improved version that supports multiple appenders

log4js.js (text/plain), 8.87 KB, created by Seth Chisamore on 2005-11-16 20:08:45 UTC

(hide)

Description: improved version that supports multiple appenders

Filename:

MIME Type:

Creator: Seth Chisamore

Created: 2005-11-16 20:08:45 UTC

Size: 8.87 KB

patch

obsolete

>/* > * > * > * 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. > */ > >/** > * log4js is a helper to log in JavaScript in simmilar manner than in log4j. > * The API should be nearly the same. > * Example: > * <pre> > * //logging see log4js > * var log = new Logger(LogLevel.TRACE); //set the LogLevel > * log.setAppender(new WindowAppender()); //to log to seperate logwindow > * > * // if multiple appenders are set all will log > * log.setAppender(new FileAppender("C:\\somefile.log")); > * ... > * //call the log > * log.trace("trace me" ); > * </pre> > */ > >/** > * LogLevel Enumeration > */ >var LogLevel = { > FATAL: 5, > ERROR: 4, > WARN: 3, > INFO: 2, > DEBUG: 1, > TRACE: 0, > valueOf: function(level) { > switch (level) { > case this.TRACE: > return "trace"; > case this.DEBUG: > return "debug"; > case this.INFO: > return "info"; > case this.WARN: > return "warn"; > case this.ERROR: > return "error"; > case this.FATAL: > return "fatal"; > default: > return ""; > } > } > >}; > > >/** > * Logger to log messages to the defined appender.</p> > * Default appender is DummyAppender, which is ignoring all messages. Please > * use setAppender() to set a specific appender (e.g. WindowAppender). > */ >function Logger(logLevel) { > this.appenders = []; > this.level = logLevel || LogLevel.FATAL; > /** appender to write in */ > this.appenders.push(new DummyAppender()); >} > >Logger.prototype = { > > setAppender: function(appender) { > this.appenders.push(appender); > }, > setLogLevel: function(level) { > this.level = level; > }, > isTraceEnabled: function() { > if (this.level <= LogLevel.TRACE) { > return true; > } > return false; > }, > trace: function(message) { > if (this.isTraceEnabled()) { > this.log(message, LogLevel.TRACE); > } > }, > isDebugEnabled: function() { > if (this.level <= LogLevel.DEBUG) { > return true; > } > return false; > }, > debug: function(message) { > if (this.isDebugEnabled()) { > this.log(message, LogLevel.DEBUG); > } > }, > isInfoEnabled: function() { > if (this.level <= LogLevel.INFO) { > return true; > } > return false; > }, > info: function(message) { > if (this.isInfoEnabled()) { > this.log(message, LogLevel.INFO); > } > }, > isWarnEnabled: function() { > if (this.level <= LogLevel.WARN) { > return true; > } > return false; > }, > warn: function(message) { > if (this.isWarnEnabled()) { > this.log(message, LogLevel.WARN); > } > }, > isErrorEnabled: function() { > if (this.level <= LogLevel.ERROR) { > return true; > } > return false; > }, > error: function(message) { > if (this.isErrorEnabled()) { > this.log(message, LogLevel.ERROR); > } > }, > isFatalEnabled: function() { > if (this.level <= LogLevel.FATAL) { > return true; > } > return false; > }, > fatal: function(message) { > if (this.isFatalEnabled()) { > this.log(message, LogLevel.FATAL); > } > }, > clear: function() { > for(var i=0; i < this.appenders.length; i++) { > this.appenders[i].clear(); > } > }, > log: function(message, logLevel) { > for(var i=0; i < this.appenders.length; i++) { > this.appenders[i].append(message, logLevel); > } > } >} > >/** > * Dummy Appender doing nothing > */ >function DummyAppender() {} > >DummyAppender.prototype = { > append: function(message, logLevel) {}, > clear: function() {} >} > >/** > * Appender showing Logs in an own Window. > */ >function WindowAppender() {} > >WindowAppender.prototype = { > > append: function(message, logLevel) { > var now = new Date(); > > if (!window.top.debugWindow || window.top.debugWindow.closed) { > window.top.debugWindow = window.open("", "log4js", > "left=0,top=0,width=300,height=700,scrollbars=yes," + > "status=yes,resizable=yes"); > window.top.debugWindow.opener = self; > var doc = window.top.debugWindow.document; > > if(doc.getElementById('logging-console') == null) > { > doc.open(); > doc.write("<DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN "); > doc.write(" http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>\n\n"); > doc.write("<html xmlns=\"http://www.w3.org/1999/xhtml\">\n") > doc.write("<head>\n<title>log4js</title>\n"); > doc.write(" <style>"); > doc.write(" body{font-family:Icon; margin:0px;} "); > doc.write(" .fatal{color:red;} "); > doc.write(" .error{color:red;} "); > doc.write(" .warn{color:orange;} "); > doc.write(" .info{color:blue;} "); > doc.write(" .debug{color:black;}"); > doc.write(" .trace{color:grey;}"); > doc.write(" </style>"); > doc.write("</head>\n"); > doc.write("<body>\n"); > doc.write("<button value=\"Close\" onClick=\"self.close()\">Close</button>\n"); > //doc.write("<button value=\"Clear\" onClick=\"clearLogWindow();\">Clear</button>\n"); > doc.write(" <div id='logging-console'><ul id='log-list'></ul></div>\n"); > doc.write("</body>"); > > window.top.debugWindow.blur(); > window.top.debugWindow.focus(); > } > this.logConsole = doc.getElementById('logging-console'); > this.logList = doc.getElementById('log-list'); > } > > var loggingNode = window.top.debugWindow.document.createElement('li'); > loggingNode.className = LogLevel.valueOf(logLevel); > > var strNow = now.toLocaleString(); > var elem = loggingNode.appendChild( > window.top.debugWindow.document.createTextNode( strNow + ": " + message )); > > this.logList.appendChild(loggingNode); > }, > clear: function(){ > while (this.logList.hasChildNodes()) { > this.logList.removeChild(this.logList.firstChild); > } > } >}; > >/** > * Metatag Appender writing the logs to meta tags > */ >function MetatagAppender() {} > >MetatagAppender.prototype = { > append: function(message, level) { > var now = new Date(); > > var lines = message.split("\n"); > var headTag = document.getElementsByTagName("head")[0]; > > for (var i = 1; i <= lines.length; i++) { > var value = lines[i - 1]; > > if (i == 1) { > value = LogLevel.valueOf(level) + ": " + value; > } > else > { > value = "> " + value; > } > > var metaTag = document.createElement("meta"); > metaTag.setAttribute("name", "X-log4js:" + Logger.currentLine++); > metaTag.setAttribute("content", value); > headTag.appendChild(metaTag); > } > }, > clear: function() {} >}; > >/** > * File Appender writing the logs to a text file > * @author Seth Chisamore > */ >function FileAppender(file) {this.file = file || "C:\\log4js.log";}; > >FileAppender.prototype = { > writeFile: function(fileName, message) { > var fso, fileHandle; > fso = new ActiveXObject("Scripting.FileSystemObject"); > // try opening existing file, create if needed > fileHandle = fso.OpenTextFile(fileName, 8, true); > // write out our data > fileHandle.WriteLine(message); > fileHandle.close(); > }, > append: function(message, level) { > var now = new Date(); > var message = now + " [" + LogLevel.valueOf(level) + "] " + message; > this.writeFile(this.file, message); > }, > clear: function() {} >}; > >/** > * Windows Event Appender writes the logs to the Windows Event log > * @author Seth Chisamore > */ >function WindowsEventAppender() {}; > >WindowsEventAppender.prototype = { > writeWindowsEvent: function(level, data) { > var shell; > shell = new ActiveXObject("WScript.Shell"); > // write to windows event log > shell.LogEvent(level, data); > }, > append: function(message, level) { > var now = new Date(); > var message = now + " [" + LogLevel.valueOf(level) + "] " + message; > var level = 4; > > // Map log level to windows event log level. > // Windows events: - SUCCESS: 0, ERROR: 1, WARNING: 2, INFORMATION: 4, AUDIT_SUCCESS: 8, AUDIT_FAILURE: 16 > switch (LogLevel.valueOf(level)) { > case "error": > level = 1; > case "warn": > level = 2; > default: > level = 4; > } > this.writeWindowsEvent(level, message); > }, > clear: function() {} >}; > >/** > * Array extensions > */ >if (!Array.prototype.push) { > Array.prototype.push = function() { > var startLength = this.length; > for (var i = 0; i < arguments.length; i++) > this[startLength + i] = arguments[i]; > return this.length; > } >} > >Array.prototype.contains = function(object) { > for(var i = 0; i < this.length; i++) { > if (object == this[i]) > return true; > } > return false; >} View Attachment As Raw

This is ASF Bugzilla: the Apache Software Foundation bug system. In case of problems with the functioning of ASF Bugzilla, please contact bugzilla-admin@apache.org. Please Note: this e-mail address is only for reporting problems with ASF Bugzilla. Mail about any other subject will be silently ignored.

• • Home
  • | New
  • | Browse
  • | Search
  • |
    [?]
  • | Reports
  • | Help
  • | New Account
  • | Log In
    Remember [x]
  • | Forgot Password
    Login: [x]