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/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * 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.
 */ 


package org.apache.commons.logging.impl;


import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.LogRecord;
import java.util.StringTokenizer;
import java.io.PrintWriter;
import java.io.StringWriter;

import org.apache.commons.logging.Log;


/**
 * 

Implementation of the org.apache.commons.logging.Log * interface that wraps the standard JDK logging mechanisms that are * available in SourceForge's Lumberjack for JDKs prior to 1.4.

* * @author Scott Sanders * @author Berin Loritsch * @author Peter Donald * @author Vince Eagen * @version $Revision: 1.6 $ $Date: 2004/06/06 21:13:43 $ */ public class Jdk13LumberjackLogger implements Log, Serializable { // ----------------------------------------------------- Instance Variables /** * The underlying Logger implementation we are using. */ protected transient Logger logger = null; protected String name = null; private String sourceClassName = "unknown"; private String sourceMethodName = "unknown"; private boolean classAndMethodFound = false; // ----------------------------------------------------------- Constructors /** * Construct a named instance of this Logger. * * @param name Name of the logger to be constructed */ public Jdk13LumberjackLogger(String name) { this.name = name; logger = getLogger(); } // --------------------------------------------------------- Public Methods private void log( Level level, String msg, Throwable ex ) { if( getLogger().isLoggable(level) ) { LogRecord record = new LogRecord(level, msg); if( !classAndMethodFound ) { getClassAndMethod(); } record.setSourceClassName(sourceClassName); record.setSourceMethodName(sourceMethodName); if( ex != null ) { record.setThrown(ex); } getLogger().log(record); } } /** *

Gets the class and method by looking at the stack trace for the * first entry that is not this class.

*/ private void getClassAndMethod() { try { Throwable throwable = new Throwable(); throwable.fillInStackTrace(); StringWriter stringWriter = new StringWriter(); PrintWriter printWriter = new PrintWriter( stringWriter ); throwable.printStackTrace( printWriter ); String traceString = stringWriter.getBuffer().toString(); StringTokenizer tokenizer = new StringTokenizer( traceString, "\n" ); tokenizer.nextToken(); String line = tokenizer.nextToken(); while ( line.indexOf( this.getClass().getName() ) == -1 ) { line = tokenizer.nextToken(); } while ( line.indexOf( this.getClass().getName() ) >= 0 ) { line = tokenizer.nextToken(); } int start = line.indexOf( "at " ) + 3; int end = line.indexOf( '(' ); String temp = line.substring( start, end ); int lastPeriod = temp.lastIndexOf( '.' ); sourceClassName = temp.substring( 0, lastPeriod ); sourceMethodName = temp.substring( lastPeriod + 1 ); } catch ( Exception ex ) { // ignore - leave class and methodname unknown } classAndMethodFound = true; } /** * Log a message with debug log level. */ public void debug(Object message) { log(Level.FINE, String.valueOf(message), null); } /** * Log a message and exception with debug log level. */ public void debug(Object message, Throwable exception) { log(Level.FINE, String.valueOf(message), exception); } /** * Log a message with error log level. */ public void error(Object message) { log(Level.SEVERE, String.valueOf(message), null); } /** * Log a message and exception with error log level. */ public void error(Object message, Throwable exception) { log(Level.SEVERE, String.valueOf(message), exception); } /** * Log a message with fatal log level. */ public void fatal(Object message) { log(Level.SEVERE, String.valueOf(message), null); } /** * Log a message and exception with fatal log level. */ public void fatal(Object message, Throwable exception) { log(Level.SEVERE, String.valueOf(message), exception); } /** * Return the native Logger instance we are using. */ public Logger getLogger() { if (logger == null) { logger = Logger.getLogger(name); } return (logger); } /** * Log a message with info log level. */ public void info(Object message) { log(Level.INFO, String.valueOf(message), null); } /** * Log a message and exception with info log level. */ public void info(Object message, Throwable exception) { log(Level.INFO, String.valueOf(message), exception); } /** * Is debug logging currently enabled? */ public boolean isDebugEnabled() { return (getLogger().isLoggable(Level.FINE)); } /** * Is error logging currently enabled? */ public boolean isErrorEnabled() { return (getLogger().isLoggable(Level.SEVERE)); } /** * Is fatal logging currently enabled? */ public boolean isFatalEnabled() { return (getLogger().isLoggable(Level.SEVERE)); } /** * Is info logging currently enabled? */ public boolean isInfoEnabled() { return (getLogger().isLoggable(Level.INFO)); } /** * Is trace logging currently enabled? */ public boolean isTraceEnabled() { return (getLogger().isLoggable(Level.FINEST)); } /** * Is warn logging currently enabled? */ public boolean isWarnEnabled() { return (getLogger().isLoggable(Level.WARNING)); } /** * Log a message with trace log level. */ public void trace(Object message) { log(Level.FINEST, String.valueOf(message), null); } /** * Log a message and exception with trace log level. */ public void trace(Object message, Throwable exception) { log(Level.FINEST, String.valueOf(message), exception); } /** * Log a message with warn log level. */ public void warn(Object message) { log(Level.WARNING, String.valueOf(message), null); } /** * Log a message and exception with warn log level. */ public void warn(Object message, Throwable exception) { log(Level.WARNING, String.valueOf(message), exception); } }


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