dl/lib/queue/QueueLogger.js

DreamLab Libs

var logger = require('../logger');

/*
 * Queue service event logging
 *
 * <QUEUE>
 *  + <servicename>
 *      + <appname>
 *          + <credential_id>
 *              + connection
 *                  + connected         [counter]
 *                  + disconnected      [counter]
 *              + message
 *                  + delay             [miliseconds]
 *                  + ack.delay         [miliseconds]
 *                  + reject.delay      [miliseconds]
 *                  + postpone.delay    [miliseconds]
 *                  + postpone.rounds   [number]
 *                  + postpone.error    [counter]
 *              + publish
 *                  + confirm.delay     [miliseconds]
 *                  + reject.delay      [miliseconds]
 *                  + size.body         [bytes]
 *                  + size.total        [bytes]
 */

//TODO: this class will be probably to remove when all metrics are migrated to MaaS
var QueueLogger = function () {
    this._config = {
        connection: true,
        message: false,
        publish: false
    };

    this._monitoringConfig = {
        key: null,
        prefix: null
    };

    this._logger = logger.get('dl.queue.QueueLogger');
    this._logger.setParent(this._logger); // we do not want here to inherit from application DEFAULT logger
};

QueueLogger.prototype.setConfig = function (config, monitoringConfig) {
    console.log('QueueLogger/setConfig', config, monitoringConfig);

    this._config = config;
    this._monitoringConfig = monitoringConfig;

    if (this._monitoringConfig.key && this._monitoringConfig.prefix) {
        this._logger.configure({
            metricPrefix: this._monitoringConfig.prefix,
            reporters: {
                MAAS: {
                    key: this._monitoringConfig.key
                }
            }
        });
    }
};

QueueLogger.prototype.log = function (area, path, value, msgId) {
    if (value || value === 0) {
        this._logger.gauge([area, path], value);
    } else {
        this._logger.counter([area, path]);
    }

    if (this._config[area]) {
        if (value === undefined) {
            value = true;
        }

        var msgIdStr = msgId ? 'messageId=' + msgId : '';

        console.info('QueueLogger: %s value=%s %s', [area, path].join('.'), value, msgIdStr);
    }
};

exports.QueueLogger = QueueLogger;