domotz-remote-pawn/src/amqp/consumer.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 13/05/15.
 */

var factory = function (handler, resourceLocator) {
    var myConsole = resourceLocator.log.decorateLogs();
    var configuration = resourceLocator.configuration;

    var callQueue = configuration.message_broker.call_queue;
    var exchange = configuration.message_broker.exchange || '';
    var amqpOptions = { noAck: false };

    return {
        consume: function (channel) {
            myConsole.info('Listening on queue ' + callQueue);
            return channel
                .consume(
                    callQueue,
                    function (msg) {
                        try {
                            handler.processMessage(channel, exchange, msg);
                            channel.ack(msg);
                        } catch (err) {
                            myConsole.warn(err.message);
                            myConsole.warn(err.stack);
                            channel.nack(msg);
                        }
                    },
                    amqpOptions
                )
                .then(null, myConsole.warn);
        },
    };
};

module.exports.factory = factory;