximum=Math.max(s,e.maximum??-1/0),t.average&&0!==r&&(e.average=e.aggregate/r),t.median&&null!=s&&(e.history.push(s),e.median=w(e.history)))},x=Object.freeze({SOFT:"SOFT",HARD:"HARD"}),S=Object.freeze({ROUND_ROBIN:"ROUND_ROBIN",LEAST_USED:"LEAST_USED",LEAST_BUSY:"LEAST_BUSY",LEAST_ELU:"LEAST_ELU",FAIR_SHARE:"FAIR_SHARE",WEIGHTED_ROUND_ROBIN:"WEIGHTED_ROUND_ROBIN",INTERLEAVED_WEIGHTED_ROUND_ROBIN:"INTERLEAVED_WEIGHTED_ROUND_ROBIN"}),E=Object.freeze({runTime:"runTime",waitTime:"waitTime",elu:"elu"});class b{pool;opts;nextWorkerNodeKey=0;previousWorkerNodeKey=0;strategyPolicy={dynamicWorkerUsage:!1,dynamicWorkerReady:!0};taskStatisticsRequirements={runTime:p,waitTime:p,elu:p};constructor(e,t=m){this.pool=e,this.opts=t,this.opts={...m,...t},this.choose=this.choose.bind(this)}setTaskStatisticsRequirements(e){this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.runTime,e.runTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.waitTime,e.waitTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.elu,e.elu?.median)}toggleMedianMeasurementStatisticsRequirements(e,t){e.average&&t&&(e.average=!1,e.median=t),e.median&&!t&&(e.average=!0,e.median=t)}resetWorkerNodeKeyProperties(){this.nextWorkerNodeKey=0,this.previousWorkerNodeKey=0}setOptions(e){this.opts={...m,...e},this.setTaskStatisticsRequirements(this.opts)}isWorkerNodeReady(e){return this.pool.workerNodes[e].info.ready}hasWorkerNodeBackPressure(e){return this.pool.hasWorkerNodeBackPressure(e)}isWorkerNodeEligible(e){return this.isWorkerNodeReady(e)&&!this.hasWorkerNodeBackPressure(e)}getWorkerTaskRunTime(e){return this.taskStatisticsRequirements.runTime.median?this.pool.workerNodes[e].usage.runTime?.median??0:this.pool.workerNodes[e].usage.runTime?.average??0}getWorkerTaskWaitTime(e){return this.taskStatisticsRequirements.waitTime.median?this.pool.workerNodes[e].usage.waitTime?.median??0:this.pool.workerNodes[e].usage.waitTime?.average??0}getWorkerTaskElu(e){return this.taskStatisticsRequirements.elu.median?this.pool.workerNodes[e].usage.elu.active?.median??0:this.pool.workerNodes[e].usage.elu.active?.average??0}checkNextWorkerNodeEligibility(e){this.isWorkerNodeEligible(this.nextWorkerNodeKey)||(this.nextWorkerNodeKey=void 0,this.previousWorkerNodeKey=e??this.previousWorkerNodeKey)}computeDefaultWorkerWeight(){let e=0;for(const t of n.cpus()){const s=t.speed.toString().length-1;e+=1/(t.speed/Math.pow(10,s))*Math.pow(10,s)}return Math.round(e/n.cpus().length)}}class I extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:{aggregate:!0,average:!0,median:!1}};workersVirtualTaskEndTimestamp=[];constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.workersVirtualTaskEndTimestamp=[],!0}update(e){return this.computeWorkerVirtualTaskEndTimestamp(e),!0}choose(){return this.nextWorkerNodeKey=this.fairShareNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(e){return this.workersVirtualTaskEndTimestamp.splice(e,1),!0}fairShareNextWorkerNodeKey(){let e,t=1/0;for(const[s]of this.pool.workerNodes.entries()){null==this.workersVirtualTaskEndTimestamp[s]&&this.computeWorkerVirtualTaskEndTimestamp(s);const r=this.workersVirtualTaskEndTimestamp[s];this.isWorkerNodeEligible(s)&&r<t&&(t=r,e=s)}return e}computeWorkerVirtualTaskEndTimestamp(e){this.workersVirtualTaskEndTimestamp[e]=this.getWorkerVirtualTaskEndTimestamp(e,this.getWorkerVirtualTaskStartTimestamp(e))}getWorkerVirtualTaskEndTimestamp(e,t){return t+(this.opts.measurement===E.elu?this.getWorkerTaskElu(e):this.getWorkerTaskRunTime(e))}getWorkerVirtualTaskStartTimestamp(e){return Math.max(performance.now(),this.workersVirtualTaskEndTimestamp[e]??-1/0)}}class C extends b{roundId=0;roundWeights;defaultWorkerWeight;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight(),this.roundWeights=this.getRoundWeights()}reset(){return this.resetWorkerNodeKeyProperties(),this.roundId=0,!0}update(){return!0}choose(){let e,t=this.roundId;for(let s=this.roundId;s<this.roundWeights.length;s++){t=s;for(let t=this.nextWorkerNodeKey??this.previousWorkerNodeKey;t<this.pool.workerNodes.length;t++){const r=this.opts.weights?.[t]??this.defaultWorkerWeight;if(this.isWorkerNodeEligible(t)&&r>=this.roundWeights[s]){e=t;break}}}this.roundId=t,null==e&&(this.previousWorkerNodeKey=this.nextWorkerNodeKey??this.previousWorkerNodeKey),this.nextWorkerNodeKey=e;const s=this.nextWorkerNodeKey;return this.nextWorkerNodeKey===this.pool.workerNodes.length-1?(this.nextWorkerNodeKey=0,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1):this.nextWorkerNodeKey=(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,s}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1)),!0}setOptions(e){super.setOptions(e),this.roundWeights=this.getRoundWeights()}getRoundWeights(){return null==this.opts.weights?[this.defaultWorkerWeight]:[...new Set(Object.values(this.opts.weights).slice().sort(((e,t)=>e-t)))]}}class v extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!1,median:!1},waitTime:{aggregate:!0,average:!1,median:!1},elu:p};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastBusyNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastBusyNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=(r.usage.runTime?.aggregate??0)+(r.usage.waitTime?.aggregate??0);if(this.isWorkerNodeEligible(s)&&0===i){e=s;break}this.isWorkerNodeEligible(s)&&i<t&&(t=i,e=s)}return e}}class R extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastUsedNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastUsedNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage.tasks,o=i.executed+i.executing+i.queued;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class O extends b{taskStatisticsRequirements={runTime:p,waitTime:p,elu:{aggregate:!0,average:!1,median:!1}};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastEluNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastEluNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage,o=i.elu?.active?.aggregate??0;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class F extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.resetWorkerNodeKeyProperties(),!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.roundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1)),!0}roundRobinNextWorkerNodeKey(){return this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.nextWorkerNodeKey}}class z extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:p};defaultWorkerWeight;workerVirtualTaskRunTime=0;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight()}reset(){return this.resetWorkerNodeKeyProperties(),this.workerVirtualTaskRunTime=0,!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.weightedRoundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1),this.workerVirtualTaskRunTime=0),!0}weightedRoundRobinNextWorkerNodeKey(){const e=this.workerVirtualTaskRunTime;return e<(this.opts.weights?.[this.nextWorkerNodeKey??this.previousWorkerNodeKey]??this.defaultWorkerWeight)?this.workerVirtualTaskRunTime=e+this.getWorkerTaskRunTime(this.nextWorkerNodeKey??this.previousWorkerNodeKey):(this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.workerVirtualTaskRunTime=0),this.nextWorkerNodeKey}}class M{workerChoiceStrategy;opts;workerChoiceStrategies;choiceRetriesCount=0;constructor(e,t=S.ROUND_ROBIN,s=m){this.workerChoiceStrategy=t,this.opts=s,this.opts={...m,...s},this.execute=this.execute.bind(this),this.workerChoiceStrategies=new Map([[S.ROUND_ROBIN,new(F.bind(this))(e,s)],[S.LEAST_USED,new(R.bind(this))(e,s)],[S.LEAST_BUSY,new(v.bind(this))(e,s)],[S.LEAST_ELU,new(O.bind(this))(e,s)],[S.FAIR_SHARE,new(I.bind(this))(e,s)],[S.WEIGHTED_ROUND_ROBIN,new(z.bind(this))(e,s)],[S.INTERLEAVED_WEIGHTED_ROUND_ROBIN,new(C.bind(this))(e,s)]])}getStrategyPolicy(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).strategyPolicy}getTaskStatisticsRequirements(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).taskStatisticsRequirements}setWorkerChoiceStrategy(e){this.workerChoiceStrategy!==e&&(this.workerChoiceStrategy=e),this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset()}update(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).update(e)}execute(){const e=this.workerChoiceStrategies.get(this.workerChoiceStrategy).choose();if(null==e&&this.choiceRetriesCount<this.opts.choiceRetries)return this.choiceRetriesCount++,this.execute();if(null==e)throw new Error(`Worker node key chosen is null or undefined after ${this.choiceRetriesCount} retries`);return this.choiceRetriesCount=0,e}remove(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).remove(e)}setOptions(e){this.opts={...m,...e};for(const t of this.workerChoiceStrategies.values())t.setOptions(e)}}class K extends Array{size;constructor(e=1024,...t){super(),this.checkSize(e),this.size=e,arguments.length>1&&this.push(...t)}push(...e){const t=super.push(...e);return t>this.size&&super.splice(0,t-this.size),this.length}unshift(...e){return super.unshift(...e)>this.size&&super.splice(this.size,e.length),this.length}concat(...e){const t=super.concat(e);return t.size=this.size,t.length>t.size&&t.splice(0,t.length-t.size),t}splice(e,t,...s){let r=[];if(arguments.length>=3&&null!=t){if(r=super.splice(e,t,...s),this.length>this.size){const e=super.splice(0,this.length-this.size);r=new K(r.length+e.length,...r,...e)}}else r=2===arguments.length?super.splice(e,t):super.splice(e);return r}resize(e){if(this.checkSize(e),0===e)this.length=0;else if(e<this.size)for(let t=e;t<this.size;t++)super.pop();this.size=e}empty(){return 0===this.length}full(){return this.length===this.size}checkSize(e){if(!Number.isSafeInteger(e))throw new TypeError(`Invalid circular array size: ${e} is not a safe integer`);if(e<0)throw new RangeError(`Invalid circular array size: ${e} < 0`)}}class P{items;offset;size;maxSize;constructor(){this.clear()}enqueue(e){return this.items.push(e),++this.size,this.size>this.maxSize&&(this.maxSize=this.size),this.size}dequeue(){if(this.size<=0)return;const e=this.items[this.offset];return 2*++this.offset>=this.items.length&&(this.items=this.items.slice(this.offset),this.offset=0),--this.size,e}peek(){if(!(this.size<=0))return this.items[this.offset]}clear(){this.items=[],this.offset=0,this.size=0,this.maxSize=0}[Symbol.iterator](){const e=this.items;let t=this.offset;return{next:()=>{if(t>=e.length)return{value:void 0,done:!0};const s=e[t];return++t,{value:s,done:!1}}}}}const q=Object.freeze({thread:"thread",cluster:"cluster"});class Q{worker;info;messageChannel;usage;taskFunctionsUsage;tasksQueue;tasksQueueBackPressureSize;constructor(e,s,r){if(null==e)throw new TypeError("Cannot construct a worker node without a worker");if(null==s)throw new TypeError("Cannot construct a worker node without a worker type");if(null==r)throw new TypeError("Cannot construct a worker node without a pool maximum size");if(!Number.isSafeInteger(r))throw new TypeError("Cannot construct a worker node with a pool maximum size that is not an integer");this.worker=e,this.info=this.initWorkerInfo(e,s),s===q.thread&&(this.messageChannel=new t.MessageChannel),this.usage=this.initWorkerUsage(),this.taskFunctionsUsage=new Map,this.tasksQueue=new P,this.tasksQueueBackPressureSize=Math.pow(r,2)}tasksQueueSize(){return this.tasksQueue.size}tasksQueueMaxSize(){return this.tasksQueue.maxSize}enqueueTask(e){return this.tasksQueue.enqueue(e)}dequeueTask(){return this.tasksQueue.dequeue()}clearTasksQueue(){this.tasksQueue.clear()}hasBackPressure(){return this.tasksQueue.size>=this.tasksQueueBackPressureSize}resetUsage(){this.usage=this.initWorkerUsage(),this.taskFunctionsUsage.clear()}closeChannel(){null!=this.messageChannel&&(this.messageChannel?.port1.unref(),this.messageChannel?.port2.unref(),this.messageChannel?.port1.close(),this.messageChannel?.port2.close(),delete this.messageChannel)}getTaskFunctionWorkerUsage(e){if(!Array.isArray(this.info.taskFunctions))throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list is not yet defined`);if(Array.isArray(this.info.taskFunctions)&&this.info.taskFunctions.length<3)throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list has less than 3 elements`);return e===l&&(e=this.info.taskFunctions[1]),this.taskFunctionsUsage.has(e)||this.taskFunctionsUsage.set(e,this.initTaskFunctionWorkerUsage(e)),this.taskFunctionsUsage.get(e)}initWorkerInfo(e,t){return{id:this.getWorkerId(e,t),type:t,dynamic:!1,ready:!1}}initWorkerUsage(){const e=()=>this.tasksQueueSize(),t=()=>this.tasksQueueMaxSize();return{tasks:{executed:0,executing:0,get queued(){return e()},get maxQueued(){return t()},failed:0},runTime:{history:new K},waitTime:{history:new K},elu:{idle:{history:new K},active:{history:new K}}}}initTaskFunctionWorkerUsage(e){const t=()=>{let t=0;for(const s of this.tasksQueue)(s.name===l&&e===this.info.taskFunctions[1]||s.name!==l&&e===s.name)&&++t;return t};return{tasks:{executed:0,executing:0,get queued(){return t()},failed:0},runTime:{history:new K},waitTime:{history:new K},elu:{idle:{history:new K},active:{history:new K}}}}getWorkerId(e,t){return t===q.thread?e.threadId:t===q.cluster?e.id:void 0}}class A{numberOfWorkers;filePath;opts;workerNodes=[];emitter;promiseResponseMap=new Map;workerChoiceStrategyContext;max;starting;startTimestamp;constructor(e,t,s){if(this.numberOfWorkers=e,this.filePath=t,this.opts=s,!this.isMain())throw new Error("Cannot start a pool from a worker with the same type as the pool");this.checkNumberOfWorkers(this.numberOfWorkers),this.checkFilePath(this.filePath),this.checkPoolOptions(this.opts),this.chooseWorkerNode=this.chooseWorkerNode.bind(this),this.executeTask=this.executeTask.bind(this),this.enqueueTask=this.enqueueTask.bind(this),!0===this.opts.enableEvents&&(this.emitter=new c),this.workerChoiceStrategyContext=new M(this,this.opts.workerChoiceStrategy,this.opts.workerChoiceStrategyOptions),this.setupHook(),this.starting=!0,this.startPool(),this.starting=!1,this.startTimestamp=i.performance.now()}checkFilePath(e){if(null==e||"string"!=typeof e||"string"==typeof e&&0===e.trim().length)throw new Error("Please specify a file with a worker implementation");if(!o.existsSync(e))throw new Error(`Cannot find the worker file '${e}'`)}checkNumberOfWorkers(e){if(null==e)throw new Error("Cannot instantiate a pool without specifying the number of workers");if(!Number.isSafeInteger(e))throw new TypeError("Cannot instantiate a pool with a non safe integer number of workers");if(e<0)throw new RangeError("Cannot instantiate a pool with a negative number of workers");if(this.type===k.fixed&&0===e)throw new RangeError("Cannot instantiate a fixed pool with zero worker")}checkDynamicPoolSize(e,t){if(this.type===k.dynamic){if(null==t)throw new TypeError("Cannot instantiate a dynamic pool without specifying the maximum pool size");if(!Number.isSafeInteger(t))throw new TypeError("Cannot instantiate a dynamic pool with a non safe integer maximum pool size");if(e>t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size inferior to the minimum pool size");if(0===t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size equal to zero");if(e===t)throw new RangeError("Cannot instantiate a dynamic pool with a minimum pool size equal to the maximum pool size. Use a fixed pool instead")}}checkPoolOptions(e){if(!f(e))throw new TypeError("Invalid pool options: must be a plain object");this.opts.workerChoiceStrategy=e.workerChoiceStrategy??S.ROUND_ROBIN,this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy),this.opts.workerChoiceStrategyOptions={...m,...e.workerChoiceStrategyOptions},this.checkValidWorkerChoiceStrategyOptions(this.opts.workerChoiceStrategyOptions),this.opts.restartWorkerOnError=e.restartWorkerOnError??!0,this.opts.enableEvents=e.enableEvents??!0,this.opts.enableTasksQueue=e.enableTasksQueue??!1,this.opts.enableTasksQueue&&(this.checkValidTasksQueueOptions(e.tasksQueueOptions),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e.tasksQueueOptions))}checkValidWorkerChoiceStrategy(e){if(!Object.values(S).includes(e))throw new Error(`Invalid worker choice strategy '${e}'`)}checkValidWorkerChoiceStrategyOptions(e){if(!f(e))throw new TypeError("Invalid worker choice strategy options: must be a plain object");if(null!=e.choiceRetries&&!Number.isSafeInteger(e.choiceRetries))throw new TypeError("Invalid worker choice strategy options: choice retries must be an integer");if(null!=e.choiceRetries&&e.choiceRetries<=0)throw new RangeError(`Invalid worker choice strategy options: choice retries '${e.choiceRetries}' must be greater than zero`);if(null!=e.weights&&Object.keys(e.weights).length!==this.maxSize)throw new Error("Invalid worker choice strategy options: must have a weight for each worker node");if(null!=e.measurement&&!Object.values(E).includes(e.measurement))throw new Error(`Invalid worker choice strategy options: invalid measurement '${e.measurement}'`)}checkValidTasksQueueOptions(e){if(null!=e&&!f(e))throw new TypeError("Invalid tasks queue options: must be a plain object");if(null!=e?.concurrency&&!Number.isSafeInteger(e.concurrency))throw new TypeError("Invalid worker tasks concurrency: must be an integer");if(null!=e?.concurrency&&e.concurrency<=0)throw new RangeError(`Invalid worker tasks concurrency: ${e.concurrency} is a negative integer or zero`)}startPool(){for(;this.workerNodes.reduce(((e,t)=>t.info.dynamic?e:e+1),0)<this.numberOfWorkers;)this.createAndSetupWorkerNode()}get info(){return{version:"2.6.31",type:this.type,worker:this.worker,ready:this.ready,strategy:this.opts.workerChoiceStrategy,minSize:this.minSize,maxSize:this.maxSize,...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{utilization:y(this.utilization)},workerNodes:this.workerNodes.length,idleWorkerNodes:this.workerNodes.reduce(((e,t)=>0===t.usage.tasks.executing?e+1:e),0),busyWorkerNodes:this.workerNodes.reduce(((e,t)=>t.usage.tasks.executing>0?e+1:e),0),executedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executed),0),executingTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executing),0),...!0===this.opts.enableTasksQueue&&{queuedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.queued),0)},...!0===this.opts.enableTasksQueue&&{maxQueuedTasks:this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.maxQueued??0)),0)},...!0===this.opts.enableTasksQueue&&{backPressure:this.hasBackPressure()},failedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.failed),0),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&{runTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.runTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.runTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.runTime?.median??0))))}}},...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{waitTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.waitTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.waitTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.waitTime?.median??0))))}}}}}get ready(){return this.workerNodes.reduce(((e,t)=>!t.info.dynamic&&t.info.ready?e+1:e),0)>=this.minSize}get utilization(){const e=(i.performance.now()-this.startTimestamp)*this.maxSize;return(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)+this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0))/e}get minSize(){return this.numberOfWorkers}get maxSize(){return this.max??this.numberOfWorkers}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Worker message received without worker id");if(null!=e.workerId&&-1===this.getWorkerNodeKeyByWorkerId(e.workerId))throw new Error(`Worker message received from unknown worker '${e.workerId}'`)}getWorkerNodeKeyByWorker(e){return this.workerNodes.findIndex((t=>t.worker===e))}getWorkerNodeKeyByWorkerId(e){return this.workerNodes.findIndex((t=>t.info.id===e))}setWorkerChoiceStrategy(e,t){this.checkValidWorkerChoiceStrategy(e),this.opts.workerChoiceStrategy=e,this.workerChoiceStrategyContext.setWorkerChoiceStrategy(this.opts.workerChoiceStrategy),null!=t&&this.setWorkerChoiceStrategyOptions(t);for(const[e,t]of this.workerNodes.entries())t.resetUsage(),this.sendStatisticsMessageToWorker(e)}setWorkerChoiceStrategyOptions(e){this.checkValidWorkerChoiceStrategyOptions(e),this.opts.workerChoiceStrategyOptions={...m,...e},this.workerChoiceStrategyContext.setOptions(this.opts.workerChoiceStrategyOptions)}enableTasksQueue(e,t){!0!==this.opts.enableTasksQueue||e||this.flushTasksQueues(),this.opts.enableTasksQueue=e,this.setTasksQueueOptions(t)}setTasksQueueOptions(e){!0===this.opts.enableTasksQueue?(this.checkValidTasksQueueOptions(e),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e)):null!=this.opts.tasksQueueOptions&&delete this.opts.tasksQueueOptions}buildTasksQueueOptions(e){return{concurrency:e?.concurrency??1}}get full(){return this.workerNodes.length>=this.maxSize}internalBusy(){return!0===this.opts.enableTasksQueue?-1===this.workerNodes.findIndex((e=>e.info.ready&&e.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency)):-1===this.workerNodes.findIndex((e=>e.info.ready&&0===e.usage.tasks.executing))}listTaskFunctions(){for(const e of this.workerNodes)if(Array.isArray(e.info.taskFunctions)&&e.info.taskFunctions.length>0)return e.info.taskFunctions;return[]}async execute(e,t,s){return await new Promise(((o,n)=>{null!=t&&"string"!=typeof t&&n(new TypeError("name argument must be a string")),null!=t&&"string"==typeof t&&0===t.trim().length&&n(new TypeError("name argument must not be an empty string")),null==s||Array.isArray(s)||n(new TypeError("transferList argument must be an array"));const a=i.performance.now(),h=this.chooseWorkerNode(),u=this.getWorkerInfo(h);null!=t&&Array.isArray(u.taskFunctions)&&!u.taskFunctions.includes(t)&&n(new Error(`Task function '${t}' is not registered in the pool`));const k={name:t??l,data:e??{},transferList:s,timestamp:a,workerId:u.id,taskId:r.randomUUID()};this.promiseResponseMap.set(k.taskId,{resolve:o,reject:n,workerNodeKey:h}),!1===this.opts.enableTasksQueue||!0===this.opts.enableTasksQueue&&this.workerNodes[h].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency?this.executeTask(h,k):this.enqueueTask(h,k)}))}async destroy(){await Promise.all(this.workerNodes.map((async(e,t)=>{await this.destroyWorkerNode(t)}))),this.emitter?.emit(d.destroy,this.info)}async sendKillMessageToWorker(e,t){await new Promise(((s,r)=>{this.registerWorkerMessageListener(e,(e=>{"success"===e.kill?s():"failure"===e.kill&&r(new Error(`Worker ${t} kill message handling failed`))})),this.sendToWorker(e,{kill:!0,workerId:t})}))}setupHook(){}beforeTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name);++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}}afterTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name??l);this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}}shallUpdateTaskFunctionWorkerUsage(e){const t=this.getWorkerInfo(e);return null!=t&&Array.isArray(t.taskFunctions)&&t.taskFunctions.length>2}updateTaskStatisticsWorkerUsage(e,t){const s=e.tasks;if(null!=s.executing&&s.executing>0)--s.executing;else if(null!=s.executing&&s.executing<0)throw new Error("Worker usage statistic for tasks executing cannot be negative");null==t.taskError?++s.executed:++s.failed}updateRunTimeWorkerUsage(e,t){N(e.runTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime,t.taskPerformance?.runTime??0,e.tasks.executed)}updateWaitTimeWorkerUsage(e,t){const s=i.performance.now(),r=s-(t.timestamp??s);N(e.waitTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime,r,e.tasks.executed)}updateEluWorkerUsage(e,t){const s=this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu;N(e.elu.active,s,t.taskPerformance?.elu?.active??0,e.tasks.executed),N(e.elu.idle,s,t.taskPerformance?.elu?.idle??0,e.tasks.executed),s.aggregate&&null!=t.taskPerformance?.elu&&(null!=e.elu.utilization?e.elu.utilization=(e.elu.utilization+t.taskPerformance.elu.utilization)/2:e.elu.utilization=t.taskPerformance.elu.utilization)}chooseWorkerNode(){if(this.shallCreateDynamicWorker()){const e=this.createAndSetupDynamicWorkerNode();if(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)return e}return this.workerChoiceStrategyContext.execute()}shallCreateDynamicWorker(){return this.type===k.dynamic&&!this.full&&this.internalBusy()}createAndSetupWorkerNode(){const e=this.createWorker();e.on("online",this.opts.onlineHandler??g),e.on("message",this.opts.messageHandler??g),e.on("error",this.opts.errorHandler??g),e.on("error",(t=>{const s=this.getWorkerNodeKeyByWorker(e),r=this.getWorkerInfo(s);r.ready=!1,this.workerNodes[s].closeChannel(),this.emitter?.emit(d.error,t),!0!==this.opts.restartWorkerOnError||this.starting||(r.dynamic?this.createAndSetupDynamicWorkerNode():this.createAndSetupWorkerNode()),!0===this.opts.enableTasksQueue&&this.redistributeQueuedTasks(s)})),e.on("exit",this.opts.exitHandler??g),e.once("exit",(()=>{this.removeWorkerNode(e)}));const t=this.addWorkerNode(e);return this.afterWorkerNodeSetup(t),t}createAndSetupDynamicWorkerNode(){const e=this.createAndSetupWorkerNode();this.registerWorkerMessageListener(e,(e=>{const t=this.getWorkerNodeKeyByWorkerId(e.workerId),s=this.workerNodes[t].usage;(T(x.HARD,e.kill)||T(x.SOFT,e.kill)&&(!1===this.opts.enableTasksQueue&&0===s.tasks.executing||!0===this.opts.enableTasksQueue&&0===s.tasks.executing&&0===this.tasksQueueSize(t)))&&this.destroyWorkerNode(t).catch((e=>{this.emitter?.emit(d.error,e)}))}));const t=this.getWorkerInfo(e);return this.sendToWorker(e,{checkActive:!0,workerId:t.id}),t.dynamic=!0,(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerReady||this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)&&(t.ready=!0),this.checkAndEmitDynamicWorkerCreationEvents(),e}afterWorkerNodeSetup(e){this.registerWorkerMessageListener(e,this.workerListener()),this.sendStartupMessageToWorker(e),this.sendStatisticsMessageToWorker(e)}sendStatisticsMessageToWorker(e){this.sendToWorker(e,{statistics:{runTime:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate,elu:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu.aggregate},workerId:this.getWorkerInfo(e).id})}redistributeQueuedTasks(e){for(;this.tasksQueueSize(e)>0;){let t=e,s=1/0,r=!1;for(const[i,o]of this.workerNodes.entries()){const n=this.getWorkerInfo(i);if(i!==e&&n.ready&&0===o.usage.tasks.queued){this.workerNodes[i].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&(r=!0),t=i;break}i!==e&&n.ready&&o.usage.tasks.queued<s&&(s=o.usage.tasks.queued,t=i)}r?this.executeTask(t,this.dequeueTask(e)):this.enqueueTask(t,this.dequeueTask(e))}}workerListener(){return e=>{this.checkMessageWorkerId(e),null!=e.ready&&null!=e.taskFunctions?this.handleWorkerReadyResponse(e):null!=e.taskId?this.handleTaskExecutionResponse(e):null!=e.taskFunctions&&(this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId)).taskFunctions=e.taskFunctions)}}handleWorkerReadyResponse(e){if(!1===e.ready)throw new Error(`Worker ${e.workerId} failed to initialize`);const t=this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId));t.ready=e.ready,t.taskFunctions=e.taskFunctions,null!=this.emitter&&this.ready&&this.emitter.emit(d.ready,this.info)}handleTaskExecutionResponse(e){const{taskId:t,taskError:s,data:r}=e,i=this.promiseResponseMap.get(t);if(null!=i){null!=s?(this.emitter?.emit(d.taskError,s),i.reject(s.message)):i.resolve(r);const o=i.workerNodeKey;this.afterTaskExecutionHook(o,e),this.promiseResponseMap.delete(t),!0===this.opts.enableTasksQueue&&this.tasksQueueSize(o)>0&&this.workerNodes[o].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&this.executeTask(o,this.dequeueTask(o)),this.workerChoiceStrategyContext.update(o)}}checkAndEmitTaskExecutionEvents(){this.busy&&this.emitter?.emit(d.busy,this.info)}checkAndEmitTaskQueuingEvents(){this.hasBackPressure()&&this.emitter?.emit(d.backPressure,this.info)}checkAndEmitDynamicWorkerCreationEvents(){this.type===k.dynamic&&this.full&&this.emitter?.emit(d.full,this.info)}getWorkerInfo(e){return this.workerNodes[e]?.info}addWorkerNode(e){const t=new Q(e,this.worker,this.maxSize);this.starting&&(t.info.ready=!0),this.workerNodes.push(t);const s=this.getWorkerNodeKeyByWorker(e);if(-1===s)throw new Error("Worker node added not found");return s}removeWorkerNode(e){const t=this.getWorkerNodeKeyByWorker(e);-1!==t&&(this.workerNodes.splice(t,1),this.workerChoiceStrategyContext.remove(t))}hasWorkerNodeBackPressure(e){return!0===this.opts.enableTasksQueue&&this.workerNodes[e].hasBackPressure()}hasBackPressure(){return!0===this.opts.enableTasksQueue&&-1===this.workerNodes.findIndex((e=>!e.hasBackPressure()))}executeTask(e,t){this.beforeTaskExecutionHook(e,t),this.sendToWorker(e,t,t.transferList),this.checkAndEmitTaskExecutionEvents()}enqueueTask(e,t){const s=this.workerNodes[e].enqueueTask(t);return this.checkAndEmitTaskQueuingEvents(),s}dequeueTask(e){return this.workerNodes[e].dequeueTask()}tasksQueueSize(e){return this.workerNodes[e].tasksQueueSize()}flushTasksQueue(e){for(;this.tasksQueueSize(e)>0;)this.executeTask(e,this.dequeueTask(e));this.workerNodes[e].clearTasksQueue()}flushTasksQueues(){for(const[e]of this.workerNodes.entries())this.flushTasksQueue(e)}}class U extends A{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}setupHook(){s.setupPrimary({...this.opts.settings,exec:this.filePath})}isMain(){return s.isPrimary}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e].worker,s=new Promise((e=>{t.on("exit",(()=>{e()}))}));t.on("disconnect",(()=>{t.kill()})),await this.sendKillMessageToWorker(e,t.id),t.disconnect(),await s}sendToWorker(e,t){this.workerNodes[e].worker.send(t)}sendStartupMessageToWorker(e){this.sendToWorker(e,{ready:!1,workerId:this.workerNodes[e].worker.id})}registerWorkerMessageListener(e,t){this.workerNodes[e].worker.on("message",t)}createWorker(){return s.fork(this.opts.env)}get type(){return k.fixed}get worker(){return q.cluster}get busy(){return this.internalBusy()}}class B extends A{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}isMain(){return t.isMainThread}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e],s=t.worker,r=new Promise((e=>{s.on("exit",(()=>{e()}))}));await this.sendKillMessageToWorker(e,s.threadId),t.closeChannel(),await s.terminate(),await r}sendToWorker(e,t,s){this.workerNodes[e].messageChannel.port1.postMessage(t,s)}sendStartupMessageToWorker(e){const t=this.workerNodes[e].worker,s=this.workerNodes[e].messageChannel.port2;t.postMessage({ready:!1,workerId:t.threadId,port:s},[s])}registerWorkerMessageListener(e,t){this.workerNodes[e].messageChannel.port1.on("message",t)}createWorker(){return new t.Worker(this.filePath,{env:t.SHARE_ENV,...this.opts.workerOptions})}get type(){return k.fixed}get worker(){return q.thread}get busy(){return this.internalBusy()}}const D=6e4,L={killBehavior:x.SOFT,maxInactiveTime:D,killHandler:g};class _ extends a.AsyncResource{isMain;mainWorker;opts;taskFunctions;lastTaskTimestamp;statistics;activeInterval;constructor(e,t,s,r,i=L){super(e),this.isMain=t,this.mainWorker=s,this.opts=i,this.checkWorkerOptions(this.opts),this.checkTaskFunctions(r),this.isMain||this.getMainWorker()?.on("message",this.handleReadyMessage.bind(this))}checkWorkerOptions(e){this.opts={...L,...e},delete this.opts.async}checkTaskFunctions(e){if(null==e)throw new Error("taskFunctions parameter is mandatory");if(this.taskFunctions=new Map,"function"==typeof e){const t=e.bind(this);this.taskFunctions.set(l,t),this.taskFunctions.set("string"==typeof e.name&&e.name.trim().length>0?e.name:"fn1",t)}else{if(!f(e))throw new TypeError("taskFunctions parameter is not a function or a plain object");{let t=!0;for(const[s,r]of Object.entries(e)){if("string"!=typeof s)throw new TypeError("A taskFunctions parameter object key is not a string");if("string"==typeof s&&0===s.trim().length)throw new TypeError("A taskFunctions parameter object key an empty string");if("function"!=typeof r)throw new TypeError("A taskFunctions parameter object value is not a function");const e=r.bind(this);t&&(this.taskFunctions.set(l,e),t=!1),this.taskFunctions.set(s,e)}if(t)throw new Error("taskFunctions parameter object is empty")}}}hasTaskFunction(e){return this.checkTaskFunctionName(e),this.taskFunctions.has(e)}addTaskFunction(e,t){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot add a task function with the default reserved name");if("function"!=typeof t)throw new TypeError("fn parameter is not a function");try{const s=t.bind(this);return this.taskFunctions.get(e)===this.taskFunctions.get(l)&&this.taskFunctions.set(l,s),this.taskFunctions.set(e,s),this.sendTaskFunctionsListToMainWorker(),!0}catch{return!1}}removeTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot remove the task function with the default reserved name");if(this.taskFunctions.get(e)===this.taskFunctions.get(l))throw new Error("Cannot remove the task function used as the default task function");const t=this.taskFunctions.delete(e);return this.sendTaskFunctionsListToMainWorker(),t}listTaskFunctions(){const e=[...this.taskFunctions.keys()];let t=l;for(const[e,s]of this.taskFunctions)if(e!==l&&s===this.taskFunctions.get(l)){t=e;break}return[e[e.indexOf(l)],t,...e.filter((e=>e!==l&&e!==t))]}setDefaultTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot set the default task function reserved name as the default task function");if(!this.taskFunctions.has(e))throw new Error("Cannot set the default task function to a non-existing task function");try{return this.taskFunctions.set(l,this.taskFunctions.get(e)),!0}catch{return!1}}checkTaskFunctionName(e){if("string"!=typeof e)throw new TypeError("name parameter is not a string");if("string"==typeof e&&0===e.trim().length)throw new TypeError("name parameter is an empty string")}messageListener(e){this.checkMessageWorkerId(e),null!=e.statistics?this.statistics=e.statistics:null!=e.checkActive?e.checkActive?this.startCheckActive():this.stopCheckActive():null!=e.taskId&&null!=e.data?this.run(e):!0===e.kill&&this.handleKillMessage(e)}handleKillMessage(e){if(this.stopCheckActive(),W(this.opts.killHandler))(this.opts.killHandler?.()).then((()=>(this.sendToMainWorker({kill:"success",workerId:this.id}),null))).catch((()=>{this.sendToMainWorker({kill:"failure",workerId:this.id})})).finally((()=>{this.emitDestroy()})).catch(g);else try{this.opts.killHandler?.(),this.sendToMainWorker({kill:"success",workerId:this.id})}catch{this.sendToMainWorker({kill:"failure",workerId:this.id})}finally{this.emitDestroy()}}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Message worker id is not set");if(null!=e.workerId&&e.workerId!==this.id)throw new Error(`Message worker id ${e.workerId} does not match the worker id ${this.id}`)}startCheckActive(){this.lastTaskTimestamp=i.performance.now(),this.activeInterval=setInterval(this.checkActive.bind(this),(this.opts.maxInactiveTime??D)/2)}stopCheckActive(){null!=this.activeInterval&&(clearInterval(this.activeInterval),delete this.activeInterval)}checkActive(){i.performance.now()-this.lastTaskTimestamp>(this.opts.maxInactiveTime??D)&&this.sendToMainWorker({kill:this.opts.killBehavior,workerId:this.id})}getMainWorker(){if(null==this.mainWorker)throw new Error("Main worker not set");return this.mainWorker}sendTaskFunctionsListToMainWorker(){this.sendToMainWorker({taskFunctions:this.listTaskFunctions(),workerId:this.id})}handleError(e){return e instanceof Error?e.message:e}run(e){const t=this.getTaskFunction(e.name);W(t)?this.runInAsyncScope(this.runAsync.bind(this),this,t,e):this.runInAsyncScope(this.runSync.bind(this),this,t,e)}runSync(e,t){const{name:s,taskId:r,data:i}=t;try{let t=this.beginTaskPerformance(s);const o=e(i);t=this.endTaskPerformance(t),this.sendToMainWorker({data:o,taskPerformance:t,workerId:this.id,taskId:r})}catch(e){const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s??l,message:t,data:i},workerId:this.id,taskId:r})}finally{this.updateLastTaskTimestamp()}}runAsync(e,t){const{name:s,taskId:r,data:i}=t;let o=this.beginTaskPerformance(s);e(i).then((e=>(o=this.endTaskPerformance(o),this.sendToMainWorker({data:e,taskPerformance:o,workerId:this.id,taskId:r}),null))).catch((e=>{const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s??l,message:t,data:i},workerId:this.id,taskId:r})})).finally((()=>{this.updateLastTaskTimestamp()})).catch(g)}getTaskFunction(e){e=e??l;const t=this.taskFunctions.get(e);if(null==t)throw new Error(`Task function '${e}' not found`);return t}beginTaskPerformance(e){return this.checkStatistics(),{name:e??l,timestamp:i.performance.now(),...this.statistics.elu&&{elu:i.performance.eventLoopUtilization()}}}endTaskPerformance(e){return this.checkStatistics(),{...e,...this.statistics.runTime&&{runTime:i.performance.now()-e.timestamp},...this.statistics.elu&&{elu:i.performance.eventLoopUtilization(e.elu)}}}checkStatistics(){if(null==this.statistics)throw new Error("Performance statistics computation requirements not set")}updateLastTaskTimestamp(){null!=this.activeInterval&&(this.lastTaskTimestamp=i.performance.now())}}exports.ClusterWorker=class extends _{constructor(e,t={}){super("worker-cluster-pool:poolifier",s.isPrimary,s.worker,e,t)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready)try{this.getMainWorker()?.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}get id(){return this.getMainWorker().id}sendToMainWorker(e){this.getMainWorker().send(e)}},exports.DynamicClusterPool=class extends U{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.DynamicThreadPool=class extends B{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.FixedClusterPool=U,exports.FixedThreadPool=B,exports.KillBehaviors=x,exports.Measurements=E,exports.PoolEvents=d,exports.PoolTypes=k,exports.ThreadWorker=class extends _{port;constructor(e,s={}){super("worker-thread-pool:poolifier",t.isMainThread,t.parentPort,e,s)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready&&null!=e.port)try{this.port=e.port,this.port.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}handleKillMessage(e){super.handleKillMessage(e),this.port?.unref(),this.port?.close()}get id(){return t.threadId}sendToMainWorker(e){this.port.postMessage(e)}handleError(e){return e}},exports.WorkerChoiceStrategies=S,exports.WorkerTypes=q,exports.availableParallelism=()=>{let e=1;try{e=u.availableParallelism()}catch{const t=u.cpus();Array.isArray(t)&&t.length>0&&(e=t.length)}return e};
+"use strict";var e=require("node:events"),t=require("node:worker_threads"),s=require("node:cluster"),r=require("node:crypto"),i=require("node:perf_hooks"),o=require("node:fs"),n=require("node:os"),a=require("node:async_hooks");function h(e){var t=Object.create(null);return e&&Object.keys(e).forEach((function(s){if("default"!==s){var r=Object.getOwnPropertyDescriptor(e,s);Object.defineProperty(t,s,r.get?r:{enumerable:!0,get:function(){return e[s]}})}})),t.default=e,Object.freeze(t)}var u=h(n);const k=Object.freeze({fixed:"fixed",dynamic:"dynamic"});class c extends e.EventEmitter{}const d=Object.freeze({ready:"ready",busy:"busy",full:"full",destroy:"destroy",error:"error",taskError:"taskError",backPressure:"backPressure"}),l="default",g=Object.freeze((()=>{})),m={choiceRetries:6,runTime:{median:!1},waitTime:{median:!1},elu:{median:!1}},p={aggregate:!1,average:!1,median:!1},w=e=>{if(Array.isArray(e)&&0===e.length)return 0;if(Array.isArray(e)&&1===e.length)return e[0];const t=e.slice().sort(((e,t)=>e-t));return(t[t.length-1>>1]+t[t.length>>1])/2},y=(e,t=2)=>{const s=Math.pow(10,t);return Math.round(e*s*(1+Number.EPSILON))/s},f=e=>"object"==typeof e&&null!==e&&e?.constructor===Object&&"[object Object]"===Object.prototype.toString.call(e),T=(e,t)=>t===e,W=e=>"function"==typeof e&&"AsyncFunction"===e.constructor.name,N=(e,t,s,r)=>{t.aggregate&&(e.aggregate=(e.aggregate??0)+s,e.minimum=Math.min(s,e.minimum??1/0),e.maximum=Math.max(s,e.maximum??-1/0),t.average&&0!==r&&(e.average=e.aggregate/r),t.median&&null!=s&&(e.history.push(s),e.median=w(e.history)))},x=(e,t)=>{let s=!1;return function(...r){s||(s=!0,e.apply(t,r),s=!1)}},S=Object.freeze({SOFT:"SOFT",HARD:"HARD"}),E=Object.freeze({ROUND_ROBIN:"ROUND_ROBIN",LEAST_USED:"LEAST_USED",LEAST_BUSY:"LEAST_BUSY",LEAST_ELU:"LEAST_ELU",FAIR_SHARE:"FAIR_SHARE",WEIGHTED_ROUND_ROBIN:"WEIGHTED_ROUND_ROBIN",INTERLEAVED_WEIGHTED_ROUND_ROBIN:"INTERLEAVED_WEIGHTED_ROUND_ROBIN"}),v=Object.freeze({runTime:"runTime",waitTime:"waitTime",elu:"elu"});class b{pool;opts;nextWorkerNodeKey=0;previousWorkerNodeKey=0;strategyPolicy={dynamicWorkerUsage:!1,dynamicWorkerReady:!0};taskStatisticsRequirements={runTime:p,waitTime:p,elu:p};constructor(e,t=m){this.pool=e,this.opts=t,this.opts={...m,...t},this.choose=this.choose.bind(this)}setTaskStatisticsRequirements(e){this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.runTime,e.runTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.waitTime,e.waitTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.elu,e.elu?.median)}toggleMedianMeasurementStatisticsRequirements(e,t){e.average&&t&&(e.average=!1,e.median=t),e.median&&!t&&(e.average=!0,e.median=t)}resetWorkerNodeKeyProperties(){this.nextWorkerNodeKey=0,this.previousWorkerNodeKey=0}setOptions(e){this.opts={...m,...e},this.setTaskStatisticsRequirements(this.opts)}isWorkerNodeReady(e){return this.pool.workerNodes[e].info.ready}hasWorkerNodeBackPressure(e){return this.pool.hasWorkerNodeBackPressure(e)}isWorkerNodeEligible(e){return this.isWorkerNodeReady(e)&&!this.hasWorkerNodeBackPressure(e)}getWorkerTaskRunTime(e){return this.taskStatisticsRequirements.runTime.median?this.pool.workerNodes[e].usage.runTime?.median??0:this.pool.workerNodes[e].usage.runTime?.average??0}getWorkerTaskWaitTime(e){return this.taskStatisticsRequirements.waitTime.median?this.pool.workerNodes[e].usage.waitTime?.median??0:this.pool.workerNodes[e].usage.waitTime?.average??0}getWorkerTaskElu(e){return this.taskStatisticsRequirements.elu.median?this.pool.workerNodes[e].usage.elu.active?.median??0:this.pool.workerNodes[e].usage.elu.active?.average??0}checkNextWorkerNodeEligibility(e){this.isWorkerNodeEligible(this.nextWorkerNodeKey)||(this.nextWorkerNodeKey=void 0,this.previousWorkerNodeKey=e??this.previousWorkerNodeKey)}computeDefaultWorkerWeight(){let e=0;for(const t of n.cpus()){const s=t.speed.toString().length-1;e+=1/(t.speed/Math.pow(10,s))*Math.pow(10,s)}return Math.round(e/n.cpus().length)}}class I extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:{aggregate:!0,average:!0,median:!1}};workersVirtualTaskEndTimestamp=[];constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.workersVirtualTaskEndTimestamp=[],!0}update(e){return this.computeWorkerVirtualTaskEndTimestamp(e),!0}choose(){return this.nextWorkerNodeKey=this.fairShareNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(e){return this.workersVirtualTaskEndTimestamp.splice(e,1),!0}fairShareNextWorkerNodeKey(){let e,t=1/0;for(const[s]of this.pool.workerNodes.entries()){null==this.workersVirtualTaskEndTimestamp[s]&&this.computeWorkerVirtualTaskEndTimestamp(s);const r=this.workersVirtualTaskEndTimestamp[s];this.isWorkerNodeEligible(s)&&r<t&&(t=r,e=s)}return e}computeWorkerVirtualTaskEndTimestamp(e){this.workersVirtualTaskEndTimestamp[e]=this.getWorkerVirtualTaskEndTimestamp(e,this.getWorkerVirtualTaskStartTimestamp(e))}getWorkerVirtualTaskEndTimestamp(e,t){return t+(this.opts.measurement===v.elu?this.getWorkerTaskElu(e):this.getWorkerTaskRunTime(e))}getWorkerVirtualTaskStartTimestamp(e){return Math.max(performance.now(),this.workersVirtualTaskEndTimestamp[e]??-1/0)}}class C extends b{roundId=0;roundWeights;defaultWorkerWeight;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight(),this.roundWeights=this.getRoundWeights()}reset(){return this.resetWorkerNodeKeyProperties(),this.roundId=0,!0}update(){return!0}choose(){let e,t=this.roundId;for(let s=this.roundId;s<this.roundWeights.length;s++){t=s;for(let t=this.nextWorkerNodeKey??this.previousWorkerNodeKey;t<this.pool.workerNodes.length;t++){const r=this.opts.weights?.[t]??this.defaultWorkerWeight;if(this.isWorkerNodeEligible(t)&&r>=this.roundWeights[s]){e=t;break}}}this.roundId=t,null==e&&(this.previousWorkerNodeKey=this.nextWorkerNodeKey??this.previousWorkerNodeKey),this.nextWorkerNodeKey=e;const s=this.nextWorkerNodeKey;return this.nextWorkerNodeKey===this.pool.workerNodes.length-1?(this.nextWorkerNodeKey=0,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1):this.nextWorkerNodeKey=(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,s}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1)),!0}setOptions(e){super.setOptions(e),this.roundWeights=this.getRoundWeights()}getRoundWeights(){return null==this.opts.weights?[this.defaultWorkerWeight]:[...new Set(Object.values(this.opts.weights).slice().sort(((e,t)=>e-t)))]}}class R extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!1,median:!1},waitTime:{aggregate:!0,average:!1,median:!1},elu:p};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastBusyNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastBusyNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=(r.usage.runTime?.aggregate??0)+(r.usage.waitTime?.aggregate??0);if(this.isWorkerNodeEligible(s)&&0===i){e=s;break}this.isWorkerNodeEligible(s)&&i<t&&(t=i,e=s)}return e}}class z extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastUsedNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastUsedNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage.tasks,o=i.executed+i.executing+i.queued;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class M extends b{taskStatisticsRequirements={runTime:p,waitTime:p,elu:{aggregate:!0,average:!1,median:!1}};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastEluNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastEluNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage,o=i.elu?.active?.aggregate??0;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class O extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.resetWorkerNodeKeyProperties(),!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.roundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1)),!0}roundRobinNextWorkerNodeKey(){return this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.nextWorkerNodeKey}}class F extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:p};defaultWorkerWeight;workerVirtualTaskRunTime=0;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight()}reset(){return this.resetWorkerNodeKeyProperties(),this.workerVirtualTaskRunTime=0,!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.weightedRoundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1),this.workerVirtualTaskRunTime=0),!0}weightedRoundRobinNextWorkerNodeKey(){const e=this.workerVirtualTaskRunTime;return e<(this.opts.weights?.[this.nextWorkerNodeKey??this.previousWorkerNodeKey]??this.defaultWorkerWeight)?this.workerVirtualTaskRunTime=e+this.getWorkerTaskRunTime(this.nextWorkerNodeKey??this.previousWorkerNodeKey):(this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.workerVirtualTaskRunTime=0),this.nextWorkerNodeKey}}class K{workerChoiceStrategy;opts;workerChoiceStrategies;choiceRetriesCount=0;constructor(e,t=E.ROUND_ROBIN,s=m){this.workerChoiceStrategy=t,this.opts=s,this.opts={...m,...s},this.execute=this.execute.bind(this),this.workerChoiceStrategies=new Map([[E.ROUND_ROBIN,new(O.bind(this))(e,s)],[E.LEAST_USED,new(z.bind(this))(e,s)],[E.LEAST_BUSY,new(R.bind(this))(e,s)],[E.LEAST_ELU,new(M.bind(this))(e,s)],[E.FAIR_SHARE,new(I.bind(this))(e,s)],[E.WEIGHTED_ROUND_ROBIN,new(F.bind(this))(e,s)],[E.INTERLEAVED_WEIGHTED_ROUND_ROBIN,new(C.bind(this))(e,s)]])}getStrategyPolicy(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).strategyPolicy}getTaskStatisticsRequirements(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).taskStatisticsRequirements}setWorkerChoiceStrategy(e){this.workerChoiceStrategy!==e&&(this.workerChoiceStrategy=e),this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset()}update(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).update(e)}execute(){const e=this.workerChoiceStrategies.get(this.workerChoiceStrategy).choose();if(null==e&&this.choiceRetriesCount<this.opts.choiceRetries)return this.choiceRetriesCount++,this.execute();if(null==e)throw new Error(`Worker node key chosen is null or undefined after ${this.choiceRetriesCount} retries`);return this.choiceRetriesCount=0,e}remove(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).remove(e)}setOptions(e){this.opts={...m,...e};for(const t of this.workerChoiceStrategies.values())t.setOptions(e)}}class P extends Array{size;constructor(e=1024,...t){super(),this.checkSize(e),this.size=e,arguments.length>1&&this.push(...t)}push(...e){const t=super.push(...e);return t>this.size&&super.splice(0,t-this.size),this.length}unshift(...e){return super.unshift(...e)>this.size&&super.splice(this.size,e.length),this.length}concat(...e){const t=super.concat(e);return t.size=this.size,t.length>t.size&&t.splice(0,t.length-t.size),t}splice(e,t,...s){let r=[];if(arguments.length>=3&&null!=t){if(r=super.splice(e,t,...s),this.length>this.size){const e=super.splice(0,this.length-this.size);r=new P(r.length+e.length,...r,...e)}}else r=2===arguments.length?super.splice(e,t):super.splice(e);return r}resize(e){if(this.checkSize(e),0===e)this.length=0;else if(e<this.size)for(let t=e;t<this.size;t++)super.pop();this.size=e}empty(){return 0===this.length}full(){return this.length===this.size}checkSize(e){if(!Number.isSafeInteger(e))throw new TypeError(`Invalid circular array size: ${e} is not a safe integer`);if(e<0)throw new RangeError(`Invalid circular array size: ${e} < 0`)}}class q{value;next;prev;constructor(e){this.value=e}}class Q{head;tail;size;maxSize;constructor(){this.clear()}push(e){const t=new q(e);return null==this.tail?this.head=this.tail=t:(t.prev=this.tail,this.tail=this.tail.next=t),this.incrementSize()}unshift(e){const t=new q(e);return null==this.head?this.head=this.tail=t:(t.next=this.head,this.head=this.head.prev=t),this.incrementSize()}pop(){if(null==this.head)return;const e=this.tail;return this.tail=this.tail.prev,null==this.tail?this.head=void 0:this.tail.next=void 0,--this.size,e?.value}shift(){if(null==this.head)return;const e=this.head;return this.head=this.head.next,null==this.head?this.tail=void 0:this.head.prev=void 0,--this.size,e?.value}peekFirst(){return this.head?.value}peekLast(){return this.tail?.value}clear(){this.head=void 0,this.tail=void 0,this.size=0,this.maxSize=0}[Symbol.iterator](){let e=this.head;return{next:()=>{if(null==e)return{value:void 0,done:!0};const t={value:e.value,done:!1};return e=e.next,t}}}backward(){return{[Symbol.iterator]:()=>{let e=this.tail;return{next:()=>{if(null==e)return{value:void 0,done:!0};const t={value:e.value,done:!1};return e=e.prev,t}}}}}incrementSize(){return++this.size,this.size>this.maxSize&&(this.maxSize=this.size),this.size}}const A=Object.freeze({thread:"thread",cluster:"cluster"});class U{worker;info;messageChannel;usage;tasksQueueBackPressureSize;onBackPressure;taskFunctionsUsage;tasksQueue;constructor(e,s,r){if(null==e)throw new TypeError("Cannot construct a worker node without a worker");if(null==s)throw new TypeError("Cannot construct a worker node without a worker type");if(null==r)throw new TypeError("Cannot construct a worker node without a tasks queue back pressure size");if(!Number.isSafeInteger(r))throw new TypeError("Cannot construct a worker node with a tasks queue back pressure size that is not an integer");this.worker=e,this.info=this.initWorkerInfo(e,s),s===A.thread&&(this.messageChannel=new t.MessageChannel),this.usage=this.initWorkerUsage(),this.taskFunctionsUsage=new Map,this.tasksQueue=new Q,this.tasksQueueBackPressureSize=r}tasksQueueSize(){return this.tasksQueue.size}tasksQueueMaxSize(){return this.tasksQueue.maxSize}enqueueTask(e){const t=this.tasksQueue.push(e);return null!=this.onBackPressure&&this.hasBackPressure()&&x(this.onBackPressure,this)(this.info.id),t}unshiftTask(e){const t=this.tasksQueue.unshift(e);return null!=this.onBackPressure&&this.hasBackPressure()&&x(this.onBackPressure,this)(this.info.id),t}dequeueTask(){return this.tasksQueue.shift()}popTask(){return this.tasksQueue.pop()}clearTasksQueue(){this.tasksQueue.clear()}hasBackPressure(){return this.tasksQueue.size>=this.tasksQueueBackPressureSize}resetUsage(){this.usage=this.initWorkerUsage(),this.taskFunctionsUsage.clear()}closeChannel(){null!=this.messageChannel&&(this.messageChannel?.port1.unref(),this.messageChannel?.port2.unref(),this.messageChannel?.port1.close(),this.messageChannel?.port2.close(),delete this.messageChannel)}getTaskFunctionWorkerUsage(e){if(!Array.isArray(this.info.taskFunctions))throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list is not yet defined`);if(Array.isArray(this.info.taskFunctions)&&this.info.taskFunctions.length<3)throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list has less than 3 elements`);return e===l&&(e=this.info.taskFunctions[1]),this.taskFunctionsUsage.has(e)||this.taskFunctionsUsage.set(e,this.initTaskFunctionWorkerUsage(e)),this.taskFunctionsUsage.get(e)}initWorkerInfo(e,t){return{id:this.getWorkerId(e,t),type:t,dynamic:!1,ready:!1}}initWorkerUsage(){const e=()=>this.tasksQueueSize(),t=()=>this.tasksQueueMaxSize();return{tasks:{executed:0,executing:0,get queued(){return e()},get maxQueued(){return t()},failed:0},runTime:{history:new P},waitTime:{history:new P},elu:{idle:{history:new P},active:{history:new P}}}}initTaskFunctionWorkerUsage(e){const t=()=>{let t=0;for(const s of this.tasksQueue)(s.name===l&&e===this.info.taskFunctions[1]||s.name!==l&&e===s.name)&&++t;return t};return{tasks:{executed:0,executing:0,get queued(){return t()},failed:0},runTime:{history:new P},waitTime:{history:new P},elu:{idle:{history:new P},active:{history:new P}}}}getWorkerId(e,t){return t===A.thread?e.threadId:t===A.cluster?e.id:void 0}}class B{numberOfWorkers;filePath;opts;workerNodes=[];emitter;promiseResponseMap=new Map;workerChoiceStrategyContext;max;starting;started;startTimestamp;constructor(e,t,s){if(this.numberOfWorkers=e,this.filePath=t,this.opts=s,!this.isMain())throw new Error("Cannot start a pool from a worker with the same type as the pool");this.checkNumberOfWorkers(this.numberOfWorkers),this.checkFilePath(this.filePath),this.checkPoolOptions(this.opts),this.chooseWorkerNode=this.chooseWorkerNode.bind(this),this.executeTask=this.executeTask.bind(this),this.enqueueTask=this.enqueueTask.bind(this),!0===this.opts.enableEvents&&(this.emitter=new c),this.workerChoiceStrategyContext=new K(this,this.opts.workerChoiceStrategy,this.opts.workerChoiceStrategyOptions),this.setupHook(),this.starting=!0,this.startPool(),this.starting=!1,this.started=!0,this.startTimestamp=i.performance.now()}checkFilePath(e){if(null==e||"string"!=typeof e||"string"==typeof e&&0===e.trim().length)throw new Error("Please specify a file with a worker implementation");if(!o.existsSync(e))throw new Error(`Cannot find the worker file '${e}'`)}checkNumberOfWorkers(e){if(null==e)throw new Error("Cannot instantiate a pool without specifying the number of workers");if(!Number.isSafeInteger(e))throw new TypeError("Cannot instantiate a pool with a non safe integer number of workers");if(e<0)throw new RangeError("Cannot instantiate a pool with a negative number of workers");if(this.type===k.fixed&&0===e)throw new RangeError("Cannot instantiate a fixed pool with zero worker")}checkDynamicPoolSize(e,t){if(this.type===k.dynamic){if(null==t)throw new TypeError("Cannot instantiate a dynamic pool without specifying the maximum pool size");if(!Number.isSafeInteger(t))throw new TypeError("Cannot instantiate a dynamic pool with a non safe integer maximum pool size");if(e>t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size inferior to the minimum pool size");if(0===t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size equal to zero");if(e===t)throw new RangeError("Cannot instantiate a dynamic pool with a minimum pool size equal to the maximum pool size. Use a fixed pool instead")}}checkPoolOptions(e){if(!f(e))throw new TypeError("Invalid pool options: must be a plain object");this.opts.workerChoiceStrategy=e.workerChoiceStrategy??E.ROUND_ROBIN,this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy),this.opts.workerChoiceStrategyOptions={...m,...e.workerChoiceStrategyOptions},this.checkValidWorkerChoiceStrategyOptions(this.opts.workerChoiceStrategyOptions),this.opts.restartWorkerOnError=e.restartWorkerOnError??!0,this.opts.enableEvents=e.enableEvents??!0,this.opts.enableTasksQueue=e.enableTasksQueue??!1,this.opts.enableTasksQueue&&(this.checkValidTasksQueueOptions(e.tasksQueueOptions),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e.tasksQueueOptions))}checkValidWorkerChoiceStrategy(e){if(!Object.values(E).includes(e))throw new Error(`Invalid worker choice strategy '${e}'`)}checkValidWorkerChoiceStrategyOptions(e){if(!f(e))throw new TypeError("Invalid worker choice strategy options: must be a plain object");if(null!=e.choiceRetries&&!Number.isSafeInteger(e.choiceRetries))throw new TypeError("Invalid worker choice strategy options: choice retries must be an integer");if(null!=e.choiceRetries&&e.choiceRetries<=0)throw new RangeError(`Invalid worker choice strategy options: choice retries '${e.choiceRetries}' must be greater than zero`);if(null!=e.weights&&Object.keys(e.weights).length!==this.maxSize)throw new Error("Invalid worker choice strategy options: must have a weight for each worker node");if(null!=e.measurement&&!Object.values(v).includes(e.measurement))throw new Error(`Invalid worker choice strategy options: invalid measurement '${e.measurement}'`)}checkValidTasksQueueOptions(e){if(null!=e&&!f(e))throw new TypeError("Invalid tasks queue options: must be a plain object");if(null!=e?.concurrency&&!Number.isSafeInteger(e.concurrency))throw new TypeError("Invalid worker node tasks concurrency: must be an integer");if(null!=e?.concurrency&&e.concurrency<=0)throw new RangeError(`Invalid worker node tasks concurrency: ${e.concurrency} is a negative integer or zero`);if(null!=e?.queueMaxSize&&!Number.isSafeInteger(e.queueMaxSize))throw new TypeError("Invalid worker node tasks queue max size: must be an integer");if(null!=e?.queueMaxSize&&e.queueMaxSize<=0)throw new RangeError(`Invalid worker node tasks queue max size: ${e.queueMaxSize} is a negative integer or zero`)}startPool(){for(;this.workerNodes.reduce(((e,t)=>t.info.dynamic?e:e+1),0)<this.numberOfWorkers;)this.createAndSetupWorkerNode()}get info(){return{version:"2.6.32",type:this.type,worker:this.worker,ready:this.ready,strategy:this.opts.workerChoiceStrategy,minSize:this.minSize,maxSize:this.maxSize,...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{utilization:y(this.utilization)},workerNodes:this.workerNodes.length,idleWorkerNodes:this.workerNodes.reduce(((e,t)=>0===t.usage.tasks.executing?e+1:e),0),busyWorkerNodes:this.workerNodes.reduce(((e,t)=>t.usage.tasks.executing>0?e+1:e),0),executedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executed),0),executingTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executing),0),...!0===this.opts.enableTasksQueue&&{queuedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.queued),0)},...!0===this.opts.enableTasksQueue&&{maxQueuedTasks:this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.maxQueued??0)),0)},...!0===this.opts.enableTasksQueue&&{backPressure:this.hasBackPressure()},failedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.failed),0),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&{runTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.runTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.runTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.runTime?.median??0))))}}},...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{waitTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.waitTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.waitTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.waitTime?.median??0))))}}}}}get ready(){return this.workerNodes.reduce(((e,t)=>!t.info.dynamic&&t.info.ready?e+1:e),0)>=this.minSize}get utilization(){const e=(i.performance.now()-this.startTimestamp)*this.maxSize;return(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)+this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0))/e}get minSize(){return this.numberOfWorkers}get maxSize(){return this.max??this.numberOfWorkers}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Worker message received without worker id");if(null!=e.workerId&&-1===this.getWorkerNodeKeyByWorkerId(e.workerId))throw new Error(`Worker message received from unknown worker '${e.workerId}'`)}getWorkerNodeKeyByWorker(e){return this.workerNodes.findIndex((t=>t.worker===e))}getWorkerNodeKeyByWorkerId(e){return this.workerNodes.findIndex((t=>t.info.id===e))}setWorkerChoiceStrategy(e,t){this.checkValidWorkerChoiceStrategy(e),this.opts.workerChoiceStrategy=e,this.workerChoiceStrategyContext.setWorkerChoiceStrategy(this.opts.workerChoiceStrategy),null!=t&&this.setWorkerChoiceStrategyOptions(t);for(const[e,t]of this.workerNodes.entries())t.resetUsage(),this.sendStatisticsMessageToWorker(e)}setWorkerChoiceStrategyOptions(e){this.checkValidWorkerChoiceStrategyOptions(e),this.opts.workerChoiceStrategyOptions={...m,...e},this.workerChoiceStrategyContext.setOptions(this.opts.workerChoiceStrategyOptions)}enableTasksQueue(e,t){!0!==this.opts.enableTasksQueue||e||this.flushTasksQueues(),this.opts.enableTasksQueue=e,this.setTasksQueueOptions(t)}setTasksQueueOptions(e){!0===this.opts.enableTasksQueue?(this.checkValidTasksQueueOptions(e),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e),this.setTasksQueueMaxSize(this.opts.tasksQueueOptions.queueMaxSize)):null!=this.opts.tasksQueueOptions&&delete this.opts.tasksQueueOptions}setTasksQueueMaxSize(e){for(const t of this.workerNodes)t.tasksQueueBackPressureSize=e}buildTasksQueueOptions(e){return{queueMaxSize:Math.pow(this.maxSize,2),concurrency:1,...e}}get full(){return this.workerNodes.length>=this.maxSize}internalBusy(){return!0===this.opts.enableTasksQueue?-1===this.workerNodes.findIndex((e=>e.info.ready&&e.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency)):-1===this.workerNodes.findIndex((e=>e.info.ready&&0===e.usage.tasks.executing))}listTaskFunctions(){for(const e of this.workerNodes)if(Array.isArray(e.info.taskFunctions)&&e.info.taskFunctions.length>0)return e.info.taskFunctions;return[]}async execute(e,t,s){return await new Promise(((o,n)=>{this.started||n(new Error("Cannot execute a task on destroyed pool")),null!=t&&"string"!=typeof t&&n(new TypeError("name argument must be a string")),null!=t&&"string"==typeof t&&0===t.trim().length&&n(new TypeError("name argument must not be an empty string")),null==s||Array.isArray(s)||n(new TypeError("transferList argument must be an array"));const a=i.performance.now(),h=this.chooseWorkerNode(),u=this.getWorkerInfo(h);null!=t&&Array.isArray(u.taskFunctions)&&!u.taskFunctions.includes(t)&&n(new Error(`Task function '${t}' is not registered in the pool`));const k={name:t??l,data:e??{},transferList:s,timestamp:a,workerId:u.id,taskId:r.randomUUID()};this.promiseResponseMap.set(k.taskId,{resolve:o,reject:n,workerNodeKey:h}),!1===this.opts.enableTasksQueue||!0===this.opts.enableTasksQueue&&this.workerNodes[h].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency?this.executeTask(h,k):this.enqueueTask(h,k)}))}async destroy(){await Promise.all(this.workerNodes.map((async(e,t)=>{await this.destroyWorkerNode(t)}))),this.emitter?.emit(d.destroy,this.info),this.started=!1}async sendKillMessageToWorker(e,t){await new Promise(((s,r)=>{this.registerWorkerMessageListener(e,(e=>{"success"===e.kill?s():"failure"===e.kill&&r(new Error(`Worker ${t} kill message handling failed`))})),this.sendToWorker(e,{kill:!0,workerId:t})}))}setupHook(){}beforeTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name);++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}}afterTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name);this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}}shallUpdateTaskFunctionWorkerUsage(e){const t=this.getWorkerInfo(e);return null!=t&&Array.isArray(t.taskFunctions)&&t.taskFunctions.length>2}updateTaskStatisticsWorkerUsage(e,t){const s=e.tasks;null!=s.executing&&s.executing>0&&--s.executing,null==t.taskError?++s.executed:++s.failed}updateRunTimeWorkerUsage(e,t){N(e.runTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime,t.taskPerformance?.runTime??0,e.tasks.executed)}updateWaitTimeWorkerUsage(e,t){const s=i.performance.now(),r=s-(t.timestamp??s);N(e.waitTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime,r,e.tasks.executed)}updateEluWorkerUsage(e,t){const s=this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu;N(e.elu.active,s,t.taskPerformance?.elu?.active??0,e.tasks.executed),N(e.elu.idle,s,t.taskPerformance?.elu?.idle??0,e.tasks.executed),s.aggregate&&null!=t.taskPerformance?.elu&&(null!=e.elu.utilization?e.elu.utilization=(e.elu.utilization+t.taskPerformance.elu.utilization)/2:e.elu.utilization=t.taskPerformance.elu.utilization)}chooseWorkerNode(){if(this.shallCreateDynamicWorker()){const e=this.createAndSetupDynamicWorkerNode();if(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)return e}return this.workerChoiceStrategyContext.execute()}shallCreateDynamicWorker(){return this.type===k.dynamic&&!this.full&&this.internalBusy()}createAndSetupWorkerNode(){const e=this.createWorker();e.on("online",this.opts.onlineHandler??g),e.on("message",this.opts.messageHandler??g),e.on("error",this.opts.errorHandler??g),e.on("error",(t=>{const s=this.getWorkerNodeKeyByWorker(e),r=this.getWorkerInfo(s);r.ready=!1,this.workerNodes[s].closeChannel(),this.emitter?.emit(d.error,t),!0===this.opts.restartWorkerOnError&&!this.starting&&this.started&&(r.dynamic?this.createAndSetupDynamicWorkerNode():this.createAndSetupWorkerNode()),!0===this.opts.enableTasksQueue&&this.redistributeQueuedTasks(s)})),e.on("exit",this.opts.exitHandler??g),e.once("exit",(()=>{this.removeWorkerNode(e)}));const t=this.addWorkerNode(e);return this.afterWorkerNodeSetup(t),t}createAndSetupDynamicWorkerNode(){const e=this.createAndSetupWorkerNode();this.registerWorkerMessageListener(e,(e=>{const t=this.getWorkerNodeKeyByWorkerId(e.workerId),s=this.workerNodes[t].usage;(T(S.HARD,e.kill)||T(S.SOFT,e.kill)&&(!1===this.opts.enableTasksQueue&&0===s.tasks.executing||!0===this.opts.enableTasksQueue&&0===s.tasks.executing&&0===this.tasksQueueSize(t)))&&this.destroyWorkerNode(t).catch((e=>{this.emitter?.emit(d.error,e)}))}));const t=this.getWorkerInfo(e);return this.sendToWorker(e,{checkActive:!0,workerId:t.id}),t.dynamic=!0,(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerReady||this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)&&(t.ready=!0),this.checkAndEmitDynamicWorkerCreationEvents(),e}afterWorkerNodeSetup(e){this.registerWorkerMessageListener(e,this.workerListener()),this.sendStartupMessageToWorker(e),this.sendStatisticsMessageToWorker(e),!0===this.opts.enableTasksQueue&&(this.workerNodes[e].onBackPressure=this.tasksStealingOnBackPressure.bind(this))}sendStatisticsMessageToWorker(e){this.sendToWorker(e,{statistics:{runTime:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate,elu:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu.aggregate},workerId:this.getWorkerInfo(e).id})}redistributeQueuedTasks(e){const t=this.workerNodes.filter(((t,s)=>s!==e));for(;this.tasksQueueSize(e)>0;){let s=e,r=1/0,i=!1;for(const[e,o]of t.entries()){if(o.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&(i=!0),o.info.ready&&0===o.usage.tasks.queued){s=e;break}o.info.ready&&o.usage.tasks.queued<r&&(r=o.usage.tasks.queued,s=e)}i?this.executeTask(s,this.dequeueTask(e)):this.enqueueTask(s,this.dequeueTask(e))}}tasksStealingOnBackPressure(e){const t=this.workerNodes[this.getWorkerNodeKeyByWorkerId(e)],s=this.workerNodes.filter((t=>t.info.id!==e)).sort(((e,t)=>e.usage.tasks.queued-t.usage.tasks.queued));for(const[e,r]of s.entries())r.info.ready&&t.usage.tasks.queued>0&&!r.hasBackPressure()&&(r.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency?this.executeTask(e,t.popTask()):this.enqueueTask(e,t.popTask()))}workerListener(){return e=>{this.checkMessageWorkerId(e),null!=e.ready&&null!=e.taskFunctions?this.handleWorkerReadyResponse(e):null!=e.taskId?this.handleTaskExecutionResponse(e):null!=e.taskFunctions&&(this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId)).taskFunctions=e.taskFunctions)}}handleWorkerReadyResponse(e){if(!1===e.ready)throw new Error(`Worker ${e.workerId} failed to initialize`);const t=this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId));t.ready=e.ready,t.taskFunctions=e.taskFunctions,null!=this.emitter&&this.ready&&this.emitter.emit(d.ready,this.info)}handleTaskExecutionResponse(e){const{taskId:t,taskError:s,data:r}=e,i=this.promiseResponseMap.get(t);if(null!=i){null!=s?(this.emitter?.emit(d.taskError,s),i.reject(s.message)):i.resolve(r);const o=i.workerNodeKey;this.afterTaskExecutionHook(o,e),this.promiseResponseMap.delete(t),!0===this.opts.enableTasksQueue&&this.tasksQueueSize(o)>0&&this.workerNodes[o].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&this.executeTask(o,this.dequeueTask(o)),this.workerChoiceStrategyContext.update(o)}}checkAndEmitTaskExecutionEvents(){this.busy&&this.emitter?.emit(d.busy,this.info)}checkAndEmitTaskQueuingEvents(){this.hasBackPressure()&&this.emitter?.emit(d.backPressure,this.info)}checkAndEmitDynamicWorkerCreationEvents(){this.type===k.dynamic&&this.full&&this.emitter?.emit(d.full,this.info)}getWorkerInfo(e){return this.workerNodes[e]?.info}addWorkerNode(e){const t=new U(e,this.worker,this.opts.tasksQueueOptions?.queueMaxSize??Math.pow(this.maxSize,2));this.starting&&(t.info.ready=!0),this.workerNodes.push(t);const s=this.getWorkerNodeKeyByWorker(e);if(-1===s)throw new Error("Worker node added not found");return s}removeWorkerNode(e){const t=this.getWorkerNodeKeyByWorker(e);-1!==t&&(this.workerNodes.splice(t,1),this.workerChoiceStrategyContext.remove(t))}hasWorkerNodeBackPressure(e){return!0===this.opts.enableTasksQueue&&this.workerNodes[e].hasBackPressure()}hasBackPressure(){return!0===this.opts.enableTasksQueue&&-1===this.workerNodes.findIndex((e=>!e.hasBackPressure()))}executeTask(e,t){this.beforeTaskExecutionHook(e,t),this.sendToWorker(e,t,t.transferList),this.checkAndEmitTaskExecutionEvents()}enqueueTask(e,t){const s=this.workerNodes[e].enqueueTask(t);return this.checkAndEmitTaskQueuingEvents(),s}dequeueTask(e){return this.workerNodes[e].dequeueTask()}tasksQueueSize(e){return this.workerNodes[e].tasksQueueSize()}flushTasksQueue(e){for(;this.tasksQueueSize(e)>0;)this.executeTask(e,this.dequeueTask(e));this.workerNodes[e].clearTasksQueue()}flushTasksQueues(){for(const[e]of this.workerNodes.entries())this.flushTasksQueue(e)}}class D extends B{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}setupHook(){s.setupPrimary({...this.opts.settings,exec:this.filePath})}isMain(){return s.isPrimary}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e].worker,s=new Promise((e=>{t.on("exit",(()=>{e()}))}));t.on("disconnect",(()=>{t.kill()})),await this.sendKillMessageToWorker(e,t.id),t.disconnect(),await s}sendToWorker(e,t){this.workerNodes[e].worker.send(t)}sendStartupMessageToWorker(e){this.sendToWorker(e,{ready:!1,workerId:this.workerNodes[e].worker.id})}registerWorkerMessageListener(e,t){this.workerNodes[e].worker.on("message",t)}createWorker(){return s.fork(this.opts.env)}get type(){return k.fixed}get worker(){return A.cluster}get busy(){return this.internalBusy()}}class L extends B{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}isMain(){return t.isMainThread}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e],s=t.worker,r=new Promise((e=>{s.on("exit",(()=>{e()}))}));await this.sendKillMessageToWorker(e,s.threadId),t.closeChannel(),await s.terminate(),await r}sendToWorker(e,t,s){this.workerNodes[e].messageChannel.port1.postMessage(t,s)}sendStartupMessageToWorker(e){const t=this.workerNodes[e].worker,s=this.workerNodes[e].messageChannel.port2;t.postMessage({ready:!1,workerId:t.threadId,port:s},[s])}registerWorkerMessageListener(e,t){this.workerNodes[e].messageChannel.port1.on("message",t)}createWorker(){return new t.Worker(this.filePath,{env:t.SHARE_ENV,...this.opts.workerOptions})}get type(){return k.fixed}get worker(){return A.thread}get busy(){return this.internalBusy()}}const _=6e4,V={killBehavior:S.SOFT,maxInactiveTime:_,killHandler:g};class j extends a.AsyncResource{isMain;mainWorker;opts;taskFunctions;lastTaskTimestamp;statistics;activeInterval;constructor(e,t,s,r,i=V){super(e),this.isMain=t,this.mainWorker=s,this.opts=i,this.checkWorkerOptions(this.opts),this.checkTaskFunctions(r),this.isMain||this.getMainWorker()?.on("message",this.handleReadyMessage.bind(this))}checkWorkerOptions(e){this.opts={...V,...e},delete this.opts.async}checkTaskFunctions(e){if(null==e)throw new Error("taskFunctions parameter is mandatory");if(this.taskFunctions=new Map,"function"==typeof e){const t=e.bind(this);this.taskFunctions.set(l,t),this.taskFunctions.set("string"==typeof e.name&&e.name.trim().length>0?e.name:"fn1",t)}else{if(!f(e))throw new TypeError("taskFunctions parameter is not a function or a plain object");{let t=!0;for(const[s,r]of Object.entries(e)){if("string"!=typeof s)throw new TypeError("A taskFunctions parameter object key is not a string");if("string"==typeof s&&0===s.trim().length)throw new TypeError("A taskFunctions parameter object key an empty string");if("function"!=typeof r)throw new TypeError("A taskFunctions parameter object value is not a function");const e=r.bind(this);t&&(this.taskFunctions.set(l,e),t=!1),this.taskFunctions.set(s,e)}if(t)throw new Error("taskFunctions parameter object is empty")}}}hasTaskFunction(e){return this.checkTaskFunctionName(e),this.taskFunctions.has(e)}addTaskFunction(e,t){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot add a task function with the default reserved name");if("function"!=typeof t)throw new TypeError("fn parameter is not a function");try{const s=t.bind(this);return this.taskFunctions.get(e)===this.taskFunctions.get(l)&&this.taskFunctions.set(l,s),this.taskFunctions.set(e,s),this.sendTaskFunctionsListToMainWorker(),!0}catch{return!1}}removeTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot remove the task function with the default reserved name");if(this.taskFunctions.get(e)===this.taskFunctions.get(l))throw new Error("Cannot remove the task function used as the default task function");const t=this.taskFunctions.delete(e);return this.sendTaskFunctionsListToMainWorker(),t}listTaskFunctions(){const e=[...this.taskFunctions.keys()];let t=l;for(const[e,s]of this.taskFunctions)if(e!==l&&s===this.taskFunctions.get(l)){t=e;break}return[e[e.indexOf(l)],t,...e.filter((e=>e!==l&&e!==t))]}setDefaultTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot set the default task function reserved name as the default task function");if(!this.taskFunctions.has(e))throw new Error("Cannot set the default task function to a non-existing task function");try{return this.taskFunctions.set(l,this.taskFunctions.get(e)),!0}catch{return!1}}checkTaskFunctionName(e){if("string"!=typeof e)throw new TypeError("name parameter is not a string");if("string"==typeof e&&0===e.trim().length)throw new TypeError("name parameter is an empty string")}messageListener(e){this.checkMessageWorkerId(e),null!=e.statistics?this.statistics=e.statistics:null!=e.checkActive?e.checkActive?this.startCheckActive():this.stopCheckActive():null!=e.taskId&&null!=e.data?this.run(e):!0===e.kill&&this.handleKillMessage(e)}handleKillMessage(e){if(this.stopCheckActive(),W(this.opts.killHandler))(this.opts.killHandler?.()).then((()=>(this.sendToMainWorker({kill:"success",workerId:this.id}),null))).catch((()=>{this.sendToMainWorker({kill:"failure",workerId:this.id})})).finally((()=>{this.emitDestroy()})).catch(g);else try{this.opts.killHandler?.(),this.sendToMainWorker({kill:"success",workerId:this.id})}catch{this.sendToMainWorker({kill:"failure",workerId:this.id})}finally{this.emitDestroy()}}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Message worker id is not set");if(null!=e.workerId&&e.workerId!==this.id)throw new Error(`Message worker id ${e.workerId} does not match the worker id ${this.id}`)}startCheckActive(){this.lastTaskTimestamp=i.performance.now(),this.activeInterval=setInterval(this.checkActive.bind(this),(this.opts.maxInactiveTime??_)/2)}stopCheckActive(){null!=this.activeInterval&&(clearInterval(this.activeInterval),delete this.activeInterval)}checkActive(){i.performance.now()-this.lastTaskTimestamp>(this.opts.maxInactiveTime??_)&&this.sendToMainWorker({kill:this.opts.killBehavior,workerId:this.id})}getMainWorker(){if(null==this.mainWorker)throw new Error("Main worker not set");return this.mainWorker}sendTaskFunctionsListToMainWorker(){this.sendToMainWorker({taskFunctions:this.listTaskFunctions(),workerId:this.id})}handleError(e){return e instanceof Error?e.message:e}run(e){const t=this.getTaskFunction(e.name);W(t)?this.runInAsyncScope(this.runAsync.bind(this),this,t,e):this.runInAsyncScope(this.runSync.bind(this),this,t,e)}runSync(e,t){const{name:s,taskId:r,data:i}=t;try{let t=this.beginTaskPerformance(s);const o=e(i);t=this.endTaskPerformance(t),this.sendToMainWorker({data:o,taskPerformance:t,workerId:this.id,taskId:r})}catch(e){const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s,message:t,data:i},workerId:this.id,taskId:r})}finally{this.updateLastTaskTimestamp()}}runAsync(e,t){const{name:s,taskId:r,data:i}=t;let o=this.beginTaskPerformance(s);e(i).then((e=>(o=this.endTaskPerformance(o),this.sendToMainWorker({data:e,taskPerformance:o,workerId:this.id,taskId:r}),null))).catch((e=>{const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s,message:t,data:i},workerId:this.id,taskId:r})})).finally((()=>{this.updateLastTaskTimestamp()})).catch(g)}getTaskFunction(e){e=e??l;const t=this.taskFunctions.get(e);if(null==t)throw new Error(`Task function '${e}' not found`);return t}beginTaskPerformance(e){return this.checkStatistics(),{name:e??l,timestamp:i.performance.now(),...this.statistics.elu&&{elu:i.performance.eventLoopUtilization()}}}endTaskPerformance(e){return this.checkStatistics(),{...e,...this.statistics.runTime&&{runTime:i.performance.now()-e.timestamp},...this.statistics.elu&&{elu:i.performance.eventLoopUtilization(e.elu)}}}checkStatistics(){if(null==this.statistics)throw new Error("Performance statistics computation requirements not set")}updateLastTaskTimestamp(){null!=this.activeInterval&&(this.lastTaskTimestamp=i.performance.now())}}exports.ClusterWorker=class extends j{constructor(e,t={}){super("worker-cluster-pool:poolifier",s.isPrimary,s.worker,e,t)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready)try{this.getMainWorker()?.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}get id(){return this.getMainWorker().id}sendToMainWorker(e){this.getMainWorker().send(e)}},exports.DynamicClusterPool=class extends D{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.DynamicThreadPool=class extends L{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.FixedClusterPool=D,exports.FixedThreadPool=L,exports.KillBehaviors=S,exports.Measurements=v,exports.PoolEvents=d,exports.PoolTypes=k,exports.ThreadWorker=class extends j{port;constructor(e,s={}){super("worker-thread-pool:poolifier",t.isMainThread,t.parentPort,e,s)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready&&null!=e.port)try{this.port=e.port,this.port.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}handleKillMessage(e){super.handleKillMessage(e),this.port?.unref(),this.port?.close()}get id(){return t.threadId}sendToMainWorker(e){this.port.postMessage(e)}handleError(e){return e}},exports.WorkerChoiceStrategies=E,exports.WorkerTypes=A,exports.availableParallelism=()=>{let e=1;try{e=u.availableParallelism()}catch{const t=u.cpus();Array.isArray(t)&&t.length>0&&(e=t.length)}return e};

lib/index.d.ts

@@ -21,3 +21,3 @@ export type { AbstractPool } from './pools/abstract-pool';
 export type { CircularArray } from './circular-array';
-export type { Queue } from './queue';
+export type { Deque } from './deque';
 export { availableParallelism } from './utils';

lib/index.js

@@ -1,1 +0,1 @@
-"use strict";var e=require("node:events"),t=require("node:worker_threads"),s=require("node:cluster"),r=require("node:crypto"),i=require("node:perf_hooks"),o=require("node:fs"),n=require("node:os"),a=require("node:async_hooks");function h(e){var t=Object.create(null);return e&&Object.keys(e).forEach((function(s){if("default"!==s){var r=Object.getOwnPropertyDescriptor(e,s);Object.defineProperty(t,s,r.get?r:{enumerable:!0,get:function(){return e[s]}})}})),t.default=e,Object.freeze(t)}var u=h(n);const k=Object.freeze({fixed:"fixed",dynamic:"dynamic"});class c extends e.EventEmitter{}const d=Object.freeze({ready:"ready",busy:"busy",full:"full",destroy:"destroy",error:"error",taskError:"taskError",backPressure:"backPressure"}),l="default",g=Object.freeze((()=>{})),m={choiceRetries:6,runTime:{median:!1},waitTime:{median:!1},elu:{median:!1}},p={aggregate:!1,average:!1,median:!1},w=e=>{if(Array.isArray(e)&&0===e.length)return 0;if(Array.isArray(e)&&1===e.length)return e[0];const t=e.slice().sort(((e,t)=>e-t));return(t[t.length-1>>1]+t[t.length>>1])/2},y=(e,t=2)=>{const s=Math.pow(10,t);return Math.round(e*s*(1+Number.EPSILON))/s},f=e=>"object"==typeof e&&null!==e&&e?.constructor===Object&&"[object Object]"===Object.prototype.toString.call(e),T=(e,t)=>t===e,W=e=>"function"==typeof e&&"AsyncFunction"===e.constructor.name,N=(e,t,s,r)=>{t.aggregate&&(e.aggregate=(e.aggregate??0)+s,e.minimum=Math.min(s,e.minimum??1/0),e.maximum=Math.max(s,e.maximum??-1/0),t.average&&0!==r&&(e.average=e.aggregate/r),t.median&&null!=s&&(e.history.push(s),e.median=w(e.history)))},x=Object.freeze({SOFT:"SOFT",HARD:"HARD"}),S=Object.freeze({ROUND_ROBIN:"ROUND_ROBIN",LEAST_USED:"LEAST_USED",LEAST_BUSY:"LEAST_BUSY",LEAST_ELU:"LEAST_ELU",FAIR_SHARE:"FAIR_SHARE",WEIGHTED_ROUND_ROBIN:"WEIGHTED_ROUND_ROBIN",INTERLEAVED_WEIGHTED_ROUND_ROBIN:"INTERLEAVED_WEIGHTED_ROUND_ROBIN"}),E=Object.freeze({runTime:"runTime",waitTime:"waitTime",elu:"elu"});class b{pool;opts;nextWorkerNodeKey=0;previousWorkerNodeKey=0;strategyPolicy={dynamicWorkerUsage:!1,dynamicWorkerReady:!0};taskStatisticsRequirements={runTime:p,waitTime:p,elu:p};constructor(e,t=m){this.pool=e,this.opts=t,this.opts={...m,...t},this.choose=this.choose.bind(this)}setTaskStatisticsRequirements(e){this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.runTime,e.runTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.waitTime,e.waitTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.elu,e.elu?.median)}toggleMedianMeasurementStatisticsRequirements(e,t){e.average&&t&&(e.average=!1,e.median=t),e.median&&!t&&(e.average=!0,e.median=t)}resetWorkerNodeKeyProperties(){this.nextWorkerNodeKey=0,this.previousWorkerNodeKey=0}setOptions(e){this.opts={...m,...e},this.setTaskStatisticsRequirements(this.opts)}isWorkerNodeReady(e){return this.pool.workerNodes[e].info.ready}hasWorkerNodeBackPressure(e){return this.pool.hasWorkerNodeBackPressure(e)}isWorkerNodeEligible(e){return this.isWorkerNodeReady(e)&&!this.hasWorkerNodeBackPressure(e)}getWorkerTaskRunTime(e){return this.taskStatisticsRequirements.runTime.median?this.pool.workerNodes[e].usage.runTime?.median??0:this.pool.workerNodes[e].usage.runTime?.average??0}getWorkerTaskWaitTime(e){return this.taskStatisticsRequirements.waitTime.median?this.pool.workerNodes[e].usage.waitTime?.median??0:this.pool.workerNodes[e].usage.waitTime?.average??0}getWorkerTaskElu(e){return this.taskStatisticsRequirements.elu.median?this.pool.workerNodes[e].usage.elu.active?.median??0:this.pool.workerNodes[e].usage.elu.active?.average??0}checkNextWorkerNodeEligibility(e){this.isWorkerNodeEligible(this.nextWorkerNodeKey)||(this.nextWorkerNodeKey=void 0,this.previousWorkerNodeKey=e??this.previousWorkerNodeKey)}computeDefaultWorkerWeight(){let e=0;for(const t of n.cpus()){const s=t.speed.toString().length-1;e+=1/(t.speed/Math.pow(10,s))*Math.pow(10,s)}return Math.round(e/n.cpus().length)}}class I extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:{aggregate:!0,average:!0,median:!1}};workersVirtualTaskEndTimestamp=[];constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.workersVirtualTaskEndTimestamp=[],!0}update(e){return this.computeWorkerVirtualTaskEndTimestamp(e),!0}choose(){return this.nextWorkerNodeKey=this.fairShareNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(e){return this.workersVirtualTaskEndTimestamp.splice(e,1),!0}fairShareNextWorkerNodeKey(){let e,t=1/0;for(const[s]of this.pool.workerNodes.entries()){null==this.workersVirtualTaskEndTimestamp[s]&&this.computeWorkerVirtualTaskEndTimestamp(s);const r=this.workersVirtualTaskEndTimestamp[s];this.isWorkerNodeEligible(s)&&r<t&&(t=r,e=s)}return e}computeWorkerVirtualTaskEndTimestamp(e){this.workersVirtualTaskEndTimestamp[e]=this.getWorkerVirtualTaskEndTimestamp(e,this.getWorkerVirtualTaskStartTimestamp(e))}getWorkerVirtualTaskEndTimestamp(e,t){return t+(this.opts.measurement===E.elu?this.getWorkerTaskElu(e):this.getWorkerTaskRunTime(e))}getWorkerVirtualTaskStartTimestamp(e){return Math.max(performance.now(),this.workersVirtualTaskEndTimestamp[e]??-1/0)}}class C extends b{roundId=0;roundWeights;defaultWorkerWeight;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight(),this.roundWeights=this.getRoundWeights()}reset(){return this.resetWorkerNodeKeyProperties(),this.roundId=0,!0}update(){return!0}choose(){let e,t=this.roundId;for(let s=this.roundId;s<this.roundWeights.length;s++){t=s;for(let t=this.nextWorkerNodeKey??this.previousWorkerNodeKey;t<this.pool.workerNodes.length;t++){const r=this.opts.weights?.[t]??this.defaultWorkerWeight;if(this.isWorkerNodeEligible(t)&&r>=this.roundWeights[s]){e=t;break}}}this.roundId=t,null==e&&(this.previousWorkerNodeKey=this.nextWorkerNodeKey??this.previousWorkerNodeKey),this.nextWorkerNodeKey=e;const s=this.nextWorkerNodeKey;return this.nextWorkerNodeKey===this.pool.workerNodes.length-1?(this.nextWorkerNodeKey=0,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1):this.nextWorkerNodeKey=(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,s}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1)),!0}setOptions(e){super.setOptions(e),this.roundWeights=this.getRoundWeights()}getRoundWeights(){return null==this.opts.weights?[this.defaultWorkerWeight]:[...new Set(Object.values(this.opts.weights).slice().sort(((e,t)=>e-t)))]}}class v extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!1,median:!1},waitTime:{aggregate:!0,average:!1,median:!1},elu:p};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastBusyNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastBusyNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=(r.usage.runTime?.aggregate??0)+(r.usage.waitTime?.aggregate??0);if(this.isWorkerNodeEligible(s)&&0===i){e=s;break}this.isWorkerNodeEligible(s)&&i<t&&(t=i,e=s)}return e}}class R extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastUsedNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastUsedNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage.tasks,o=i.executed+i.executing+i.queued;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class O extends b{taskStatisticsRequirements={runTime:p,waitTime:p,elu:{aggregate:!0,average:!1,median:!1}};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastEluNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastEluNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage,o=i.elu?.active?.aggregate??0;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class F extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.resetWorkerNodeKeyProperties(),!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.roundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1)),!0}roundRobinNextWorkerNodeKey(){return this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.nextWorkerNodeKey}}class z extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:p};defaultWorkerWeight;workerVirtualTaskRunTime=0;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight()}reset(){return this.resetWorkerNodeKeyProperties(),this.workerVirtualTaskRunTime=0,!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.weightedRoundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1),this.workerVirtualTaskRunTime=0),!0}weightedRoundRobinNextWorkerNodeKey(){const e=this.workerVirtualTaskRunTime;return e<(this.opts.weights?.[this.nextWorkerNodeKey??this.previousWorkerNodeKey]??this.defaultWorkerWeight)?this.workerVirtualTaskRunTime=e+this.getWorkerTaskRunTime(this.nextWorkerNodeKey??this.previousWorkerNodeKey):(this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.workerVirtualTaskRunTime=0),this.nextWorkerNodeKey}}class M{workerChoiceStrategy;opts;workerChoiceStrategies;choiceRetriesCount=0;constructor(e,t=S.ROUND_ROBIN,s=m){this.workerChoiceStrategy=t,this.opts=s,this.opts={...m,...s},this.execute=this.execute.bind(this),this.workerChoiceStrategies=new Map([[S.ROUND_ROBIN,new(F.bind(this))(e,s)],[S.LEAST_USED,new(R.bind(this))(e,s)],[S.LEAST_BUSY,new(v.bind(this))(e,s)],[S.LEAST_ELU,new(O.bind(this))(e,s)],[S.FAIR_SHARE,new(I.bind(this))(e,s)],[S.WEIGHTED_ROUND_ROBIN,new(z.bind(this))(e,s)],[S.INTERLEAVED_WEIGHTED_ROUND_ROBIN,new(C.bind(this))(e,s)]])}getStrategyPolicy(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).strategyPolicy}getTaskStatisticsRequirements(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).taskStatisticsRequirements}setWorkerChoiceStrategy(e){this.workerChoiceStrategy!==e&&(this.workerChoiceStrategy=e),this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset()}update(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).update(e)}execute(){const e=this.workerChoiceStrategies.get(this.workerChoiceStrategy).choose();if(null==e&&this.choiceRetriesCount<this.opts.choiceRetries)return this.choiceRetriesCount++,this.execute();if(null==e)throw new Error(`Worker node key chosen is null or undefined after ${this.choiceRetriesCount} retries`);return this.choiceRetriesCount=0,e}remove(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).remove(e)}setOptions(e){this.opts={...m,...e};for(const t of this.workerChoiceStrategies.values())t.setOptions(e)}}class K extends Array{size;constructor(e=1024,...t){super(),this.checkSize(e),this.size=e,arguments.length>1&&this.push(...t)}push(...e){const t=super.push(...e);return t>this.size&&super.splice(0,t-this.size),this.length}unshift(...e){return super.unshift(...e)>this.size&&super.splice(this.size,e.length),this.length}concat(...e){const t=super.concat(e);return t.size=this.size,t.length>t.size&&t.splice(0,t.length-t.size),t}splice(e,t,...s){let r=[];if(arguments.length>=3&&null!=t){if(r=super.splice(e,t,...s),this.length>this.size){const e=super.splice(0,this.length-this.size);r=new K(r.length+e.length,...r,...e)}}else r=2===arguments.length?super.splice(e,t):super.splice(e);return r}resize(e){if(this.checkSize(e),0===e)this.length=0;else if(e<this.size)for(let t=e;t<this.size;t++)super.pop();this.size=e}empty(){return 0===this.length}full(){return this.length===this.size}checkSize(e){if(!Number.isSafeInteger(e))throw new TypeError(`Invalid circular array size: ${e} is not a safe integer`);if(e<0)throw new RangeError(`Invalid circular array size: ${e} < 0`)}}class P{items;offset;size;maxSize;constructor(){this.clear()}enqueue(e){return this.items.push(e),++this.size,this.size>this.maxSize&&(this.maxSize=this.size),this.size}dequeue(){if(this.size<=0)return;const e=this.items[this.offset];return 2*++this.offset>=this.items.length&&(this.items=this.items.slice(this.offset),this.offset=0),--this.size,e}peek(){if(!(this.size<=0))return this.items[this.offset]}clear(){this.items=[],this.offset=0,this.size=0,this.maxSize=0}[Symbol.iterator](){const e=this.items;let t=this.offset;return{next:()=>{if(t>=e.length)return{value:void 0,done:!0};const s=e[t];return++t,{value:s,done:!1}}}}}const q=Object.freeze({thread:"thread",cluster:"cluster"});class Q{worker;info;messageChannel;usage;taskFunctionsUsage;tasksQueue;tasksQueueBackPressureSize;constructor(e,s,r){if(null==e)throw new TypeError("Cannot construct a worker node without a worker");if(null==s)throw new TypeError("Cannot construct a worker node without a worker type");if(null==r)throw new TypeError("Cannot construct a worker node without a pool maximum size");if(!Number.isSafeInteger(r))throw new TypeError("Cannot construct a worker node with a pool maximum size that is not an integer");this.worker=e,this.info=this.initWorkerInfo(e,s),s===q.thread&&(this.messageChannel=new t.MessageChannel),this.usage=this.initWorkerUsage(),this.taskFunctionsUsage=new Map,this.tasksQueue=new P,this.tasksQueueBackPressureSize=Math.pow(r,2)}tasksQueueSize(){return this.tasksQueue.size}tasksQueueMaxSize(){return this.tasksQueue.maxSize}enqueueTask(e){return this.tasksQueue.enqueue(e)}dequeueTask(){return this.tasksQueue.dequeue()}clearTasksQueue(){this.tasksQueue.clear()}hasBackPressure(){return this.tasksQueue.size>=this.tasksQueueBackPressureSize}resetUsage(){this.usage=this.initWorkerUsage(),this.taskFunctionsUsage.clear()}closeChannel(){null!=this.messageChannel&&(this.messageChannel?.port1.unref(),this.messageChannel?.port2.unref(),this.messageChannel?.port1.close(),this.messageChannel?.port2.close(),delete this.messageChannel)}getTaskFunctionWorkerUsage(e){if(!Array.isArray(this.info.taskFunctions))throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list is not yet defined`);if(Array.isArray(this.info.taskFunctions)&&this.info.taskFunctions.length<3)throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list has less than 3 elements`);return e===l&&(e=this.info.taskFunctions[1]),this.taskFunctionsUsage.has(e)||this.taskFunctionsUsage.set(e,this.initTaskFunctionWorkerUsage(e)),this.taskFunctionsUsage.get(e)}initWorkerInfo(e,t){return{id:this.getWorkerId(e,t),type:t,dynamic:!1,ready:!1}}initWorkerUsage(){const e=()=>this.tasksQueueSize(),t=()=>this.tasksQueueMaxSize();return{tasks:{executed:0,executing:0,get queued(){return e()},get maxQueued(){return t()},failed:0},runTime:{history:new K},waitTime:{history:new K},elu:{idle:{history:new K},active:{history:new K}}}}initTaskFunctionWorkerUsage(e){const t=()=>{let t=0;for(const s of this.tasksQueue)(s.name===l&&e===this.info.taskFunctions[1]||s.name!==l&&e===s.name)&&++t;return t};return{tasks:{executed:0,executing:0,get queued(){return t()},failed:0},runTime:{history:new K},waitTime:{history:new K},elu:{idle:{history:new K},active:{history:new K}}}}getWorkerId(e,t){return t===q.thread?e.threadId:t===q.cluster?e.id:void 0}}class A{numberOfWorkers;filePath;opts;workerNodes=[];emitter;promiseResponseMap=new Map;workerChoiceStrategyContext;max;starting;startTimestamp;constructor(e,t,s){if(this.numberOfWorkers=e,this.filePath=t,this.opts=s,!this.isMain())throw new Error("Cannot start a pool from a worker with the same type as the pool");this.checkNumberOfWorkers(this.numberOfWorkers),this.checkFilePath(this.filePath),this.checkPoolOptions(this.opts),this.chooseWorkerNode=this.chooseWorkerNode.bind(this),this.executeTask=this.executeTask.bind(this),this.enqueueTask=this.enqueueTask.bind(this),!0===this.opts.enableEvents&&(this.emitter=new c),this.workerChoiceStrategyContext=new M(this,this.opts.workerChoiceStrategy,this.opts.workerChoiceStrategyOptions),this.setupHook(),this.starting=!0,this.startPool(),this.starting=!1,this.startTimestamp=i.performance.now()}checkFilePath(e){if(null==e||"string"!=typeof e||"string"==typeof e&&0===e.trim().length)throw new Error("Please specify a file with a worker implementation");if(!o.existsSync(e))throw new Error(`Cannot find the worker file '${e}'`)}checkNumberOfWorkers(e){if(null==e)throw new Error("Cannot instantiate a pool without specifying the number of workers");if(!Number.isSafeInteger(e))throw new TypeError("Cannot instantiate a pool with a non safe integer number of workers");if(e<0)throw new RangeError("Cannot instantiate a pool with a negative number of workers");if(this.type===k.fixed&&0===e)throw new RangeError("Cannot instantiate a fixed pool with zero worker")}checkDynamicPoolSize(e,t){if(this.type===k.dynamic){if(null==t)throw new TypeError("Cannot instantiate a dynamic pool without specifying the maximum pool size");if(!Number.isSafeInteger(t))throw new TypeError("Cannot instantiate a dynamic pool with a non safe integer maximum pool size");if(e>t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size inferior to the minimum pool size");if(0===t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size equal to zero");if(e===t)throw new RangeError("Cannot instantiate a dynamic pool with a minimum pool size equal to the maximum pool size. Use a fixed pool instead")}}checkPoolOptions(e){if(!f(e))throw new TypeError("Invalid pool options: must be a plain object");this.opts.workerChoiceStrategy=e.workerChoiceStrategy??S.ROUND_ROBIN,this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy),this.opts.workerChoiceStrategyOptions={...m,...e.workerChoiceStrategyOptions},this.checkValidWorkerChoiceStrategyOptions(this.opts.workerChoiceStrategyOptions),this.opts.restartWorkerOnError=e.restartWorkerOnError??!0,this.opts.enableEvents=e.enableEvents??!0,this.opts.enableTasksQueue=e.enableTasksQueue??!1,this.opts.enableTasksQueue&&(this.checkValidTasksQueueOptions(e.tasksQueueOptions),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e.tasksQueueOptions))}checkValidWorkerChoiceStrategy(e){if(!Object.values(S).includes(e))throw new Error(`Invalid worker choice strategy '${e}'`)}checkValidWorkerChoiceStrategyOptions(e){if(!f(e))throw new TypeError("Invalid worker choice strategy options: must be a plain object");if(null!=e.choiceRetries&&!Number.isSafeInteger(e.choiceRetries))throw new TypeError("Invalid worker choice strategy options: choice retries must be an integer");if(null!=e.choiceRetries&&e.choiceRetries<=0)throw new RangeError(`Invalid worker choice strategy options: choice retries '${e.choiceRetries}' must be greater than zero`);if(null!=e.weights&&Object.keys(e.weights).length!==this.maxSize)throw new Error("Invalid worker choice strategy options: must have a weight for each worker node");if(null!=e.measurement&&!Object.values(E).includes(e.measurement))throw new Error(`Invalid worker choice strategy options: invalid measurement '${e.measurement}'`)}checkValidTasksQueueOptions(e){if(null!=e&&!f(e))throw new TypeError("Invalid tasks queue options: must be a plain object");if(null!=e?.concurrency&&!Number.isSafeInteger(e.concurrency))throw new TypeError("Invalid worker tasks concurrency: must be an integer");if(null!=e?.concurrency&&e.concurrency<=0)throw new RangeError(`Invalid worker tasks concurrency: ${e.concurrency} is a negative integer or zero`)}startPool(){for(;this.workerNodes.reduce(((e,t)=>t.info.dynamic?e:e+1),0)<this.numberOfWorkers;)this.createAndSetupWorkerNode()}get info(){return{version:"2.6.31",type:this.type,worker:this.worker,ready:this.ready,strategy:this.opts.workerChoiceStrategy,minSize:this.minSize,maxSize:this.maxSize,...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{utilization:y(this.utilization)},workerNodes:this.workerNodes.length,idleWorkerNodes:this.workerNodes.reduce(((e,t)=>0===t.usage.tasks.executing?e+1:e),0),busyWorkerNodes:this.workerNodes.reduce(((e,t)=>t.usage.tasks.executing>0?e+1:e),0),executedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executed),0),executingTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executing),0),...!0===this.opts.enableTasksQueue&&{queuedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.queued),0)},...!0===this.opts.enableTasksQueue&&{maxQueuedTasks:this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.maxQueued??0)),0)},...!0===this.opts.enableTasksQueue&&{backPressure:this.hasBackPressure()},failedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.failed),0),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&{runTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.runTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.runTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.runTime?.median??0))))}}},...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{waitTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.waitTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.waitTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.waitTime?.median??0))))}}}}}get ready(){return this.workerNodes.reduce(((e,t)=>!t.info.dynamic&&t.info.ready?e+1:e),0)>=this.minSize}get utilization(){const e=(i.performance.now()-this.startTimestamp)*this.maxSize;return(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)+this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0))/e}get minSize(){return this.numberOfWorkers}get maxSize(){return this.max??this.numberOfWorkers}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Worker message received without worker id");if(null!=e.workerId&&-1===this.getWorkerNodeKeyByWorkerId(e.workerId))throw new Error(`Worker message received from unknown worker '${e.workerId}'`)}getWorkerNodeKeyByWorker(e){return this.workerNodes.findIndex((t=>t.worker===e))}getWorkerNodeKeyByWorkerId(e){return this.workerNodes.findIndex((t=>t.info.id===e))}setWorkerChoiceStrategy(e,t){this.checkValidWorkerChoiceStrategy(e),this.opts.workerChoiceStrategy=e,this.workerChoiceStrategyContext.setWorkerChoiceStrategy(this.opts.workerChoiceStrategy),null!=t&&this.setWorkerChoiceStrategyOptions(t);for(const[e,t]of this.workerNodes.entries())t.resetUsage(),this.sendStatisticsMessageToWorker(e)}setWorkerChoiceStrategyOptions(e){this.checkValidWorkerChoiceStrategyOptions(e),this.opts.workerChoiceStrategyOptions={...m,...e},this.workerChoiceStrategyContext.setOptions(this.opts.workerChoiceStrategyOptions)}enableTasksQueue(e,t){!0!==this.opts.enableTasksQueue||e||this.flushTasksQueues(),this.opts.enableTasksQueue=e,this.setTasksQueueOptions(t)}setTasksQueueOptions(e){!0===this.opts.enableTasksQueue?(this.checkValidTasksQueueOptions(e),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e)):null!=this.opts.tasksQueueOptions&&delete this.opts.tasksQueueOptions}buildTasksQueueOptions(e){return{concurrency:e?.concurrency??1}}get full(){return this.workerNodes.length>=this.maxSize}internalBusy(){return!0===this.opts.enableTasksQueue?-1===this.workerNodes.findIndex((e=>e.info.ready&&e.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency)):-1===this.workerNodes.findIndex((e=>e.info.ready&&0===e.usage.tasks.executing))}listTaskFunctions(){for(const e of this.workerNodes)if(Array.isArray(e.info.taskFunctions)&&e.info.taskFunctions.length>0)return e.info.taskFunctions;return[]}async execute(e,t,s){return await new Promise(((o,n)=>{null!=t&&"string"!=typeof t&&n(new TypeError("name argument must be a string")),null!=t&&"string"==typeof t&&0===t.trim().length&&n(new TypeError("name argument must not be an empty string")),null==s||Array.isArray(s)||n(new TypeError("transferList argument must be an array"));const a=i.performance.now(),h=this.chooseWorkerNode(),u=this.getWorkerInfo(h);null!=t&&Array.isArray(u.taskFunctions)&&!u.taskFunctions.includes(t)&&n(new Error(`Task function '${t}' is not registered in the pool`));const k={name:t??l,data:e??{},transferList:s,timestamp:a,workerId:u.id,taskId:r.randomUUID()};this.promiseResponseMap.set(k.taskId,{resolve:o,reject:n,workerNodeKey:h}),!1===this.opts.enableTasksQueue||!0===this.opts.enableTasksQueue&&this.workerNodes[h].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency?this.executeTask(h,k):this.enqueueTask(h,k)}))}async destroy(){await Promise.all(this.workerNodes.map((async(e,t)=>{await this.destroyWorkerNode(t)}))),this.emitter?.emit(d.destroy,this.info)}async sendKillMessageToWorker(e,t){await new Promise(((s,r)=>{this.registerWorkerMessageListener(e,(e=>{"success"===e.kill?s():"failure"===e.kill&&r(new Error(`Worker ${t} kill message handling failed`))})),this.sendToWorker(e,{kill:!0,workerId:t})}))}setupHook(){}beforeTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name);++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}}afterTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name??l);this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}}shallUpdateTaskFunctionWorkerUsage(e){const t=this.getWorkerInfo(e);return null!=t&&Array.isArray(t.taskFunctions)&&t.taskFunctions.length>2}updateTaskStatisticsWorkerUsage(e,t){const s=e.tasks;if(null!=s.executing&&s.executing>0)--s.executing;else if(null!=s.executing&&s.executing<0)throw new Error("Worker usage statistic for tasks executing cannot be negative");null==t.taskError?++s.executed:++s.failed}updateRunTimeWorkerUsage(e,t){N(e.runTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime,t.taskPerformance?.runTime??0,e.tasks.executed)}updateWaitTimeWorkerUsage(e,t){const s=i.performance.now(),r=s-(t.timestamp??s);N(e.waitTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime,r,e.tasks.executed)}updateEluWorkerUsage(e,t){const s=this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu;N(e.elu.active,s,t.taskPerformance?.elu?.active??0,e.tasks.executed),N(e.elu.idle,s,t.taskPerformance?.elu?.idle??0,e.tasks.executed),s.aggregate&&null!=t.taskPerformance?.elu&&(null!=e.elu.utilization?e.elu.utilization=(e.elu.utilization+t.taskPerformance.elu.utilization)/2:e.elu.utilization=t.taskPerformance.elu.utilization)}chooseWorkerNode(){if(this.shallCreateDynamicWorker()){const e=this.createAndSetupDynamicWorkerNode();if(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)return e}return this.workerChoiceStrategyContext.execute()}shallCreateDynamicWorker(){return this.type===k.dynamic&&!this.full&&this.internalBusy()}createAndSetupWorkerNode(){const e=this.createWorker();e.on("online",this.opts.onlineHandler??g),e.on("message",this.opts.messageHandler??g),e.on("error",this.opts.errorHandler??g),e.on("error",(t=>{const s=this.getWorkerNodeKeyByWorker(e),r=this.getWorkerInfo(s);r.ready=!1,this.workerNodes[s].closeChannel(),this.emitter?.emit(d.error,t),!0!==this.opts.restartWorkerOnError||this.starting||(r.dynamic?this.createAndSetupDynamicWorkerNode():this.createAndSetupWorkerNode()),!0===this.opts.enableTasksQueue&&this.redistributeQueuedTasks(s)})),e.on("exit",this.opts.exitHandler??g),e.once("exit",(()=>{this.removeWorkerNode(e)}));const t=this.addWorkerNode(e);return this.afterWorkerNodeSetup(t),t}createAndSetupDynamicWorkerNode(){const e=this.createAndSetupWorkerNode();this.registerWorkerMessageListener(e,(e=>{const t=this.getWorkerNodeKeyByWorkerId(e.workerId),s=this.workerNodes[t].usage;(T(x.HARD,e.kill)||T(x.SOFT,e.kill)&&(!1===this.opts.enableTasksQueue&&0===s.tasks.executing||!0===this.opts.enableTasksQueue&&0===s.tasks.executing&&0===this.tasksQueueSize(t)))&&this.destroyWorkerNode(t).catch((e=>{this.emitter?.emit(d.error,e)}))}));const t=this.getWorkerInfo(e);return this.sendToWorker(e,{checkActive:!0,workerId:t.id}),t.dynamic=!0,(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerReady||this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)&&(t.ready=!0),this.checkAndEmitDynamicWorkerCreationEvents(),e}afterWorkerNodeSetup(e){this.registerWorkerMessageListener(e,this.workerListener()),this.sendStartupMessageToWorker(e),this.sendStatisticsMessageToWorker(e)}sendStatisticsMessageToWorker(e){this.sendToWorker(e,{statistics:{runTime:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate,elu:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu.aggregate},workerId:this.getWorkerInfo(e).id})}redistributeQueuedTasks(e){for(;this.tasksQueueSize(e)>0;){let t=e,s=1/0,r=!1;for(const[i,o]of this.workerNodes.entries()){const n=this.getWorkerInfo(i);if(i!==e&&n.ready&&0===o.usage.tasks.queued){this.workerNodes[i].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&(r=!0),t=i;break}i!==e&&n.ready&&o.usage.tasks.queued<s&&(s=o.usage.tasks.queued,t=i)}r?this.executeTask(t,this.dequeueTask(e)):this.enqueueTask(t,this.dequeueTask(e))}}workerListener(){return e=>{this.checkMessageWorkerId(e),null!=e.ready&&null!=e.taskFunctions?this.handleWorkerReadyResponse(e):null!=e.taskId?this.handleTaskExecutionResponse(e):null!=e.taskFunctions&&(this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId)).taskFunctions=e.taskFunctions)}}handleWorkerReadyResponse(e){if(!1===e.ready)throw new Error(`Worker ${e.workerId} failed to initialize`);const t=this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId));t.ready=e.ready,t.taskFunctions=e.taskFunctions,null!=this.emitter&&this.ready&&this.emitter.emit(d.ready,this.info)}handleTaskExecutionResponse(e){const{taskId:t,taskError:s,data:r}=e,i=this.promiseResponseMap.get(t);if(null!=i){null!=s?(this.emitter?.emit(d.taskError,s),i.reject(s.message)):i.resolve(r);const o=i.workerNodeKey;this.afterTaskExecutionHook(o,e),this.promiseResponseMap.delete(t),!0===this.opts.enableTasksQueue&&this.tasksQueueSize(o)>0&&this.workerNodes[o].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&this.executeTask(o,this.dequeueTask(o)),this.workerChoiceStrategyContext.update(o)}}checkAndEmitTaskExecutionEvents(){this.busy&&this.emitter?.emit(d.busy,this.info)}checkAndEmitTaskQueuingEvents(){this.hasBackPressure()&&this.emitter?.emit(d.backPressure,this.info)}checkAndEmitDynamicWorkerCreationEvents(){this.type===k.dynamic&&this.full&&this.emitter?.emit(d.full,this.info)}getWorkerInfo(e){return this.workerNodes[e]?.info}addWorkerNode(e){const t=new Q(e,this.worker,this.maxSize);this.starting&&(t.info.ready=!0),this.workerNodes.push(t);const s=this.getWorkerNodeKeyByWorker(e);if(-1===s)throw new Error("Worker node added not found");return s}removeWorkerNode(e){const t=this.getWorkerNodeKeyByWorker(e);-1!==t&&(this.workerNodes.splice(t,1),this.workerChoiceStrategyContext.remove(t))}hasWorkerNodeBackPressure(e){return!0===this.opts.enableTasksQueue&&this.workerNodes[e].hasBackPressure()}hasBackPressure(){return!0===this.opts.enableTasksQueue&&-1===this.workerNodes.findIndex((e=>!e.hasBackPressure()))}executeTask(e,t){this.beforeTaskExecutionHook(e,t),this.sendToWorker(e,t,t.transferList),this.checkAndEmitTaskExecutionEvents()}enqueueTask(e,t){const s=this.workerNodes[e].enqueueTask(t);return this.checkAndEmitTaskQueuingEvents(),s}dequeueTask(e){return this.workerNodes[e].dequeueTask()}tasksQueueSize(e){return this.workerNodes[e].tasksQueueSize()}flushTasksQueue(e){for(;this.tasksQueueSize(e)>0;)this.executeTask(e,this.dequeueTask(e));this.workerNodes[e].clearTasksQueue()}flushTasksQueues(){for(const[e]of this.workerNodes.entries())this.flushTasksQueue(e)}}class U extends A{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}setupHook(){s.setupPrimary({...this.opts.settings,exec:this.filePath})}isMain(){return s.isPrimary}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e].worker,s=new Promise((e=>{t.on("exit",(()=>{e()}))}));t.on("disconnect",(()=>{t.kill()})),await this.sendKillMessageToWorker(e,t.id),t.disconnect(),await s}sendToWorker(e,t){this.workerNodes[e].worker.send(t)}sendStartupMessageToWorker(e){this.sendToWorker(e,{ready:!1,workerId:this.workerNodes[e].worker.id})}registerWorkerMessageListener(e,t){this.workerNodes[e].worker.on("message",t)}createWorker(){return s.fork(this.opts.env)}get type(){return k.fixed}get worker(){return q.cluster}get busy(){return this.internalBusy()}}class B extends A{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}isMain(){return t.isMainThread}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e],s=t.worker,r=new Promise((e=>{s.on("exit",(()=>{e()}))}));await this.sendKillMessageToWorker(e,s.threadId),t.closeChannel(),await s.terminate(),await r}sendToWorker(e,t,s){this.workerNodes[e].messageChannel.port1.postMessage(t,s)}sendStartupMessageToWorker(e){const t=this.workerNodes[e].worker,s=this.workerNodes[e].messageChannel.port2;t.postMessage({ready:!1,workerId:t.threadId,port:s},[s])}registerWorkerMessageListener(e,t){this.workerNodes[e].messageChannel.port1.on("message",t)}createWorker(){return new t.Worker(this.filePath,{env:t.SHARE_ENV,...this.opts.workerOptions})}get type(){return k.fixed}get worker(){return q.thread}get busy(){return this.internalBusy()}}const D=6e4,L={killBehavior:x.SOFT,maxInactiveTime:D,killHandler:g};class _ extends a.AsyncResource{isMain;mainWorker;opts;taskFunctions;lastTaskTimestamp;statistics;activeInterval;constructor(e,t,s,r,i=L){super(e),this.isMain=t,this.mainWorker=s,this.opts=i,this.checkWorkerOptions(this.opts),this.checkTaskFunctions(r),this.isMain||this.getMainWorker()?.on("message",this.handleReadyMessage.bind(this))}checkWorkerOptions(e){this.opts={...L,...e},delete this.opts.async}checkTaskFunctions(e){if(null==e)throw new Error("taskFunctions parameter is mandatory");if(this.taskFunctions=new Map,"function"==typeof e){const t=e.bind(this);this.taskFunctions.set(l,t),this.taskFunctions.set("string"==typeof e.name&&e.name.trim().length>0?e.name:"fn1",t)}else{if(!f(e))throw new TypeError("taskFunctions parameter is not a function or a plain object");{let t=!0;for(const[s,r]of Object.entries(e)){if("string"!=typeof s)throw new TypeError("A taskFunctions parameter object key is not a string");if("string"==typeof s&&0===s.trim().length)throw new TypeError("A taskFunctions parameter object key an empty string");if("function"!=typeof r)throw new TypeError("A taskFunctions parameter object value is not a function");const e=r.bind(this);t&&(this.taskFunctions.set(l,e),t=!1),this.taskFunctions.set(s,e)}if(t)throw new Error("taskFunctions parameter object is empty")}}}hasTaskFunction(e){return this.checkTaskFunctionName(e),this.taskFunctions.has(e)}addTaskFunction(e,t){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot add a task function with the default reserved name");if("function"!=typeof t)throw new TypeError("fn parameter is not a function");try{const s=t.bind(this);return this.taskFunctions.get(e)===this.taskFunctions.get(l)&&this.taskFunctions.set(l,s),this.taskFunctions.set(e,s),this.sendTaskFunctionsListToMainWorker(),!0}catch{return!1}}removeTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot remove the task function with the default reserved name");if(this.taskFunctions.get(e)===this.taskFunctions.get(l))throw new Error("Cannot remove the task function used as the default task function");const t=this.taskFunctions.delete(e);return this.sendTaskFunctionsListToMainWorker(),t}listTaskFunctions(){const e=[...this.taskFunctions.keys()];let t=l;for(const[e,s]of this.taskFunctions)if(e!==l&&s===this.taskFunctions.get(l)){t=e;break}return[e[e.indexOf(l)],t,...e.filter((e=>e!==l&&e!==t))]}setDefaultTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot set the default task function reserved name as the default task function");if(!this.taskFunctions.has(e))throw new Error("Cannot set the default task function to a non-existing task function");try{return this.taskFunctions.set(l,this.taskFunctions.get(e)),!0}catch{return!1}}checkTaskFunctionName(e){if("string"!=typeof e)throw new TypeError("name parameter is not a string");if("string"==typeof e&&0===e.trim().length)throw new TypeError("name parameter is an empty string")}messageListener(e){this.checkMessageWorkerId(e),null!=e.statistics?this.statistics=e.statistics:null!=e.checkActive?e.checkActive?this.startCheckActive():this.stopCheckActive():null!=e.taskId&&null!=e.data?this.run(e):!0===e.kill&&this.handleKillMessage(e)}handleKillMessage(e){if(this.stopCheckActive(),W(this.opts.killHandler))(this.opts.killHandler?.()).then((()=>(this.sendToMainWorker({kill:"success",workerId:this.id}),null))).catch((()=>{this.sendToMainWorker({kill:"failure",workerId:this.id})})).finally((()=>{this.emitDestroy()})).catch(g);else try{this.opts.killHandler?.(),this.sendToMainWorker({kill:"success",workerId:this.id})}catch{this.sendToMainWorker({kill:"failure",workerId:this.id})}finally{this.emitDestroy()}}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Message worker id is not set");if(null!=e.workerId&&e.workerId!==this.id)throw new Error(`Message worker id ${e.workerId} does not match the worker id ${this.id}`)}startCheckActive(){this.lastTaskTimestamp=i.performance.now(),this.activeInterval=setInterval(this.checkActive.bind(this),(this.opts.maxInactiveTime??D)/2)}stopCheckActive(){null!=this.activeInterval&&(clearInterval(this.activeInterval),delete this.activeInterval)}checkActive(){i.performance.now()-this.lastTaskTimestamp>(this.opts.maxInactiveTime??D)&&this.sendToMainWorker({kill:this.opts.killBehavior,workerId:this.id})}getMainWorker(){if(null==this.mainWorker)throw new Error("Main worker not set");return this.mainWorker}sendTaskFunctionsListToMainWorker(){this.sendToMainWorker({taskFunctions:this.listTaskFunctions(),workerId:this.id})}handleError(e){return e instanceof Error?e.message:e}run(e){const t=this.getTaskFunction(e.name);W(t)?this.runInAsyncScope(this.runAsync.bind(this),this,t,e):this.runInAsyncScope(this.runSync.bind(this),this,t,e)}runSync(e,t){const{name:s,taskId:r,data:i}=t;try{let t=this.beginTaskPerformance(s);const o=e(i);t=this.endTaskPerformance(t),this.sendToMainWorker({data:o,taskPerformance:t,workerId:this.id,taskId:r})}catch(e){const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s??l,message:t,data:i},workerId:this.id,taskId:r})}finally{this.updateLastTaskTimestamp()}}runAsync(e,t){const{name:s,taskId:r,data:i}=t;let o=this.beginTaskPerformance(s);e(i).then((e=>(o=this.endTaskPerformance(o),this.sendToMainWorker({data:e,taskPerformance:o,workerId:this.id,taskId:r}),null))).catch((e=>{const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s??l,message:t,data:i},workerId:this.id,taskId:r})})).finally((()=>{this.updateLastTaskTimestamp()})).catch(g)}getTaskFunction(e){e=e??l;const t=this.taskFunctions.get(e);if(null==t)throw new Error(`Task function '${e}' not found`);return t}beginTaskPerformance(e){return this.checkStatistics(),{name:e??l,timestamp:i.performance.now(),...this.statistics.elu&&{elu:i.performance.eventLoopUtilization()}}}endTaskPerformance(e){return this.checkStatistics(),{...e,...this.statistics.runTime&&{runTime:i.performance.now()-e.timestamp},...this.statistics.elu&&{elu:i.performance.eventLoopUtilization(e.elu)}}}checkStatistics(){if(null==this.statistics)throw new Error("Performance statistics computation requirements not set")}updateLastTaskTimestamp(){null!=this.activeInterval&&(this.lastTaskTimestamp=i.performance.now())}}exports.ClusterWorker=class extends _{constructor(e,t={}){super("worker-cluster-pool:poolifier",s.isPrimary,s.worker,e,t)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready)try{this.getMainWorker()?.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}get id(){return this.getMainWorker().id}sendToMainWorker(e){this.getMainWorker().send(e)}},exports.DynamicClusterPool=class extends U{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.DynamicThreadPool=class extends B{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.FixedClusterPool=U,exports.FixedThreadPool=B,exports.KillBehaviors=x,exports.Measurements=E,exports.PoolEvents=d,exports.PoolTypes=k,exports.ThreadWorker=class extends _{port;constructor(e,s={}){super("worker-thread-pool:poolifier",t.isMainThread,t.parentPort,e,s)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready&&null!=e.port)try{this.port=e.port,this.port.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}handleKillMessage(e){super.handleKillMessage(e),this.port?.unref(),this.port?.close()}get id(){return t.threadId}sendToMainWorker(e){this.port.postMessage(e)}handleError(e){return e}},exports.WorkerChoiceStrategies=S,exports.WorkerTypes=q,exports.availableParallelism=()=>{let e=1;try{e=u.availableParallelism()}catch{const t=u.cpus();Array.isArray(t)&&t.length>0&&(e=t.length)}return e};
+"use strict";var e=require("node:events"),t=require("node:worker_threads"),s=require("node:cluster"),r=require("node:crypto"),i=require("node:perf_hooks"),o=require("node:fs"),n=require("node:os"),a=require("node:async_hooks");function h(e){var t=Object.create(null);return e&&Object.keys(e).forEach((function(s){if("default"!==s){var r=Object.getOwnPropertyDescriptor(e,s);Object.defineProperty(t,s,r.get?r:{enumerable:!0,get:function(){return e[s]}})}})),t.default=e,Object.freeze(t)}var u=h(n);const k=Object.freeze({fixed:"fixed",dynamic:"dynamic"});class c extends e.EventEmitter{}const d=Object.freeze({ready:"ready",busy:"busy",full:"full",destroy:"destroy",error:"error",taskError:"taskError",backPressure:"backPressure"}),l="default",g=Object.freeze((()=>{})),m={choiceRetries:6,runTime:{median:!1},waitTime:{median:!1},elu:{median:!1}},p={aggregate:!1,average:!1,median:!1},w=e=>{if(Array.isArray(e)&&0===e.length)return 0;if(Array.isArray(e)&&1===e.length)return e[0];const t=e.slice().sort(((e,t)=>e-t));return(t[t.length-1>>1]+t[t.length>>1])/2},y=(e,t=2)=>{const s=Math.pow(10,t);return Math.round(e*s*(1+Number.EPSILON))/s},f=e=>"object"==typeof e&&null!==e&&e?.constructor===Object&&"[object Object]"===Object.prototype.toString.call(e),T=(e,t)=>t===e,W=e=>"function"==typeof e&&"AsyncFunction"===e.constructor.name,N=(e,t,s,r)=>{t.aggregate&&(e.aggregate=(e.aggregate??0)+s,e.minimum=Math.min(s,e.minimum??1/0),e.maximum=Math.max(s,e.maximum??-1/0),t.average&&0!==r&&(e.average=e.aggregate/r),t.median&&null!=s&&(e.history.push(s),e.median=w(e.history)))},x=(e,t)=>{let s=!1;return function(...r){s||(s=!0,e.apply(t,r),s=!1)}},S=Object.freeze({SOFT:"SOFT",HARD:"HARD"}),E=Object.freeze({ROUND_ROBIN:"ROUND_ROBIN",LEAST_USED:"LEAST_USED",LEAST_BUSY:"LEAST_BUSY",LEAST_ELU:"LEAST_ELU",FAIR_SHARE:"FAIR_SHARE",WEIGHTED_ROUND_ROBIN:"WEIGHTED_ROUND_ROBIN",INTERLEAVED_WEIGHTED_ROUND_ROBIN:"INTERLEAVED_WEIGHTED_ROUND_ROBIN"}),v=Object.freeze({runTime:"runTime",waitTime:"waitTime",elu:"elu"});class b{pool;opts;nextWorkerNodeKey=0;previousWorkerNodeKey=0;strategyPolicy={dynamicWorkerUsage:!1,dynamicWorkerReady:!0};taskStatisticsRequirements={runTime:p,waitTime:p,elu:p};constructor(e,t=m){this.pool=e,this.opts=t,this.opts={...m,...t},this.choose=this.choose.bind(this)}setTaskStatisticsRequirements(e){this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.runTime,e.runTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.waitTime,e.waitTime?.median),this.toggleMedianMeasurementStatisticsRequirements(this.taskStatisticsRequirements.elu,e.elu?.median)}toggleMedianMeasurementStatisticsRequirements(e,t){e.average&&t&&(e.average=!1,e.median=t),e.median&&!t&&(e.average=!0,e.median=t)}resetWorkerNodeKeyProperties(){this.nextWorkerNodeKey=0,this.previousWorkerNodeKey=0}setOptions(e){this.opts={...m,...e},this.setTaskStatisticsRequirements(this.opts)}isWorkerNodeReady(e){return this.pool.workerNodes[e].info.ready}hasWorkerNodeBackPressure(e){return this.pool.hasWorkerNodeBackPressure(e)}isWorkerNodeEligible(e){return this.isWorkerNodeReady(e)&&!this.hasWorkerNodeBackPressure(e)}getWorkerTaskRunTime(e){return this.taskStatisticsRequirements.runTime.median?this.pool.workerNodes[e].usage.runTime?.median??0:this.pool.workerNodes[e].usage.runTime?.average??0}getWorkerTaskWaitTime(e){return this.taskStatisticsRequirements.waitTime.median?this.pool.workerNodes[e].usage.waitTime?.median??0:this.pool.workerNodes[e].usage.waitTime?.average??0}getWorkerTaskElu(e){return this.taskStatisticsRequirements.elu.median?this.pool.workerNodes[e].usage.elu.active?.median??0:this.pool.workerNodes[e].usage.elu.active?.average??0}checkNextWorkerNodeEligibility(e){this.isWorkerNodeEligible(this.nextWorkerNodeKey)||(this.nextWorkerNodeKey=void 0,this.previousWorkerNodeKey=e??this.previousWorkerNodeKey)}computeDefaultWorkerWeight(){let e=0;for(const t of n.cpus()){const s=t.speed.toString().length-1;e+=1/(t.speed/Math.pow(10,s))*Math.pow(10,s)}return Math.round(e/n.cpus().length)}}class I extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:{aggregate:!0,average:!0,median:!1}};workersVirtualTaskEndTimestamp=[];constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.workersVirtualTaskEndTimestamp=[],!0}update(e){return this.computeWorkerVirtualTaskEndTimestamp(e),!0}choose(){return this.nextWorkerNodeKey=this.fairShareNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(e){return this.workersVirtualTaskEndTimestamp.splice(e,1),!0}fairShareNextWorkerNodeKey(){let e,t=1/0;for(const[s]of this.pool.workerNodes.entries()){null==this.workersVirtualTaskEndTimestamp[s]&&this.computeWorkerVirtualTaskEndTimestamp(s);const r=this.workersVirtualTaskEndTimestamp[s];this.isWorkerNodeEligible(s)&&r<t&&(t=r,e=s)}return e}computeWorkerVirtualTaskEndTimestamp(e){this.workersVirtualTaskEndTimestamp[e]=this.getWorkerVirtualTaskEndTimestamp(e,this.getWorkerVirtualTaskStartTimestamp(e))}getWorkerVirtualTaskEndTimestamp(e,t){return t+(this.opts.measurement===v.elu?this.getWorkerTaskElu(e):this.getWorkerTaskRunTime(e))}getWorkerVirtualTaskStartTimestamp(e){return Math.max(performance.now(),this.workersVirtualTaskEndTimestamp[e]??-1/0)}}class C extends b{roundId=0;roundWeights;defaultWorkerWeight;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight(),this.roundWeights=this.getRoundWeights()}reset(){return this.resetWorkerNodeKeyProperties(),this.roundId=0,!0}update(){return!0}choose(){let e,t=this.roundId;for(let s=this.roundId;s<this.roundWeights.length;s++){t=s;for(let t=this.nextWorkerNodeKey??this.previousWorkerNodeKey;t<this.pool.workerNodes.length;t++){const r=this.opts.weights?.[t]??this.defaultWorkerWeight;if(this.isWorkerNodeEligible(t)&&r>=this.roundWeights[s]){e=t;break}}}this.roundId=t,null==e&&(this.previousWorkerNodeKey=this.nextWorkerNodeKey??this.previousWorkerNodeKey),this.nextWorkerNodeKey=e;const s=this.nextWorkerNodeKey;return this.nextWorkerNodeKey===this.pool.workerNodes.length-1?(this.nextWorkerNodeKey=0,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1):this.nextWorkerNodeKey=(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,s}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1,this.roundId=this.roundId===this.roundWeights.length-1?0:this.roundId+1)),!0}setOptions(e){super.setOptions(e),this.roundWeights=this.getRoundWeights()}getRoundWeights(){return null==this.opts.weights?[this.defaultWorkerWeight]:[...new Set(Object.values(this.opts.weights).slice().sort(((e,t)=>e-t)))]}}class R extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!1,median:!1},waitTime:{aggregate:!0,average:!1,median:!1},elu:p};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastBusyNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastBusyNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=(r.usage.runTime?.aggregate??0)+(r.usage.waitTime?.aggregate??0);if(this.isWorkerNodeEligible(s)&&0===i){e=s;break}this.isWorkerNodeEligible(s)&&i<t&&(t=i,e=s)}return e}}class z extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastUsedNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastUsedNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage.tasks,o=i.executed+i.executing+i.queued;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class M extends b{taskStatisticsRequirements={runTime:p,waitTime:p,elu:{aggregate:!0,average:!1,median:!1}};constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return!0}update(){return!0}choose(){return this.nextWorkerNodeKey=this.leastEluNextWorkerNodeKey(),this.nextWorkerNodeKey}remove(){return!0}leastEluNextWorkerNodeKey(){let e,t=1/0;for(const[s,r]of this.pool.workerNodes.entries()){const i=r.usage,o=i.elu?.active?.aggregate??0;if(this.isWorkerNodeEligible(s)&&0===o){e=s;break}this.isWorkerNodeEligible(s)&&o<t&&(t=o,e=s)}return e}}class O extends b{constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts)}reset(){return this.resetWorkerNodeKeyProperties(),!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.roundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1)),!0}roundRobinNextWorkerNodeKey(){return this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.nextWorkerNodeKey}}class F extends b{taskStatisticsRequirements={runTime:{aggregate:!0,average:!0,median:!1},waitTime:p,elu:p};defaultWorkerWeight;workerVirtualTaskRunTime=0;constructor(e,t=m){super(e,t),this.setTaskStatisticsRequirements(this.opts),this.defaultWorkerWeight=this.computeDefaultWorkerWeight()}reset(){return this.resetWorkerNodeKeyProperties(),this.workerVirtualTaskRunTime=0,!0}update(){return!0}choose(){const e=this.nextWorkerNodeKey;return this.weightedRoundRobinNextWorkerNodeKey(),this.checkNextWorkerNodeEligibility(e),e}remove(e){return this.nextWorkerNodeKey===e&&(0===this.pool.workerNodes.length?this.nextWorkerNodeKey=0:this.nextWorkerNodeKey>this.pool.workerNodes.length-1&&(this.nextWorkerNodeKey=this.pool.workerNodes.length-1),this.workerVirtualTaskRunTime=0),!0}weightedRoundRobinNextWorkerNodeKey(){const e=this.workerVirtualTaskRunTime;return e<(this.opts.weights?.[this.nextWorkerNodeKey??this.previousWorkerNodeKey]??this.defaultWorkerWeight)?this.workerVirtualTaskRunTime=e+this.getWorkerTaskRunTime(this.nextWorkerNodeKey??this.previousWorkerNodeKey):(this.nextWorkerNodeKey=this.nextWorkerNodeKey===this.pool.workerNodes.length-1?0:(this.nextWorkerNodeKey??this.previousWorkerNodeKey)+1,this.workerVirtualTaskRunTime=0),this.nextWorkerNodeKey}}class K{workerChoiceStrategy;opts;workerChoiceStrategies;choiceRetriesCount=0;constructor(e,t=E.ROUND_ROBIN,s=m){this.workerChoiceStrategy=t,this.opts=s,this.opts={...m,...s},this.execute=this.execute.bind(this),this.workerChoiceStrategies=new Map([[E.ROUND_ROBIN,new(O.bind(this))(e,s)],[E.LEAST_USED,new(z.bind(this))(e,s)],[E.LEAST_BUSY,new(R.bind(this))(e,s)],[E.LEAST_ELU,new(M.bind(this))(e,s)],[E.FAIR_SHARE,new(I.bind(this))(e,s)],[E.WEIGHTED_ROUND_ROBIN,new(F.bind(this))(e,s)],[E.INTERLEAVED_WEIGHTED_ROUND_ROBIN,new(C.bind(this))(e,s)]])}getStrategyPolicy(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).strategyPolicy}getTaskStatisticsRequirements(){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).taskStatisticsRequirements}setWorkerChoiceStrategy(e){this.workerChoiceStrategy!==e&&(this.workerChoiceStrategy=e),this.workerChoiceStrategies.get(this.workerChoiceStrategy)?.reset()}update(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).update(e)}execute(){const e=this.workerChoiceStrategies.get(this.workerChoiceStrategy).choose();if(null==e&&this.choiceRetriesCount<this.opts.choiceRetries)return this.choiceRetriesCount++,this.execute();if(null==e)throw new Error(`Worker node key chosen is null or undefined after ${this.choiceRetriesCount} retries`);return this.choiceRetriesCount=0,e}remove(e){return this.workerChoiceStrategies.get(this.workerChoiceStrategy).remove(e)}setOptions(e){this.opts={...m,...e};for(const t of this.workerChoiceStrategies.values())t.setOptions(e)}}class P extends Array{size;constructor(e=1024,...t){super(),this.checkSize(e),this.size=e,arguments.length>1&&this.push(...t)}push(...e){const t=super.push(...e);return t>this.size&&super.splice(0,t-this.size),this.length}unshift(...e){return super.unshift(...e)>this.size&&super.splice(this.size,e.length),this.length}concat(...e){const t=super.concat(e);return t.size=this.size,t.length>t.size&&t.splice(0,t.length-t.size),t}splice(e,t,...s){let r=[];if(arguments.length>=3&&null!=t){if(r=super.splice(e,t,...s),this.length>this.size){const e=super.splice(0,this.length-this.size);r=new P(r.length+e.length,...r,...e)}}else r=2===arguments.length?super.splice(e,t):super.splice(e);return r}resize(e){if(this.checkSize(e),0===e)this.length=0;else if(e<this.size)for(let t=e;t<this.size;t++)super.pop();this.size=e}empty(){return 0===this.length}full(){return this.length===this.size}checkSize(e){if(!Number.isSafeInteger(e))throw new TypeError(`Invalid circular array size: ${e} is not a safe integer`);if(e<0)throw new RangeError(`Invalid circular array size: ${e} < 0`)}}class q{value;next;prev;constructor(e){this.value=e}}class Q{head;tail;size;maxSize;constructor(){this.clear()}push(e){const t=new q(e);return null==this.tail?this.head=this.tail=t:(t.prev=this.tail,this.tail=this.tail.next=t),this.incrementSize()}unshift(e){const t=new q(e);return null==this.head?this.head=this.tail=t:(t.next=this.head,this.head=this.head.prev=t),this.incrementSize()}pop(){if(null==this.head)return;const e=this.tail;return this.tail=this.tail.prev,null==this.tail?this.head=void 0:this.tail.next=void 0,--this.size,e?.value}shift(){if(null==this.head)return;const e=this.head;return this.head=this.head.next,null==this.head?this.tail=void 0:this.head.prev=void 0,--this.size,e?.value}peekFirst(){return this.head?.value}peekLast(){return this.tail?.value}clear(){this.head=void 0,this.tail=void 0,this.size=0,this.maxSize=0}[Symbol.iterator](){let e=this.head;return{next:()=>{if(null==e)return{value:void 0,done:!0};const t={value:e.value,done:!1};return e=e.next,t}}}backward(){return{[Symbol.iterator]:()=>{let e=this.tail;return{next:()=>{if(null==e)return{value:void 0,done:!0};const t={value:e.value,done:!1};return e=e.prev,t}}}}}incrementSize(){return++this.size,this.size>this.maxSize&&(this.maxSize=this.size),this.size}}const A=Object.freeze({thread:"thread",cluster:"cluster"});class U{worker;info;messageChannel;usage;tasksQueueBackPressureSize;onBackPressure;taskFunctionsUsage;tasksQueue;constructor(e,s,r){if(null==e)throw new TypeError("Cannot construct a worker node without a worker");if(null==s)throw new TypeError("Cannot construct a worker node without a worker type");if(null==r)throw new TypeError("Cannot construct a worker node without a tasks queue back pressure size");if(!Number.isSafeInteger(r))throw new TypeError("Cannot construct a worker node with a tasks queue back pressure size that is not an integer");this.worker=e,this.info=this.initWorkerInfo(e,s),s===A.thread&&(this.messageChannel=new t.MessageChannel),this.usage=this.initWorkerUsage(),this.taskFunctionsUsage=new Map,this.tasksQueue=new Q,this.tasksQueueBackPressureSize=r}tasksQueueSize(){return this.tasksQueue.size}tasksQueueMaxSize(){return this.tasksQueue.maxSize}enqueueTask(e){const t=this.tasksQueue.push(e);return null!=this.onBackPressure&&this.hasBackPressure()&&x(this.onBackPressure,this)(this.info.id),t}unshiftTask(e){const t=this.tasksQueue.unshift(e);return null!=this.onBackPressure&&this.hasBackPressure()&&x(this.onBackPressure,this)(this.info.id),t}dequeueTask(){return this.tasksQueue.shift()}popTask(){return this.tasksQueue.pop()}clearTasksQueue(){this.tasksQueue.clear()}hasBackPressure(){return this.tasksQueue.size>=this.tasksQueueBackPressureSize}resetUsage(){this.usage=this.initWorkerUsage(),this.taskFunctionsUsage.clear()}closeChannel(){null!=this.messageChannel&&(this.messageChannel?.port1.unref(),this.messageChannel?.port2.unref(),this.messageChannel?.port1.close(),this.messageChannel?.port2.close(),delete this.messageChannel)}getTaskFunctionWorkerUsage(e){if(!Array.isArray(this.info.taskFunctions))throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list is not yet defined`);if(Array.isArray(this.info.taskFunctions)&&this.info.taskFunctions.length<3)throw new Error(`Cannot get task function worker usage for task function name '${e}' when task function names list has less than 3 elements`);return e===l&&(e=this.info.taskFunctions[1]),this.taskFunctionsUsage.has(e)||this.taskFunctionsUsage.set(e,this.initTaskFunctionWorkerUsage(e)),this.taskFunctionsUsage.get(e)}initWorkerInfo(e,t){return{id:this.getWorkerId(e,t),type:t,dynamic:!1,ready:!1}}initWorkerUsage(){const e=()=>this.tasksQueueSize(),t=()=>this.tasksQueueMaxSize();return{tasks:{executed:0,executing:0,get queued(){return e()},get maxQueued(){return t()},failed:0},runTime:{history:new P},waitTime:{history:new P},elu:{idle:{history:new P},active:{history:new P}}}}initTaskFunctionWorkerUsage(e){const t=()=>{let t=0;for(const s of this.tasksQueue)(s.name===l&&e===this.info.taskFunctions[1]||s.name!==l&&e===s.name)&&++t;return t};return{tasks:{executed:0,executing:0,get queued(){return t()},failed:0},runTime:{history:new P},waitTime:{history:new P},elu:{idle:{history:new P},active:{history:new P}}}}getWorkerId(e,t){return t===A.thread?e.threadId:t===A.cluster?e.id:void 0}}class B{numberOfWorkers;filePath;opts;workerNodes=[];emitter;promiseResponseMap=new Map;workerChoiceStrategyContext;max;starting;started;startTimestamp;constructor(e,t,s){if(this.numberOfWorkers=e,this.filePath=t,this.opts=s,!this.isMain())throw new Error("Cannot start a pool from a worker with the same type as the pool");this.checkNumberOfWorkers(this.numberOfWorkers),this.checkFilePath(this.filePath),this.checkPoolOptions(this.opts),this.chooseWorkerNode=this.chooseWorkerNode.bind(this),this.executeTask=this.executeTask.bind(this),this.enqueueTask=this.enqueueTask.bind(this),!0===this.opts.enableEvents&&(this.emitter=new c),this.workerChoiceStrategyContext=new K(this,this.opts.workerChoiceStrategy,this.opts.workerChoiceStrategyOptions),this.setupHook(),this.starting=!0,this.startPool(),this.starting=!1,this.started=!0,this.startTimestamp=i.performance.now()}checkFilePath(e){if(null==e||"string"!=typeof e||"string"==typeof e&&0===e.trim().length)throw new Error("Please specify a file with a worker implementation");if(!o.existsSync(e))throw new Error(`Cannot find the worker file '${e}'`)}checkNumberOfWorkers(e){if(null==e)throw new Error("Cannot instantiate a pool without specifying the number of workers");if(!Number.isSafeInteger(e))throw new TypeError("Cannot instantiate a pool with a non safe integer number of workers");if(e<0)throw new RangeError("Cannot instantiate a pool with a negative number of workers");if(this.type===k.fixed&&0===e)throw new RangeError("Cannot instantiate a fixed pool with zero worker")}checkDynamicPoolSize(e,t){if(this.type===k.dynamic){if(null==t)throw new TypeError("Cannot instantiate a dynamic pool without specifying the maximum pool size");if(!Number.isSafeInteger(t))throw new TypeError("Cannot instantiate a dynamic pool with a non safe integer maximum pool size");if(e>t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size inferior to the minimum pool size");if(0===t)throw new RangeError("Cannot instantiate a dynamic pool with a maximum pool size equal to zero");if(e===t)throw new RangeError("Cannot instantiate a dynamic pool with a minimum pool size equal to the maximum pool size. Use a fixed pool instead")}}checkPoolOptions(e){if(!f(e))throw new TypeError("Invalid pool options: must be a plain object");this.opts.workerChoiceStrategy=e.workerChoiceStrategy??E.ROUND_ROBIN,this.checkValidWorkerChoiceStrategy(this.opts.workerChoiceStrategy),this.opts.workerChoiceStrategyOptions={...m,...e.workerChoiceStrategyOptions},this.checkValidWorkerChoiceStrategyOptions(this.opts.workerChoiceStrategyOptions),this.opts.restartWorkerOnError=e.restartWorkerOnError??!0,this.opts.enableEvents=e.enableEvents??!0,this.opts.enableTasksQueue=e.enableTasksQueue??!1,this.opts.enableTasksQueue&&(this.checkValidTasksQueueOptions(e.tasksQueueOptions),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e.tasksQueueOptions))}checkValidWorkerChoiceStrategy(e){if(!Object.values(E).includes(e))throw new Error(`Invalid worker choice strategy '${e}'`)}checkValidWorkerChoiceStrategyOptions(e){if(!f(e))throw new TypeError("Invalid worker choice strategy options: must be a plain object");if(null!=e.choiceRetries&&!Number.isSafeInteger(e.choiceRetries))throw new TypeError("Invalid worker choice strategy options: choice retries must be an integer");if(null!=e.choiceRetries&&e.choiceRetries<=0)throw new RangeError(`Invalid worker choice strategy options: choice retries '${e.choiceRetries}' must be greater than zero`);if(null!=e.weights&&Object.keys(e.weights).length!==this.maxSize)throw new Error("Invalid worker choice strategy options: must have a weight for each worker node");if(null!=e.measurement&&!Object.values(v).includes(e.measurement))throw new Error(`Invalid worker choice strategy options: invalid measurement '${e.measurement}'`)}checkValidTasksQueueOptions(e){if(null!=e&&!f(e))throw new TypeError("Invalid tasks queue options: must be a plain object");if(null!=e?.concurrency&&!Number.isSafeInteger(e.concurrency))throw new TypeError("Invalid worker node tasks concurrency: must be an integer");if(null!=e?.concurrency&&e.concurrency<=0)throw new RangeError(`Invalid worker node tasks concurrency: ${e.concurrency} is a negative integer or zero`);if(null!=e?.queueMaxSize&&!Number.isSafeInteger(e.queueMaxSize))throw new TypeError("Invalid worker node tasks queue max size: must be an integer");if(null!=e?.queueMaxSize&&e.queueMaxSize<=0)throw new RangeError(`Invalid worker node tasks queue max size: ${e.queueMaxSize} is a negative integer or zero`)}startPool(){for(;this.workerNodes.reduce(((e,t)=>t.info.dynamic?e:e+1),0)<this.numberOfWorkers;)this.createAndSetupWorkerNode()}get info(){return{version:"2.6.32",type:this.type,worker:this.worker,ready:this.ready,strategy:this.opts.workerChoiceStrategy,minSize:this.minSize,maxSize:this.maxSize,...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{utilization:y(this.utilization)},workerNodes:this.workerNodes.length,idleWorkerNodes:this.workerNodes.reduce(((e,t)=>0===t.usage.tasks.executing?e+1:e),0),busyWorkerNodes:this.workerNodes.reduce(((e,t)=>t.usage.tasks.executing>0?e+1:e),0),executedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executed),0),executingTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.executing),0),...!0===this.opts.enableTasksQueue&&{queuedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.queued),0)},...!0===this.opts.enableTasksQueue&&{maxQueuedTasks:this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.maxQueued??0)),0)},...!0===this.opts.enableTasksQueue&&{backPressure:this.hasBackPressure()},failedTasks:this.workerNodes.reduce(((e,t)=>e+t.usage.tasks.failed),0),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate&&{runTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.runTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.runTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.runTime?.median??0))))}}},...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.aggregate&&{waitTime:{minimum:y(Math.min(...this.workerNodes.map((e=>e.usage.waitTime?.minimum??1/0)))),maximum:y(Math.max(...this.workerNodes.map((e=>e.usage.waitTime?.maximum??-1/0)))),average:y(this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0)/this.workerNodes.reduce(((e,t)=>e+(t.usage.tasks?.executed??0)),0)),...this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime.median&&{median:y(w(this.workerNodes.map((e=>e.usage.waitTime?.median??0))))}}}}}get ready(){return this.workerNodes.reduce(((e,t)=>!t.info.dynamic&&t.info.ready?e+1:e),0)>=this.minSize}get utilization(){const e=(i.performance.now()-this.startTimestamp)*this.maxSize;return(this.workerNodes.reduce(((e,t)=>e+(t.usage.runTime?.aggregate??0)),0)+this.workerNodes.reduce(((e,t)=>e+(t.usage.waitTime?.aggregate??0)),0))/e}get minSize(){return this.numberOfWorkers}get maxSize(){return this.max??this.numberOfWorkers}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Worker message received without worker id");if(null!=e.workerId&&-1===this.getWorkerNodeKeyByWorkerId(e.workerId))throw new Error(`Worker message received from unknown worker '${e.workerId}'`)}getWorkerNodeKeyByWorker(e){return this.workerNodes.findIndex((t=>t.worker===e))}getWorkerNodeKeyByWorkerId(e){return this.workerNodes.findIndex((t=>t.info.id===e))}setWorkerChoiceStrategy(e,t){this.checkValidWorkerChoiceStrategy(e),this.opts.workerChoiceStrategy=e,this.workerChoiceStrategyContext.setWorkerChoiceStrategy(this.opts.workerChoiceStrategy),null!=t&&this.setWorkerChoiceStrategyOptions(t);for(const[e,t]of this.workerNodes.entries())t.resetUsage(),this.sendStatisticsMessageToWorker(e)}setWorkerChoiceStrategyOptions(e){this.checkValidWorkerChoiceStrategyOptions(e),this.opts.workerChoiceStrategyOptions={...m,...e},this.workerChoiceStrategyContext.setOptions(this.opts.workerChoiceStrategyOptions)}enableTasksQueue(e,t){!0!==this.opts.enableTasksQueue||e||this.flushTasksQueues(),this.opts.enableTasksQueue=e,this.setTasksQueueOptions(t)}setTasksQueueOptions(e){!0===this.opts.enableTasksQueue?(this.checkValidTasksQueueOptions(e),this.opts.tasksQueueOptions=this.buildTasksQueueOptions(e),this.setTasksQueueMaxSize(this.opts.tasksQueueOptions.queueMaxSize)):null!=this.opts.tasksQueueOptions&&delete this.opts.tasksQueueOptions}setTasksQueueMaxSize(e){for(const t of this.workerNodes)t.tasksQueueBackPressureSize=e}buildTasksQueueOptions(e){return{queueMaxSize:Math.pow(this.maxSize,2),concurrency:1,...e}}get full(){return this.workerNodes.length>=this.maxSize}internalBusy(){return!0===this.opts.enableTasksQueue?-1===this.workerNodes.findIndex((e=>e.info.ready&&e.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency)):-1===this.workerNodes.findIndex((e=>e.info.ready&&0===e.usage.tasks.executing))}listTaskFunctions(){for(const e of this.workerNodes)if(Array.isArray(e.info.taskFunctions)&&e.info.taskFunctions.length>0)return e.info.taskFunctions;return[]}async execute(e,t,s){return await new Promise(((o,n)=>{this.started||n(new Error("Cannot execute a task on destroyed pool")),null!=t&&"string"!=typeof t&&n(new TypeError("name argument must be a string")),null!=t&&"string"==typeof t&&0===t.trim().length&&n(new TypeError("name argument must not be an empty string")),null==s||Array.isArray(s)||n(new TypeError("transferList argument must be an array"));const a=i.performance.now(),h=this.chooseWorkerNode(),u=this.getWorkerInfo(h);null!=t&&Array.isArray(u.taskFunctions)&&!u.taskFunctions.includes(t)&&n(new Error(`Task function '${t}' is not registered in the pool`));const k={name:t??l,data:e??{},transferList:s,timestamp:a,workerId:u.id,taskId:r.randomUUID()};this.promiseResponseMap.set(k.taskId,{resolve:o,reject:n,workerNodeKey:h}),!1===this.opts.enableTasksQueue||!0===this.opts.enableTasksQueue&&this.workerNodes[h].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency?this.executeTask(h,k):this.enqueueTask(h,k)}))}async destroy(){await Promise.all(this.workerNodes.map((async(e,t)=>{await this.destroyWorkerNode(t)}))),this.emitter?.emit(d.destroy,this.info),this.started=!1}async sendKillMessageToWorker(e,t){await new Promise(((s,r)=>{this.registerWorkerMessageListener(e,(e=>{"success"===e.kill?s():"failure"===e.kill&&r(new Error(`Worker ${t} kill message handling failed`))})),this.sendToWorker(e,{kill:!0,workerId:t})}))}setupHook(){}beforeTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.name);++s.tasks.executing,this.updateWaitTimeWorkerUsage(s,t)}}afterTaskExecutionHook(e,t){if(null!=this.workerNodes[e]?.usage){const s=this.workerNodes[e].usage;this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}if(this.shallUpdateTaskFunctionWorkerUsage(e)&&null!=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name)){const s=this.workerNodes[e].getTaskFunctionWorkerUsage(t.taskPerformance?.name);this.updateTaskStatisticsWorkerUsage(s,t),this.updateRunTimeWorkerUsage(s,t),this.updateEluWorkerUsage(s,t)}}shallUpdateTaskFunctionWorkerUsage(e){const t=this.getWorkerInfo(e);return null!=t&&Array.isArray(t.taskFunctions)&&t.taskFunctions.length>2}updateTaskStatisticsWorkerUsage(e,t){const s=e.tasks;null!=s.executing&&s.executing>0&&--s.executing,null==t.taskError?++s.executed:++s.failed}updateRunTimeWorkerUsage(e,t){N(e.runTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime,t.taskPerformance?.runTime??0,e.tasks.executed)}updateWaitTimeWorkerUsage(e,t){const s=i.performance.now(),r=s-(t.timestamp??s);N(e.waitTime,this.workerChoiceStrategyContext.getTaskStatisticsRequirements().waitTime,r,e.tasks.executed)}updateEluWorkerUsage(e,t){const s=this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu;N(e.elu.active,s,t.taskPerformance?.elu?.active??0,e.tasks.executed),N(e.elu.idle,s,t.taskPerformance?.elu?.idle??0,e.tasks.executed),s.aggregate&&null!=t.taskPerformance?.elu&&(null!=e.elu.utilization?e.elu.utilization=(e.elu.utilization+t.taskPerformance.elu.utilization)/2:e.elu.utilization=t.taskPerformance.elu.utilization)}chooseWorkerNode(){if(this.shallCreateDynamicWorker()){const e=this.createAndSetupDynamicWorkerNode();if(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)return e}return this.workerChoiceStrategyContext.execute()}shallCreateDynamicWorker(){return this.type===k.dynamic&&!this.full&&this.internalBusy()}createAndSetupWorkerNode(){const e=this.createWorker();e.on("online",this.opts.onlineHandler??g),e.on("message",this.opts.messageHandler??g),e.on("error",this.opts.errorHandler??g),e.on("error",(t=>{const s=this.getWorkerNodeKeyByWorker(e),r=this.getWorkerInfo(s);r.ready=!1,this.workerNodes[s].closeChannel(),this.emitter?.emit(d.error,t),!0===this.opts.restartWorkerOnError&&!this.starting&&this.started&&(r.dynamic?this.createAndSetupDynamicWorkerNode():this.createAndSetupWorkerNode()),!0===this.opts.enableTasksQueue&&this.redistributeQueuedTasks(s)})),e.on("exit",this.opts.exitHandler??g),e.once("exit",(()=>{this.removeWorkerNode(e)}));const t=this.addWorkerNode(e);return this.afterWorkerNodeSetup(t),t}createAndSetupDynamicWorkerNode(){const e=this.createAndSetupWorkerNode();this.registerWorkerMessageListener(e,(e=>{const t=this.getWorkerNodeKeyByWorkerId(e.workerId),s=this.workerNodes[t].usage;(T(S.HARD,e.kill)||T(S.SOFT,e.kill)&&(!1===this.opts.enableTasksQueue&&0===s.tasks.executing||!0===this.opts.enableTasksQueue&&0===s.tasks.executing&&0===this.tasksQueueSize(t)))&&this.destroyWorkerNode(t).catch((e=>{this.emitter?.emit(d.error,e)}))}));const t=this.getWorkerInfo(e);return this.sendToWorker(e,{checkActive:!0,workerId:t.id}),t.dynamic=!0,(this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerReady||this.workerChoiceStrategyContext.getStrategyPolicy().dynamicWorkerUsage)&&(t.ready=!0),this.checkAndEmitDynamicWorkerCreationEvents(),e}afterWorkerNodeSetup(e){this.registerWorkerMessageListener(e,this.workerListener()),this.sendStartupMessageToWorker(e),this.sendStatisticsMessageToWorker(e),!0===this.opts.enableTasksQueue&&(this.workerNodes[e].onBackPressure=this.tasksStealingOnBackPressure.bind(this))}sendStatisticsMessageToWorker(e){this.sendToWorker(e,{statistics:{runTime:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().runTime.aggregate,elu:this.workerChoiceStrategyContext.getTaskStatisticsRequirements().elu.aggregate},workerId:this.getWorkerInfo(e).id})}redistributeQueuedTasks(e){const t=this.workerNodes.filter(((t,s)=>s!==e));for(;this.tasksQueueSize(e)>0;){let s=e,r=1/0,i=!1;for(const[e,o]of t.entries()){if(o.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&(i=!0),o.info.ready&&0===o.usage.tasks.queued){s=e;break}o.info.ready&&o.usage.tasks.queued<r&&(r=o.usage.tasks.queued,s=e)}i?this.executeTask(s,this.dequeueTask(e)):this.enqueueTask(s,this.dequeueTask(e))}}tasksStealingOnBackPressure(e){const t=this.workerNodes[this.getWorkerNodeKeyByWorkerId(e)],s=this.workerNodes.filter((t=>t.info.id!==e)).sort(((e,t)=>e.usage.tasks.queued-t.usage.tasks.queued));for(const[e,r]of s.entries())r.info.ready&&t.usage.tasks.queued>0&&!r.hasBackPressure()&&(r.usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency?this.executeTask(e,t.popTask()):this.enqueueTask(e,t.popTask()))}workerListener(){return e=>{this.checkMessageWorkerId(e),null!=e.ready&&null!=e.taskFunctions?this.handleWorkerReadyResponse(e):null!=e.taskId?this.handleTaskExecutionResponse(e):null!=e.taskFunctions&&(this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId)).taskFunctions=e.taskFunctions)}}handleWorkerReadyResponse(e){if(!1===e.ready)throw new Error(`Worker ${e.workerId} failed to initialize`);const t=this.getWorkerInfo(this.getWorkerNodeKeyByWorkerId(e.workerId));t.ready=e.ready,t.taskFunctions=e.taskFunctions,null!=this.emitter&&this.ready&&this.emitter.emit(d.ready,this.info)}handleTaskExecutionResponse(e){const{taskId:t,taskError:s,data:r}=e,i=this.promiseResponseMap.get(t);if(null!=i){null!=s?(this.emitter?.emit(d.taskError,s),i.reject(s.message)):i.resolve(r);const o=i.workerNodeKey;this.afterTaskExecutionHook(o,e),this.promiseResponseMap.delete(t),!0===this.opts.enableTasksQueue&&this.tasksQueueSize(o)>0&&this.workerNodes[o].usage.tasks.executing<this.opts.tasksQueueOptions?.concurrency&&this.executeTask(o,this.dequeueTask(o)),this.workerChoiceStrategyContext.update(o)}}checkAndEmitTaskExecutionEvents(){this.busy&&this.emitter?.emit(d.busy,this.info)}checkAndEmitTaskQueuingEvents(){this.hasBackPressure()&&this.emitter?.emit(d.backPressure,this.info)}checkAndEmitDynamicWorkerCreationEvents(){this.type===k.dynamic&&this.full&&this.emitter?.emit(d.full,this.info)}getWorkerInfo(e){return this.workerNodes[e]?.info}addWorkerNode(e){const t=new U(e,this.worker,this.opts.tasksQueueOptions?.queueMaxSize??Math.pow(this.maxSize,2));this.starting&&(t.info.ready=!0),this.workerNodes.push(t);const s=this.getWorkerNodeKeyByWorker(e);if(-1===s)throw new Error("Worker node added not found");return s}removeWorkerNode(e){const t=this.getWorkerNodeKeyByWorker(e);-1!==t&&(this.workerNodes.splice(t,1),this.workerChoiceStrategyContext.remove(t))}hasWorkerNodeBackPressure(e){return!0===this.opts.enableTasksQueue&&this.workerNodes[e].hasBackPressure()}hasBackPressure(){return!0===this.opts.enableTasksQueue&&-1===this.workerNodes.findIndex((e=>!e.hasBackPressure()))}executeTask(e,t){this.beforeTaskExecutionHook(e,t),this.sendToWorker(e,t,t.transferList),this.checkAndEmitTaskExecutionEvents()}enqueueTask(e,t){const s=this.workerNodes[e].enqueueTask(t);return this.checkAndEmitTaskQueuingEvents(),s}dequeueTask(e){return this.workerNodes[e].dequeueTask()}tasksQueueSize(e){return this.workerNodes[e].tasksQueueSize()}flushTasksQueue(e){for(;this.tasksQueueSize(e)>0;)this.executeTask(e,this.dequeueTask(e));this.workerNodes[e].clearTasksQueue()}flushTasksQueues(){for(const[e]of this.workerNodes.entries())this.flushTasksQueue(e)}}class D extends B{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}setupHook(){s.setupPrimary({...this.opts.settings,exec:this.filePath})}isMain(){return s.isPrimary}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e].worker,s=new Promise((e=>{t.on("exit",(()=>{e()}))}));t.on("disconnect",(()=>{t.kill()})),await this.sendKillMessageToWorker(e,t.id),t.disconnect(),await s}sendToWorker(e,t){this.workerNodes[e].worker.send(t)}sendStartupMessageToWorker(e){this.sendToWorker(e,{ready:!1,workerId:this.workerNodes[e].worker.id})}registerWorkerMessageListener(e,t){this.workerNodes[e].worker.on("message",t)}createWorker(){return s.fork(this.opts.env)}get type(){return k.fixed}get worker(){return A.cluster}get busy(){return this.internalBusy()}}class L extends B{opts;constructor(e,t,s={}){super(e,t,s),this.opts=s}isMain(){return t.isMainThread}async destroyWorkerNode(e){this.flushTasksQueue(e);const t=this.workerNodes[e],s=t.worker,r=new Promise((e=>{s.on("exit",(()=>{e()}))}));await this.sendKillMessageToWorker(e,s.threadId),t.closeChannel(),await s.terminate(),await r}sendToWorker(e,t,s){this.workerNodes[e].messageChannel.port1.postMessage(t,s)}sendStartupMessageToWorker(e){const t=this.workerNodes[e].worker,s=this.workerNodes[e].messageChannel.port2;t.postMessage({ready:!1,workerId:t.threadId,port:s},[s])}registerWorkerMessageListener(e,t){this.workerNodes[e].messageChannel.port1.on("message",t)}createWorker(){return new t.Worker(this.filePath,{env:t.SHARE_ENV,...this.opts.workerOptions})}get type(){return k.fixed}get worker(){return A.thread}get busy(){return this.internalBusy()}}const _=6e4,V={killBehavior:S.SOFT,maxInactiveTime:_,killHandler:g};class j extends a.AsyncResource{isMain;mainWorker;opts;taskFunctions;lastTaskTimestamp;statistics;activeInterval;constructor(e,t,s,r,i=V){super(e),this.isMain=t,this.mainWorker=s,this.opts=i,this.checkWorkerOptions(this.opts),this.checkTaskFunctions(r),this.isMain||this.getMainWorker()?.on("message",this.handleReadyMessage.bind(this))}checkWorkerOptions(e){this.opts={...V,...e},delete this.opts.async}checkTaskFunctions(e){if(null==e)throw new Error("taskFunctions parameter is mandatory");if(this.taskFunctions=new Map,"function"==typeof e){const t=e.bind(this);this.taskFunctions.set(l,t),this.taskFunctions.set("string"==typeof e.name&&e.name.trim().length>0?e.name:"fn1",t)}else{if(!f(e))throw new TypeError("taskFunctions parameter is not a function or a plain object");{let t=!0;for(const[s,r]of Object.entries(e)){if("string"!=typeof s)throw new TypeError("A taskFunctions parameter object key is not a string");if("string"==typeof s&&0===s.trim().length)throw new TypeError("A taskFunctions parameter object key an empty string");if("function"!=typeof r)throw new TypeError("A taskFunctions parameter object value is not a function");const e=r.bind(this);t&&(this.taskFunctions.set(l,e),t=!1),this.taskFunctions.set(s,e)}if(t)throw new Error("taskFunctions parameter object is empty")}}}hasTaskFunction(e){return this.checkTaskFunctionName(e),this.taskFunctions.has(e)}addTaskFunction(e,t){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot add a task function with the default reserved name");if("function"!=typeof t)throw new TypeError("fn parameter is not a function");try{const s=t.bind(this);return this.taskFunctions.get(e)===this.taskFunctions.get(l)&&this.taskFunctions.set(l,s),this.taskFunctions.set(e,s),this.sendTaskFunctionsListToMainWorker(),!0}catch{return!1}}removeTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot remove the task function with the default reserved name");if(this.taskFunctions.get(e)===this.taskFunctions.get(l))throw new Error("Cannot remove the task function used as the default task function");const t=this.taskFunctions.delete(e);return this.sendTaskFunctionsListToMainWorker(),t}listTaskFunctions(){const e=[...this.taskFunctions.keys()];let t=l;for(const[e,s]of this.taskFunctions)if(e!==l&&s===this.taskFunctions.get(l)){t=e;break}return[e[e.indexOf(l)],t,...e.filter((e=>e!==l&&e!==t))]}setDefaultTaskFunction(e){if(this.checkTaskFunctionName(e),e===l)throw new Error("Cannot set the default task function reserved name as the default task function");if(!this.taskFunctions.has(e))throw new Error("Cannot set the default task function to a non-existing task function");try{return this.taskFunctions.set(l,this.taskFunctions.get(e)),!0}catch{return!1}}checkTaskFunctionName(e){if("string"!=typeof e)throw new TypeError("name parameter is not a string");if("string"==typeof e&&0===e.trim().length)throw new TypeError("name parameter is an empty string")}messageListener(e){this.checkMessageWorkerId(e),null!=e.statistics?this.statistics=e.statistics:null!=e.checkActive?e.checkActive?this.startCheckActive():this.stopCheckActive():null!=e.taskId&&null!=e.data?this.run(e):!0===e.kill&&this.handleKillMessage(e)}handleKillMessage(e){if(this.stopCheckActive(),W(this.opts.killHandler))(this.opts.killHandler?.()).then((()=>(this.sendToMainWorker({kill:"success",workerId:this.id}),null))).catch((()=>{this.sendToMainWorker({kill:"failure",workerId:this.id})})).finally((()=>{this.emitDestroy()})).catch(g);else try{this.opts.killHandler?.(),this.sendToMainWorker({kill:"success",workerId:this.id})}catch{this.sendToMainWorker({kill:"failure",workerId:this.id})}finally{this.emitDestroy()}}checkMessageWorkerId(e){if(null==e.workerId)throw new Error("Message worker id is not set");if(null!=e.workerId&&e.workerId!==this.id)throw new Error(`Message worker id ${e.workerId} does not match the worker id ${this.id}`)}startCheckActive(){this.lastTaskTimestamp=i.performance.now(),this.activeInterval=setInterval(this.checkActive.bind(this),(this.opts.maxInactiveTime??_)/2)}stopCheckActive(){null!=this.activeInterval&&(clearInterval(this.activeInterval),delete this.activeInterval)}checkActive(){i.performance.now()-this.lastTaskTimestamp>(this.opts.maxInactiveTime??_)&&this.sendToMainWorker({kill:this.opts.killBehavior,workerId:this.id})}getMainWorker(){if(null==this.mainWorker)throw new Error("Main worker not set");return this.mainWorker}sendTaskFunctionsListToMainWorker(){this.sendToMainWorker({taskFunctions:this.listTaskFunctions(),workerId:this.id})}handleError(e){return e instanceof Error?e.message:e}run(e){const t=this.getTaskFunction(e.name);W(t)?this.runInAsyncScope(this.runAsync.bind(this),this,t,e):this.runInAsyncScope(this.runSync.bind(this),this,t,e)}runSync(e,t){const{name:s,taskId:r,data:i}=t;try{let t=this.beginTaskPerformance(s);const o=e(i);t=this.endTaskPerformance(t),this.sendToMainWorker({data:o,taskPerformance:t,workerId:this.id,taskId:r})}catch(e){const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s,message:t,data:i},workerId:this.id,taskId:r})}finally{this.updateLastTaskTimestamp()}}runAsync(e,t){const{name:s,taskId:r,data:i}=t;let o=this.beginTaskPerformance(s);e(i).then((e=>(o=this.endTaskPerformance(o),this.sendToMainWorker({data:e,taskPerformance:o,workerId:this.id,taskId:r}),null))).catch((e=>{const t=this.handleError(e);this.sendToMainWorker({taskError:{name:s,message:t,data:i},workerId:this.id,taskId:r})})).finally((()=>{this.updateLastTaskTimestamp()})).catch(g)}getTaskFunction(e){e=e??l;const t=this.taskFunctions.get(e);if(null==t)throw new Error(`Task function '${e}' not found`);return t}beginTaskPerformance(e){return this.checkStatistics(),{name:e??l,timestamp:i.performance.now(),...this.statistics.elu&&{elu:i.performance.eventLoopUtilization()}}}endTaskPerformance(e){return this.checkStatistics(),{...e,...this.statistics.runTime&&{runTime:i.performance.now()-e.timestamp},...this.statistics.elu&&{elu:i.performance.eventLoopUtilization(e.elu)}}}checkStatistics(){if(null==this.statistics)throw new Error("Performance statistics computation requirements not set")}updateLastTaskTimestamp(){null!=this.activeInterval&&(this.lastTaskTimestamp=i.performance.now())}}exports.ClusterWorker=class extends j{constructor(e,t={}){super("worker-cluster-pool:poolifier",s.isPrimary,s.worker,e,t)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready)try{this.getMainWorker()?.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}get id(){return this.getMainWorker().id}sendToMainWorker(e){this.getMainWorker().send(e)}},exports.DynamicClusterPool=class extends D{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.DynamicThreadPool=class extends L{max;constructor(e,t,s,r={}){super(e,s,r),this.max=t,this.checkDynamicPoolSize(this.numberOfWorkers,this.max)}get type(){return k.dynamic}get busy(){return this.full&&this.internalBusy()}},exports.FixedClusterPool=D,exports.FixedThreadPool=L,exports.KillBehaviors=S,exports.Measurements=v,exports.PoolEvents=d,exports.PoolTypes=k,exports.ThreadWorker=class extends j{port;constructor(e,s={}){super("worker-thread-pool:poolifier",t.isMainThread,t.parentPort,e,s)}handleReadyMessage(e){if(e.workerId===this.id&&!1===e.ready&&null!=e.port)try{this.port=e.port,this.port.on("message",this.messageListener.bind(this)),this.sendToMainWorker({ready:!0,taskFunctions:this.listTaskFunctions(),workerId:this.id})}catch{this.sendToMainWorker({ready:!1,taskFunctions:this.listTaskFunctions(),workerId:this.id})}}handleKillMessage(e){super.handleKillMessage(e),this.port?.unref(),this.port?.close()}get id(){return t.threadId}sendToMainWorker(e){this.port.postMessage(e)}handleError(e){return e}},exports.WorkerChoiceStrategies=E,exports.WorkerTypes=A,exports.availableParallelism=()=>{let e=1;try{e=u.availableParallelism()}catch{const t=u.cpus();Array.isArray(t)&&t.length>0&&(e=t.length)}return e};

lib/pools/abstract-pool.d.ts

@@ -45,2 +45,6 @@ /// <reference types="node" />
     /**
+     * Whether the pool is started or not.
+     */
+    private started;
+    /**
      * The start timestamp of the pool.
@@ -124,2 +128,3 @@ */
     setTasksQueueOptions(tasksQueueOptions: TasksQueueOptions): void;
+    private setTasksQueueMaxSize;
     private buildTasksQueueOptions;
@@ -262,2 +267,3 @@ /**
     private redistributeQueuedTasks;
+    private tasksStealingOnBackPressure;
     /**
@@ -264,0 +270,0 @@ * This method is the listener registered for each worker message.

lib/pools/pool.d.ts

@@ -84,8 +84,14 @@ /// <reference types="node" />
 /**
- * Worker tasks queue options.
+ * Worker node tasks queue options.
  */
 export interface TasksQueueOptions {
     /**
-     * Maximum number of tasks that can be executed concurrently on a worker.
+     * Maximum tasks queue size per worker node flagging it as back pressured.
      *
+     * @defaultValue (pool maximum size)^2
+     */
+    readonly queueMaxSize?: number;
+    /**
+     * Maximum number of tasks that can be executed concurrently on a worker node.
+     *
      * @defaultValue 1
@@ -138,3 +144,3 @@ */
     /**
-     * Pool worker tasks queue.
+     * Pool worker node tasks queue.
      *
@@ -145,3 +151,3 @@ * @defaultValue false
     /**
-     * Pool worker tasks queue options.
+     * Pool worker node tasks queue options.
      */
@@ -187,3 +193,3 @@ tasksQueueOptions?: TasksQueueOptions;
      * - `'taskError'`: Emitted when an error occurs while executing a task.
-     * - `'backPressure'`: Emitted when all worker nodes have back pressure (i.e. their tasks queue is full: queue size \>= pool maximum size^2).
+     * - `'backPressure'`: Emitted when all worker nodes have back pressure (i.e. their tasks queue is full: queue size \>= maximum queue size).
      */
@@ -224,14 +230,14 @@ readonly emitter?: PoolEmitter;
     /**
-     * Enables/disables the worker tasks queue in this pool.
+     * Enables/disables the worker node tasks queue in this pool.
      *
-     * @param enable - Whether to enable or disable the worker tasks queue.
-     * @param tasksQueueOptions - The worker tasks queue options.
+     * @param enable - Whether to enable or disable the worker node tasks queue.
+     * @param tasksQueueOptions - The worker node tasks queue options.
      */
     readonly enableTasksQueue: (enable: boolean, tasksQueueOptions?: TasksQueueOptions) => void;
     /**
-     * Sets the worker tasks queue options in this pool.
+     * Sets the worker node tasks queue options in this pool.
      *
-     * @param tasksQueueOptions - The worker tasks queue options.
+     * @param tasksQueueOptions - The worker node tasks queue options.
      */
     readonly setTasksQueueOptions: (tasksQueueOptions: TasksQueueOptions) => void;
 }

lib/pools/selection-strategies/abstract-worker-choice-strategy.d.ts

@@ -100,6 +100,6 @@ import type { IPool } from '../pool';
      *
-     * @param chosenWorkerNodeKey - The chosen worker node key.
+     * @param chosenNextWorkerNodeKey - The chosen worker node key.
      */
-    protected checkNextWorkerNodeEligibility(chosenWorkerNodeKey: number | undefined): void;
+    protected checkNextWorkerNodeEligibility(chosenNextWorkerNodeKey: number | undefined): void;
     protected computeDefaultWorkerWeight(): number;
 }

lib/pools/version.d.ts

@@ -1,1 +0,1 @@
-export declare const version = "2.6.31";
+export declare const version = "2.6.32";

lib/pools/worker-node.d.ts

@@ -20,5 +20,8 @@ /// <reference types="node" />
     usage: WorkerUsage;
+    /** @inheritdoc */
+    tasksQueueBackPressureSize: number;
+    /** @inheritdoc */
+    onBackPressure?: (workerId: number) => void;
     private readonly taskFunctionsUsage;
     private readonly tasksQueue;
-    private readonly tasksQueueBackPressureSize;
     /**
@@ -29,5 +32,5 @@ * Constructs a new worker node.
      * @param workerType - The worker type.
-     * @param poolMaxSize - The pool maximum size.
+     * @param tasksQueueBackPressureSize - The tasks queue back pressure size.
      */
-    constructor(worker: Worker, workerType: WorkerType, poolMaxSize: number);
+    constructor(worker: Worker, workerType: WorkerType, tasksQueueBackPressureSize: number);
     /** @inheritdoc */
@@ -44,4 +47,8 @@ tasksQueueSize(): number;
     /** @inheritdoc */
+    unshiftTask(task: Task<Data>): number;
+    /** @inheritdoc */
     dequeueTask(): Task<Data> | undefined;
     /** @inheritdoc */
+    popTask(): Task<Data> | undefined;
+    /** @inheritdoc */
     clearTasksQueue(): void;
@@ -48,0 +55,0 @@ /** @inheritdoc */

lib/pools/worker.d.ts

@@ -199,2 +199,13 @@ /// <reference types="node" />
     /**
+     * Tasks queue back pressure size.
+     * This is the number of tasks that can be enqueued before the worker node has back pressure.
+     */
+    tasksQueueBackPressureSize: number;
+    /**
+     * Callback invoked when worker node tasks queue is back pressured.
+     *
+     * @param workerId - The worker id.
+     */
+    onBackPressure?: (workerId: number) => void;
+    /**
      * Tasks queue size.
@@ -213,2 +224,9 @@ *
     /**
+     * Prepends a task to the tasks queue.
+     *
+     * @param task - The task to prepend.
+     * @returns The tasks queue size.
+     */
+    readonly unshiftTask: (task: Task<Data>) => number;
+    /**
      * Dequeue task.
@@ -220,2 +238,8 @@ *
     /**
+     * Pops a task from the tasks queue.
+     *
+     * @returns The popped task.
+     */
+    readonly popTask: () => Task<Data> | undefined;
+    /**
      * Clears tasks queue.
@@ -222,0 +246,0 @@ */

lib/utils.d.ts

@@ -74,1 +74,9 @@ import type { MeasurementStatisticsRequirements, WorkerChoiceStrategyOptions } from './pools/selection-strategies/selection-strategies-types';
 export declare const updateMeasurementStatistics: (measurementStatistics: MeasurementStatistics, measurementRequirements: MeasurementStatisticsRequirements, measurementValue: number, numberOfMeasurements: number) => void;
+/**
+ * Executes a function once at a time.
+ *
+ * @param fn - The function to execute.
+ * @param context - The context to bind the function to.
+ * @returns The function to execute.
+ */
+export declare const once: (fn: (...args: any[]) => void, context: unknown) => (...args: any[]) => void;

package.json

 {
   "$schema": "https://json.schemastore.org/package",
   "name": "poolifier",
-  "version": "2.6.31",
+  "version": "2.6.32",
   "description": "Fast and small Node.js Worker_Threads and Cluster Worker Pool",
@@ -88,5 +88,5 @@ "license": "MIT",
     "@rollup/plugin-typescript": "^11.1.2",
-    "@types/node": "^20.5.1",
-    "@typescript-eslint/eslint-plugin": "^6.4.0",
-    "@typescript-eslint/parser": "^6.4.0",
+    "@types/node": "^20.5.3",
+    "@typescript-eslint/eslint-plugin": "^6.4.1",
+    "@typescript-eslint/parser": "^6.4.1",
     "benny": "^3.7.1",
@@ -100,10 +100,10 @@ "c8": "^8.0.1",
     "eslint-plugin-import": "^2.28.1",
-    "eslint-plugin-jsdoc": "^46.4.6",
-    "eslint-plugin-n": "^16.0.1",
+    "eslint-plugin-jsdoc": "^46.5.0",
+    "eslint-plugin-n": "^16.0.2",
     "eslint-plugin-promise": "^6.1.1",
     "eslint-plugin-spellcheck": "^0.0.20",
     "eslint-plugin-tsdoc": "^0.2.17",
-    "expect": "^29.6.2",
+    "expect": "^29.6.3",
     "husky": "^8.0.3",
-    "lint-staged": "^14.0.0",
+    "lint-staged": "^14.0.1",
     "microtime": "^3.1.1",
@@ -114,3 +114,3 @@ "mocha": "^10.2.0",
     "release-it": "^16.1.5",
-    "rollup": "^3.28.0",
+    "rollup": "^3.28.1",
     "rollup-plugin-analyzer": "^4.0.0",
@@ -117,0 +117,0 @@ "rollup-plugin-command": "^1.1.3",

README.md

@@ -48,2 +48,6 @@ <div align="center">
 - Tasks distribution strategies :white_check_mark:
+- Lockless tasks queueing :white_check_mark:
+- Queued tasks rescheduling:
+  - Tasks redistribution on worker error :white_check_mark:
+  - Tasks stealing under back pressure :white_check_mark:
 - General guidelines on pool choice :white_check_mark:
@@ -50,0 +54,0 @@ - Error handling out of the box :white_check_mark:

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