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// Copyright 2007 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 lives on a worker thread and it intercepts the
* goog.debug.Logger objects and sends a LOGGER command to the main thread
* instead.
*
* @author arv@google.com (Erik Arvidsson)
*/
goog.provide('goog.gears.LoggerClient');
goog.require('goog.Disposable');
goog.require('goog.debug');
goog.require('goog.debug.Logger');
/**
* Singleton class that overrides the goog.debug.Logger to send log commands
* to the main thread.
* @param {goog.gears.Worker} mainThread The main thread that has the
* logger server running.
* @param {number} logCommandId The command id used for logging.
* @param {string=} opt_workerName This, if present, is added to the error
* object when serializing it.
* @constructor
* @extends {goog.Disposable}
*/
goog.gears.LoggerClient = function(mainThread, logCommandId, opt_workerName) {
if (goog.gears.LoggerClient.instance_) {
return goog.gears.LoggerClient.instance_;
}
goog.Disposable.call(this);
/**
* The main thread object.
* @type {goog.gears.Worker}
* @private
*/
this.mainThread_ = mainThread;
/**
* The command id to use to send log commands to the main thread.
* @type {number}
* @private
*/
this.logCommandId_ = logCommandId;
/**
* The name of the worker thread.
* @type {string}
* @private
*/
this.workerName_ = opt_workerName || '';
var loggerClient = this;
// Override the log method
goog.debug.Logger.prototype.doLogRecord_ = function(logRecord) {
var name = this.getName();
loggerClient.sendLog_(
name, logRecord.getLevel(), logRecord.getMessage(),
logRecord.getException());
};
goog.gears.LoggerClient.instance_ = this;
};
goog.inherits(goog.gears.LoggerClient, goog.Disposable);
/**
* The singleton instance if any.
* @type {goog.gears.LoggerClient?}
* @private
*/
goog.gears.LoggerClient.instance_ = null;
/**
* Sends a log message to the main thread.
* @param {string} name The name of the logger.
* @param {goog.debug.Logger.Level} level One of the level identifiers.
* @param {string} msg The string message.
* @param {Object=} opt_exception An exception associated with the message.
* @private
*/
goog.gears.LoggerClient.prototype.sendLog_ = function(name,
level,
msg,
opt_exception) {
var exception;
if (opt_exception) {
var prefix = this.workerName_ ? this.workerName_ + ': ' : '';
exception = {
message: prefix + opt_exception.message,
stack: opt_exception.stack ||
goog.debug.getStacktrace(goog.debug.Logger.prototype.log)
};
// Add messageN to the exception in case it was added using
// goog.debug.enhanceError.
for (var i = 0; 'message' + i in opt_exception; i++) {
exception['message' + i] = String(opt_exception['message' + i]);
}
}
this.mainThread_.sendCommand(
this.logCommandId_,
[name, level.value, msg, exception]);
};
/** @override */
goog.gears.LoggerClient.prototype.disposeInternal = function() {
goog.gears.LoggerClient.superClass_.disposeInternal.call(this);
this.mainThread_ = null;
goog.gears.LoggerClient.instance_ = null;
};
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