domotz-remote-pawn/src/amqp/connection.js

Domotz Agent

/** This file is part of Domotz Agent.
  * Copyright (C) 2016  Domotz Ltd
  *
  * Domotz Agent is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
  * Domotz Agent is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Domotz Agent.  If not, see <http://www.gnu.org/licenses/>.
  **/
/**
 *
 * Created by Iacopo Papalini <ipapalini@domotz.com> on 17/09/15.
 */


var factory = function(amqplib, util, configuration) {

    var amqpServerConfiguration = configuration.message_broker;
    var credentials = configuration.credentials;

    function logConnection() {
        console.debug('AMQP - Connection successful:');
        Object.keys(amqpServerConfiguration).forEach(function (key) {
            console.debug('  --> ' + key + ': ' + amqpServerConfiguration[key]);
        });
    }

    function createConnectionUrl() {
        var user = credentials.user;
        var password = credentials.password;
        var protocol = (amqpServerConfiguration.protocol || 'amqp');
        var host = amqpServerConfiguration.host;
        var port = amqpServerConfiguration.port;
        var vhost = amqpServerConfiguration.virtual_host;

        console.info('AMQP - Connecting to: %s://%s:***********@%s:%s/%s',
            protocol, user, host, port, vhost);
        return util.format("%s://%s:%s@%s:%s/%s?heartbeat=60",
            protocol, user, password, host, port, vhost);
    }

    function setSignalHandler(connection) {
        logConnection();
        process.once('SIGINT', function () {
            connection.close();
        });
        return connection;
    }

    function connect(url) {
        return amqplib.connect(url);
    }

    return {
        createConnectionUrl: createConnectionUrl,
        connect: connect,
        setSignalHandler: setSignalHandler
    };
};


module.exports.factory = factory;