Jdk13LumberjackLogger.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.PrintWriter;
import java.io.Serializable;
import java.io.StringWriter;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import org.apache.commons.logging.Log;
/**
* Implementation of the {@code 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.
*
* @since 1.1
* @deprecated Scheduled for removal because the Lumberjack Project has been discontinued.
*/
@Deprecated
public class Jdk13LumberjackLogger implements Log, Serializable {
/** Serializable version identifier. */
private static final long serialVersionUID = -8649807923527610591L;
/**
* This member variable simply ensures that any attempt to initialize
* this class in a pre-1.4 JVM will result in an ExceptionInInitializerError.
* It must not be private, as an optimizing compiler could detect that it
* is not used and optimize it away.
*
* @deprecated No longer used.
*/
@Deprecated
protected static final Level dummyLevel = Level.FINE;
/**
* The underlying Logger implementation we are using.
*/
protected transient Logger logger;
/**
* Name.
*/
protected String name;
/** Source class name. */
private String sourceClassName = "unknown";
/** Source method name. */
private String sourceMethodName = "unknown";
/** Class and method found flag. */
private boolean classAndMethodFound;
/**
* Constructs a named instance of this Logger.
*
* @param name Name of the logger to be constructed
*/
public Jdk13LumberjackLogger(final String name) {
this.name = name;
logger = getLogger();
}
/**
* Logs a message with {@link java.util.logging.Level#FINE}.
*
* @param message to log
* @see org.apache.commons.logging.Log#debug(Object)
*/
@Override
public void debug(final Object message) {
log(Level.FINE, String.valueOf(message), null);
}
/**
* Logs a message with {@link java.util.logging.Level#FINE}.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#debug(Object, Throwable)
*/
@Override
public void debug(final Object message, final Throwable exception) {
log(Level.FINE, String.valueOf(message), exception);
}
/**
* Logs a message with {@link java.util.logging.Level#SEVERE}.
*
* @param message to log
* @see org.apache.commons.logging.Log#error(Object)
*/
@Override
public void error(final Object message) {
log(Level.SEVERE, String.valueOf(message), null);
}
/**
* Logs a message with {@link java.util.logging.Level#SEVERE}.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#error(Object, Throwable)
*/
@Override
public void error(final Object message, final Throwable exception) {
log(Level.SEVERE, String.valueOf(message), exception);
}
/**
* Logs a message with {@link java.util.logging.Level#SEVERE}.
*
* @param message to log
* @see org.apache.commons.logging.Log#fatal(Object)
*/
@Override
public void fatal(final Object message) {
log(Level.SEVERE, String.valueOf(message), null);
}
/**
* Logs a message with {@link java.util.logging.Level#SEVERE}.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#fatal(Object, Throwable)
*/
@Override
public void fatal(final Object message, final Throwable exception) {
log(Level.SEVERE, String.valueOf(message), exception);
}
/**
* Gets the class and method by looking at the stack trace for the
* first entry that is not this class.
*/
private void getClassAndMethod() {
try {
final Throwable throwable = new Throwable();
throwable.fillInStackTrace();
final StringWriter stringWriter = new StringWriter();
final PrintWriter printWriter = new PrintWriter(stringWriter);
throwable.printStackTrace(printWriter);
final String traceString = stringWriter.getBuffer().toString();
final StringTokenizer tokenizer = new StringTokenizer(traceString, "\n");
tokenizer.nextToken();
String line = tokenizer.nextToken();
while (!line.contains(this.getClass().getName())) {
line = tokenizer.nextToken();
}
while (line.contains(this.getClass().getName())) {
line = tokenizer.nextToken();
}
final int start = line.indexOf("at ") + 3;
final int end = line.indexOf('(');
final String temp = line.substring(start, end);
final int lastPeriod = temp.lastIndexOf('.');
sourceClassName = temp.substring(0, lastPeriod);
sourceMethodName = temp.substring(lastPeriod + 1);
} catch (final Exception ex) {
// ignore - leave class and methodname unknown
}
classAndMethodFound = true;
}
/**
* Gets the native Logger instance we are using.
*
* @return the native Logger instance we are using.
*/
public Logger getLogger() {
if (logger == null) {
logger = Logger.getLogger(name);
}
return logger;
}
/**
* Logs a message with {@link java.util.logging.Level#INFO}.
*
* @param message to log
* @see org.apache.commons.logging.Log#info(Object)
*/
@Override
public void info(final Object message) {
log(Level.INFO, String.valueOf(message), null);
}
/**
* Logs a message with {@link java.util.logging.Level#INFO}.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#info(Object, Throwable)
*/
@Override
public void info(final Object message, final Throwable exception) {
log(Level.INFO, String.valueOf(message), exception);
}
/**
* Is debug logging currently enabled?
*/
@Override
public boolean isDebugEnabled() {
return getLogger().isLoggable(Level.FINE);
}
/**
* Is error logging currently enabled?
*/
@Override
public boolean isErrorEnabled() {
return getLogger().isLoggable(Level.SEVERE);
}
/**
* Is fatal logging currently enabled?
*/
@Override
public boolean isFatalEnabled() {
return getLogger().isLoggable(Level.SEVERE);
}
/**
* Is info logging currently enabled?
*/
@Override
public boolean isInfoEnabled() {
return getLogger().isLoggable(Level.INFO);
}
/**
* Is trace logging currently enabled?
*/
@Override
public boolean isTraceEnabled() {
return getLogger().isLoggable(Level.FINEST);
}
/**
* Is warn logging currently enabled?
*/
@Override
public boolean isWarnEnabled() {
return getLogger().isLoggable(Level.WARNING);
}
private void log( final Level level, final String msg, final Throwable ex ) {
if ( getLogger().isLoggable(level) ) {
final LogRecord record = new LogRecord(level, msg);
if ( !classAndMethodFound ) {
getClassAndMethod();
}
record.setSourceClassName(sourceClassName);
record.setSourceMethodName(sourceMethodName);
if ( ex != null ) {
record.setThrown(ex);
}
getLogger().log(record);
}
}
/**
* Logs a message with {@link java.util.logging.Level#FINEST}.
*
* @param message to log
* @see org.apache.commons.logging.Log#trace(Object)
*/
@Override
public void trace(final Object message) {
log(Level.FINEST, String.valueOf(message), null);
}
/**
* Logs a message with {@link java.util.logging.Level#FINEST}.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#trace(Object, Throwable)
*/
@Override
public void trace(final Object message, final Throwable exception) {
log(Level.FINEST, String.valueOf(message), exception);
}
/**
* Logs a message with {@link java.util.logging.Level#WARNING}.
*
* @param message to log
* @see org.apache.commons.logging.Log#warn(Object)
*/
@Override
public void warn(final Object message) {
log(Level.WARNING, String.valueOf(message), null);
}
/**
* Logs a message with {@link java.util.logging.Level#WARNING}.
*
* @param message to log
* @param exception log this cause
* @see org.apache.commons.logging.Log#warn(Object, Throwable)
*/
@Override
public void warn(final Object message, final Throwable exception) {
log(Level.WARNING, String.valueOf(message), exception);
}
}