server/Common/sources/rabbitMQCore.js

/*
 * (c) Copyright Ascensio System SIA 2010-2017
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
 * EU, LV-1021.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
 *
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 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
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 */

'use strict';
var config = require('config');
var amqp = require('amqplib/callback_api');
var logger = require('./logger');

var cfgRabbitUrl = config.get('rabbitmq.url');
var cfgRabbitSocketOptions = config.get('rabbitmq.socketOptions');

var RECONNECT_TIMEOUT = 1000;

function connetPromise(closeCallback) {
  return new Promise(function(resolve, reject) {
    function startConnect() {
      amqp.connect(cfgRabbitUrl, cfgRabbitSocketOptions, function(err, conn) {
        if (null != err) {
          logger.error('[AMQP] %s', err.stack);
          setTimeout(startConnect, RECONNECT_TIMEOUT);
        } else {
          conn.on('error', function(err) {
            logger.error('[AMQP] conn error', err.stack);
          });
          var closeEventCallback = function() {
            //in some case receive multiple close events
            conn.removeListener('close', closeEventCallback);
            logger.debug('[AMQP] conn close');
            closeCallback();
          };
          conn.on('close', closeEventCallback);
          logger.debug('[AMQP] connected');
          resolve(conn);
        }
      });
    }
    startConnect();
  });
}
function createChannelPromise(conn) {
  return new Promise(function(resolve, reject) {
    conn.createChannel(function(err, channel) {
      if (null != err) {
        reject(err);
      } else {
        resolve(channel);
      }
    });
  });
}
function createConfirmChannelPromise(conn) {
  return new Promise(function(resolve, reject) {
    conn.createConfirmChannel(function(err, channel) {
      if (null != err) {
        reject(err);
      } else {
        resolve(channel);
      }
    });
  });
}
function assertExchangePromise(channel, exchange, type, options) {
  return new Promise(function(resolve, reject) {
    channel.assertExchange(exchange, type, options, function(err, ok) {
      if (null != err) {
        reject(err);
      } else {
        resolve(ok.exchange);
      }
    });
  });
}
function assertQueuePromise(channel, queue, options) {
  return new Promise(function(resolve, reject) {
    channel.assertQueue(queue, options, function(err, ok) {
      if (null != err) {
        reject(err);
      } else {
        resolve(ok.queue);
      }
    });
  });
}
function consumePromise(channel, queue, messageCallback, options) {
  return new Promise(function(resolve, reject) {
    channel.consume(queue, messageCallback, options, function(err, ok) {
      if (null != err) {
        reject(err);
      } else {
        resolve(ok);
      }
    });
  });
}

module.exports.connetPromise = connetPromise;
module.exports.createChannelPromise = createChannelPromise;
module.exports.createConfirmChannelPromise = createConfirmChannelPromise;
module.exports.assertExchangePromise = assertExchangePromise;
module.exports.assertQueuePromise = assertQueuePromise;
module.exports.consumePromise = consumePromise;