anytv-kue

anytv-kue

Kue Helper for setup and cleanup of Kue

Changes to be made to old codes

1. Replace all require('kue'); with

2. NOTE: Define namespace when calling createQueue to ensure properly scheduling for multiple applications. ex

       const kue = require('anytv-kue')();
       const queue = kue.createQueue({
           prefix: 'namespace'
       });
   

Added features

• Setup kue

  // server.js (before)
  const kue = require('anytv-kue')();
  const queue = kue.createQueue();
  
  function start () {
      /* server code */
  }
  
  queue.on('error', err => {
      winston.log('error', 'QUEUE ERROR:', err);
  });
  
  process.once('SIGTERM', sig => {
      winston.log('SIGTERM', sig);
      queue.shutdown(5000, err => {
          winston.log('error', 'Kue shutdown:', err );
          process.exit(0);
      });
  });
  
  queue.active((err, ids) => {
      ids.forEach(id => {
          kue.Job.get(id, (_err, job) => {
              job.inactive();
          });
      });
  });
  
  queue.inactive((err, ids) => {
      ids.forEach(id => {
          kue.Job.get(id, (_err, job) => {
              job.inactive();
          });
      });
  });
  
  start();
  
  

  // server.js (now)
  const kue = require('antv-kue')();
  const queue = kue.createQueue();
  
  function start () {
      /* server code */
  }
  
  kue.setup(queue);
  
  start();
  
  

• Activate UI

      const kue = require('anytv-kue')();
      const queue = kue.createQueue({remove_on_complete:false});
      const express = require('express');
      const app = express();
  
      //activates UI without auth in `/kue`
      kue.activateUI(app)();
      //activates UI in route `/kueapp` without auth
      kue.activateUI(app)('/kueapp');
      //activates UI with basic auth in `/kue`
      kue.activateUI(app, 'username', 'password')();
      //activates UI with basic auth in `/kueapp`
      kue.activateUI(app, 'username', 'password')('/kueapp');
      //activates UI with custom middleware in `/kue`
      kue.activateUI(app, middleWare)();
      //activates UI with custom middleware in `/kueapp`
      kue.activateUI(app, middleWare)('/kueapp');
  

• Default Title

      const kue = require('anytv-kue')();
      const queue = kue.createQueue();
  
      queue.create('jobtitle', { test: 123 })
          .save(); //default title will be "{ test: 123 }"
  
      queue.create('jobtitle', { test: 123, title: '123'})
          .save(); //title will be "123"
  
      queue.create('jobtitle')
          .save(); //title will be "undefined"
  

• Cleanup jobs

      kue.cleanup(job_type, status);
  

• Remove jobs on complete

    // before
    const kue = require('kue');
    const queue = kue.createQueue();
  
    queue.create('name', {})
      .removeOnComplete(true)
      .save();
  
    queue.create('name2', {})
      .removeOnComplete(true)
      .save();
  

    //now
    const kue = require('anytv-kue')({shutdownTimer: 10000});
    const queue = kue.createQueue({remove_on_complete: true});
  
    queue.create('name', {})
      .save();
  
    queue.create('name2', {})
      .save();
  

• fixed_doubling and delay_doubling custom backoffs

  • fixed_doubling - starts at 2 minutes, then 4, then 8, etc
  • delay_doubling - starts at initial_delay * 2 (2 seconds if no initial delay)

      const kue = require('anytv-kue')();
      const queue = kue.createQueue();
  
      queue.createJob('jobtitle', { test: 123 })
          .backoff('fixed_doubling')
          .save(); // next delay will be 2 minutes
        
      queue.createJob('jobtitle', { test: 123 })
          .delay(1000 * 10) // 10 seconds
          .backoff('delay_doubling')
          .save(); // next delay will be 20 seconds
        
      queue.createJob('jobtitle', { test: 123 })
          .backoff('delay_doubling')
          .save(); // next delay will be 2 seconds
  

Available configurations

constructor

• shutdownTimer - time alotted for graceful shutdown

options

• remove_on_complete - will Kue remove data from redis when job is complete
• for other options, check out: https://github.com/lykmapipo/kue-scheduler#options

setup

kue.setup(queue, callbacks);

• queue - the queue we want to listen to (usually the return of kue.createQueue)
• callbacks - there are 5 callbacks available

  {
    //called when there is an error in redis queue
    error: function (err) {
  
    },
  
    //called when a job failed altogethere after alotted attempts
    failed: function (jobid) {
  
    },
  
    //called when a process SIGTERM occurs
    sigterm: function (sig) {
  
    },
  
    //called upon setup, control what you want to do with active jobs
    active: function (err, ids) {
  
    },
  
    //called upon setup, control what you want to do with inactive jobs
    inactive: function (err, ids) {
  
    }
  }
  

#How To's

Update Delayed jobs

    'use strict';

    const kue = require('kue');
    const queue = kue.createQueue();

    queue.delayed(function (err, selectedJobs) {
        selectedJobs.forEach(function (id) {
            kue.Job.get(id, function (err, job) {
                if (!job.removeOnComplete()) {
                    job.removeOnComplete(true).update();
                }
            });
        });
    });

.update() on a Job object will update it. this is an undocumented of Kue

Contributing Guidelines

Please read CONTRIBUTING.md