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var Queue = require('firebase-queue'),
    Firebase = require('firebase');

// The location of the Queue - can be any Firebase Location
var ref = new Firebase('https://<your-firebase>.firebaseio.com/queue');

// Creates the Queue
var options = {
  specId: 'task_1',
  numWorkers: 10
};

var queue = new Queue(ref, options, function(data, progress, resolve, reject) {
  // Read and process task data
  console.log(data);

  // Do some work
  var percentageComplete = 0;
  var interval = setInterval(function() {
    percentageComplete += 20;
    if (percentageComplete >= 100) {
      clearInterval(interval);
    } else {
      progress(percentageComplete);
    }
  }, 1000);

  // Finish the task
  setTimeout(function() {
    resolve();
  }, 5000);
});

var Firebase = require('firebase');

// Same ref as in queue_worker.js
var ref = new Firebase('https://<your-firebase>.firebaseio.com/queue');

// This doesn't need to be set every time, but helps us
// define the spec for the task in this example
ref.child('specs').set({
  task_1: {
    in_progress_state: 'task_1_in_progress',
    timeout: 10000
  }
});

// Add tasks onto the queue
var taskNumber = 0;
setInterval(function() {
  ref.child('tasks').push({
    taskNumber: ++taskNumber
  });
}, 1000);

{
  "name": "my-queue",
  "version": "1.0.0",
  "description": "My Queue",
  "main": "queue_worker.js",
  "dependencies": {
    "firebase": "2.x",
    "firebase-queue": "^1.0.0"
  }
}