/*
* 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;
/**
* <p>Implementation of the <code>org.apache.commons.logging.Log</code>
* interface that wraps the standard JDK logging mechanisms that are
* available in SourceForge's Lumberjack for JDKs prior to 1.4.</p>
*
* @author <a href="mailto:[email protected]">Scott Sanders</a>
* @author <a href="mailto:[email protected]">Berin Loritsch</a>
* @author <a href="mailto:[email protected]">Peter Donald</a>
* @author <a href="mailto:[email protected]">Vince Eagen</a>
* @version $Revision: 371403 $ $Date: 2006-01-22 22:07:31 +0000 (Sun, 22 Jan 2006) $
* @since 1.1
*/
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;
/**
* This member variable simply ensures that any attempt to initialise
* this class in a pre-1.4 JVM will result in an ExceptionInInitializerError.
* It must not be private, as an optimising compiler could detect that it
* is not used and optimise it away.
*/
protected static final Level dummyLevel = Level.FINE;
// ----------------------------------------------------------- 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);
}
}
/**
* <p>Gets the class and method by looking at the stack trace for the
* first entry that is not this class.</p>
*/
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;
}
/**
* Logs a message with <code>java.util.logging.Level.FINE</code>.
*
* @param message to log
* @see org.apache.commons.logging.Log#debug(Object)
*/
public void debug(Object message) {
log(Level.FINE, String.valueOf(message), null);
}
/**
* Logs a message with <code>java.util.logging.Level.FINE</code>.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#debug(Object, Throwable)
*/
public void debug(Object message, Throwable exception) {
log(Level.FINE, String.valueOf(message), exception);
}
/**
* Logs a message with <code>java.util.logging.Level.SEVERE</code>.
*
* @param message to log
* @see org.apache.commons.logging.Log#error(Object)
*/
public void error(Object message) {
log(Level.SEVERE, String.valueOf(message), null);
}
/**
* Logs a message with <code>java.util.logging.Level.SEVERE</code>.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#error(Object, Throwable)
*/
public void error(Object message, Throwable exception) {
log(Level.SEVERE, String.valueOf(message), exception);
}
/**
* Logs a message with <code>java.util.logging.Level.SEVERE</code>.
*
* @param message to log
* @see org.apache.commons.logging.Log#fatal(Object)
*/
public void fatal(Object message) {
log(Level.SEVERE, String.valueOf(message), null);
}
/**
* Logs a message with <code>java.util.logging.Level.SEVERE</code>.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#fatal(Object, Throwable)
*/
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);
}
/**
* Logs a message with <code>java.util.logging.Level.INFO</code>.
*
* @param message to log
* @see org.apache.commons.logging.Log#info(Object)
*/
public void info(Object message) {
log(Level.INFO, String.valueOf(message), null);
}
/**
* Logs a message with <code>java.util.logging.Level.INFO</code>.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#info(Object, Throwable)
*/
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));
}
/**
* Logs a message with <code>java.util.logging.Level.FINEST</code>.
*
* @param message to log
* @see org.apache.commons.logging.Log#trace(Object)
*/
public void trace(Object message) {
log(Level.FINEST, String.valueOf(message), null);
}
/**
* Logs a message with <code>java.util.logging.Level.FINEST</code>.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#trace(Object, Throwable)
*/
public void trace(Object message, Throwable exception) {
log(Level.FINEST, String.valueOf(message), exception);
}
/**
* Logs a message with <code>java.util.logging.Level.WARNING</code>.
*
* @param message to log
* @see org.apache.commons.logging.Log#warn(Object)
*/
public void warn(Object message) {
log(Level.WARNING, String.valueOf(message), null);
}
/**
* Logs a message with <code>java.util.logging.Level.WARNING</code>.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#warn(Object, Throwable)
*/
public void warn(Object message, Throwable exception) {
log(Level.WARNING, String.valueOf(message), exception);
}
}
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