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// 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.debug.Logger');
/**
* 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}
*/
goog.messaging.LoggerServer = function(channel, serviceName, opt_channelName) {
goog.base(this);
/**
* 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.debug.Logger.Level.getPredefinedLevelByValue(args['level']);
if (level) {
var msg = '[' + this.channelName_ + '] ' + args['message'];
goog.debug.Logger.getLogger(args['name'])
.log(level, msg, args['exception']);
}
};
/** @override */
goog.messaging.LoggerServer.prototype.disposeInternal = function() {
goog.base(this, 'disposeInternal');
this.channel_.registerService(this.serviceName_, goog.nullFunction, true);
delete this.channel_;
};
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