| // Copyright 2010 The Closure Library Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS-IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| /** |
| * @fileoverview This class listens on a message channel for logger commands and |
| * logs them on the local page. This is useful when dealing with message |
| * channels to contexts that don't have access to their own logging facilities. |
| * |
| */ |
| |
| goog.provide('goog.messaging.LoggerServer'); |
| |
| goog.require('goog.Disposable'); |
| goog.require('goog.log'); |
| goog.require('goog.log.Level'); |
| |
| |
| |
| /** |
| * Creates a logger server that logs messages on behalf of the remote end of a |
| * message channel. The remote end of the channel should use a |
| * {goog.messaging.LoggerClient} with the same service name. |
| * |
| * @param {!goog.messaging.MessageChannel} channel The channel that is sending |
| * the log messages. |
| * @param {string} serviceName The name of the logging service to listen for. |
| * @param {string=} opt_channelName The name of this channel. Used to help |
| * distinguish this client's messages. |
| * @constructor |
| * @extends {goog.Disposable} |
| * @final |
| */ |
| goog.messaging.LoggerServer = function(channel, serviceName, opt_channelName) { |
| goog.messaging.LoggerServer.base(this, 'constructor'); |
| |
| /** |
| * The channel that is sending the log messages. |
| * @type {!goog.messaging.MessageChannel} |
| * @private |
| */ |
| this.channel_ = channel; |
| |
| /** |
| * The name of the logging service to listen for. |
| * @type {string} |
| * @private |
| */ |
| this.serviceName_ = serviceName; |
| |
| /** |
| * The name of the channel. |
| * @type {string} |
| * @private |
| */ |
| this.channelName_ = opt_channelName || 'remote logger'; |
| |
| this.channel_.registerService( |
| this.serviceName_, goog.bind(this.log_, this), true /* opt_json */); |
| }; |
| goog.inherits(goog.messaging.LoggerServer, goog.Disposable); |
| |
| |
| /** |
| * Handles logging messages from the client. |
| * @param {!Object|string} message |
| * The logging information from the client. |
| * @private |
| */ |
| goog.messaging.LoggerServer.prototype.log_ = function(message) { |
| var args = |
| /** |
| * @type {{level: number, message: string, |
| * name: string, exception: Object}} |
| */ (message); |
| var level = goog.log.Level.getPredefinedLevelByValue(args['level']); |
| if (level) { |
| var msg = '[' + this.channelName_ + '] ' + args['message']; |
| goog.log.getLogger(args['name']) |
| .log(level, msg, args['exception']); |
| } |
| }; |
| |
| |
| /** @override */ |
| goog.messaging.LoggerServer.prototype.disposeInternal = function() { |
| goog.messaging.LoggerServer.base(this, 'disposeInternal'); |
| this.channel_.registerService(this.serviceName_, goog.nullFunction, true); |
| delete this.channel_; |
| }; |