mirror of https://github.com/node-red/node-red.git
115 lines
2.8 KiB
JavaScript
115 lines
2.8 KiB
JavaScript
/**
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* Copyright 2014, 2015 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var util = require("util");
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var EventEmitter = require("events").EventEmitter;
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var levels = {
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off: 1,
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fatal: 10,
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error: 20,
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warn: 30,
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info: 40,
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debug: 50,
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trace: 60,
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metric: 99
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}
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var levelNames = {
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10: "fatal",
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20: "error",
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30: "warn",
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40: "info",
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50: "debug",
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60: "trace",
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99: "metric"
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}
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var logHandlers = [];
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var metricsEnabled = false;
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var ConsoleLogHandler = function(settings) {
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this.logLevel = levels[settings.level]||levels.info;
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this.metricsOn = settings.metrics||false;
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metricsEnabled = this.metricsOn;
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this.on("log",function(msg) {
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if (this.shouldReportMessage(msg.level)) {
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if (msg.level == log.METRIC) {
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util.log("[metric] "+JSON.stringify(msg));
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} else {
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util.log("["+levelNames[msg.level]+"] "+(msg.type?"["+msg.type+":"+(msg.name||msg.id)+"] ":"")+msg.msg);
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}
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}
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});
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}
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util.inherits(ConsoleLogHandler, EventEmitter);
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ConsoleLogHandler.prototype.shouldReportMessage = function(msglevel) {
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return msglevel <= this.logLevel || (msglevel == log.METRIC && this.metricsOn);
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}
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var log = module.exports = {
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FATAL: 10,
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ERROR: 20,
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WARN: 30,
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INFO: 40,
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DEBUG: 50,
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TRACE: 60,
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METRIC: 99,
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init: function(settings) {
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logHandlers = [];
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var consoleSettings = {};
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if (settings.logging) {
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consoleSettings = settings.logging.console || {};
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}
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log.addHandler(new ConsoleLogHandler(consoleSettings));
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},
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addHandler: function(func) {
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logHandlers.push(func);
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},
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log: function(msg) {
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msg.timestamp = Date.now();
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logHandlers.forEach(function(handler) {
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handler.emit("log",msg);
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});
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},
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info: function(msg) {
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log.log({level:log.INFO,msg:msg});
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},
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warn: function(msg) {
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log.log({level:log.WARN,msg:msg});
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},
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error: function(msg) {
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log.log({level:log.ERROR,msg:msg});
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},
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trace: function(msg) {
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log.log({level:log.TRACE,msg:msg});
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},
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debug: function(msg) {
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log.log({level:log.DEBUG,msg:msg});
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},
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metric: function() {
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return metricsEnabled;
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}
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}
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