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pjobs

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    pjobs

A simple and efficient queue job executor using promises. And some promise's utilities.


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123
increased by14.95%
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41.4 kB
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pjobs

A simple, efficient and small (just 2kb) queue job executor using promises. And some promise's utilities.

install

npm install --save pjobs

usage

queuePromises

defines an executor for jobs. A job is just a function that returns a Promise. You can also control concurrency and promises. Demonstration

import { queuePromises } from 'pjobs'
const queue = queuePromises({ 
  concurrency: 1, // maximum of promises running concurrently
  onProgress (status) { // allow you to inform users about execution progress
    console.log('queue status: ', status)
  }
})
queue.enqueue(async () => { // add a job to the queue
  console.log('task 1')
})
const promiseForTask2 = queue.promise(async () => { // add another job but returns a promise to this
  console.log('task 2')
  return 'OK'
})

await queue.waitFor() // wait for all jobs to be finished.
await promiseForTask2 // returns 'OK'

defer

allow you to deferred promise. Like promise-deferred NPM but lighter.

import { defer } from 'pjobs'

const deffered = defer<number>()
setTimeout( ()=> deffered.resolve(1), 10) // 
setTimeout( ()=> deffered.reject(new Error('timeout')), 100)
await deffered.promise

sleep

allow you pause execution flow for some miliseconds

import { sleep } from 'pjobs'
await sleep(100) // pauses execution flow for 100 miliseconds

asap

delay execution of a function to as soon as possible

import { asap } from 'pjobs'
asap(()=>console.log('b')) // 'b' will be logged after 'a'
console.log('a');

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Last updated on 19 Dec 2021

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