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redisqueue

v0.2.0

Published

redis backed queue

Downloads

4

Readme

RedisQueue

A simple queue for tasks using Redis

Install

npm install redisqueue

Usage

####Add tasks:

var RedisQueue = require('rq');

var taskQueue = new RedisQueue('test queue', {
    host: '127.0.0.1',
    port: 6379
});

taskQueue.enqueue({
    foo: 'bar',
    baz: 'qux'
});

####Process:

var RedisQueue = require('rq');

var taskQueue = new RedisQueue('test queue', {
    host: '127.0.0.1',
    port: 6379
});

taskQueue.dequeue(function(task) {
    console.log(task.data.foo); // 'bar'
    console.log(task.data.baz); // 'qux'

    task.done();

    // or task.done(new Error('something went wrong'));
});

taskQueue.on('error', function(err) {
    console.log(err.message);
});

##Retries:

By default all tasks are only attempted once. You may queues to attempt a task multiple times. Re-attempts will happen immediately after a failed attempt by the same queue instance.

##Events:

Queues fire a number of events:

####queue.on('error', function(err) {}) Whenever an error occurs with the queue or underlying redis client

####queue.on('complete', function(task) {}) Whenever a task is completed successfully

####queue.on('fail', function(err, task) {}) Whenever a task attempt is unsuccessful. Fired once for each attempt

API

###RedisQueue(name, [options])

The constructor. Name specifies the name of the queue in redis. Queues only process tasks added to the queue with the same name. Options defines the redis settings including: host: host of the redis server. defaults to local host port: port of redis server. defaults to 6379 retry: max number of retries if a task fails. defaults to 0

####Queue.enqueue(data)

Add a new task to the queue. Data is a javascript object containing data specific to the created task

####Queue.dequeue(handler)

Define the handler function to process all tasks with. Handler is passed one argument: task, which holds the data of the current task and a callback to signal completion

####Task.data

Returns the data associated with the task

####Task.done([err])

Signals the completion of the task. If an error is passed, the task will be marked as unsuccessful.

License

MIT