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disque-eventemitter

v0.3.1

Published

EventEmitter wrapper for Disque GetJob

Downloads

6

Readme

disque-eventemitter

shippable Build NPM Version NPM Downloads

EventEmitter to simplify disque GETJOB

Features

  • EventEmitter pattern for GETJOB
  • job event emitted for each job
  • Supports pause/resume of emitter

Installation

  $ npm install disque-eventemitter --save

Usage

'use strict';

var DisqueEventEmitter = require('disque-eventemitter');

console.info('Listening for jobs Ctrl-C to end');
var de = new DisqueEventEmitter({host:'127.0.0.1', port: 7711}, 'test', {concurrency: 2});

de.on('error', function(err) {
    console.error(err);
});

de.on('job', function(job, done) {
    console.info(job);
    de.ack(job, function() {
        // Indicate we are done and to ack the job
        setTimeout(function(){
            done();
        }, 5000 * Math.random());
    });
});

Documentation

new DisqueEventEmitter(disqueConfig, queueName, options)

Sets up the instance of disque to connect to and the queue to use

Arguments

  • disqueConfig - Config hash that is passed straight through to disque. Example: {'host':'127.0.0.1', 'port': 7711}
  • queueName - Name of queue to get jobs from
  • options - Options
    • concurrency - Number of jobs to emit in parallel. Defaults to 1
    • jobCount - Number of jobs to get at once. Defaults to 1. If you get more than one job at a time all will be emitted and may exceed concurrency limit.
    • withCounters - Get jobs with counters showing nacks and additional deliveries

ack(job, callback)

Removes job from queue. If you don't ack a job it will keep reappearing in emitted events.

nack(job, callback)

Immediately returns job back to queue. Job will be re-emitted.

pause()

Pauses emitting jobs. Jobs may still be emitted from the previous scan operation.

resume()

Resumes a paused emitter.

job event

.on('job', function(job, done){})

When the job event is raised the callback receives two arguments: the job, and a completion callback. You must call the completion callback when done to prevent stalling the EventEmitter

People

The author is Chris Kinsman from PushSpring

License

MIT