off-sqs-debearloper/lib/listQueues.js

Helper app that manages SQS and RabbitMQ transactions

var AWS         = require('aws-sdk'),
    config      = require('./config'),
    sqs         = {},
    when        = require('when');

module.exports = listQueues = function (queueName){
  var deferred = when.defer();

  if(config.env.production || config.env.qa){
    AWS.config.update(config.awsConfigFile);
    sqs = new AWS.SQS();
    return listSQSQueues(queueName);
  };

  return listRabbitQueues(queueName);
};

var listSQSQueues = function(queueName){
  var deferred = when.defer();

  sqs.listQueues(function(err, res){
    var queueFinder = false;

    if(res.QueueUrls){
      for(var i in res.QueueUrls){
        if(res.QueueUrls[i].split('/').pop() === queueName){
          queueFinder = true; };
      };
    };

    if(queueFinder){
      getQueue(queueName).then(function(queueUrl){
        deferred.resolve(queueUrl);
      });
    }else{
      createQueue(queueName).then(function(){
        getQueue(queueName).then(function(queueUrl){
          deferred.resolve(queueUrl);
        });
      });
    };
  });

  return deferred.promise;
}

var listRabbitQueues = function(queueName){
  var deferred = when.defer();
  deferred.resolve(queueName);

  return deferred.promise;
}

function listQueues(_queueName){
  var deferred = when.defer();
  sqs.listQueues(function(err, res){
    var queueFinder = false;

    if(res.QueueUrls)
      for(var i in res.QueueUrls)
        if(res.QueueUrls[i].split('/').pop() === _queueName)
          queueFinder = true;

    if(queueFinder){
      getQueue(_queueName).then(function(queueUrl){
        deferred.resolve(queueUrl);
      });
    } else {
      createQueue(_queueName).then(function(){
        getQueue(_queueName).then(function(queueUrl){
          deferred.resolve(queueUrl);
        })
      });
    };
  });
  return deferred.promise;
};

function getQueue(_queueName){
  var deferred = when.defer();

  sqs.getQueueUrl({QueueName: _queueName}, function(err, data){
    if(err){
      console.log("/63, " + err);
    } else{
      console.log("By using the SQS queue: " + data.QueueUrl);
      deferred.resolve(data.QueueUrl);
    }
  });

  return deferred.promise;
};

function createQueue(_queueName){
  var deferred = when.defer();
  var cqParams = {
    QueueName: _queueName,
    Attributes: {}
  };
  console.log(typeof sqs);
  sqs.createQueue(cqParams, function(err, res){
    if(err){
      console.log("/67, " + err);
      // stop recursivity
    } else {
      deferred.resolve();
    }
  });

  return deferred.promise;
};