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/*
* 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 org.apache.avalon.framework.logger.Logger;
import org.apache.commons.logging.Log;
/**
* Implementation of commons-logging Log interface that delegates all
* logging calls to the Avalon logging abstraction: the Logger interface.
*
* There are two ways in which this class can be used:
*
* - the instance can be constructed with an Avalon logger
* (by calling {@link #AvalonLogger(Logger)}). In this case, it acts
* as a simple thin wrapping implementation over the logger. This is
* particularly useful when using a property setter.
*
* - the {@link #setDefaultLogger} class property can be called which
* sets the ancestral Avalon logger for this class. Any
AvalonLogger
* instances created through the LogFactory mechanisms will output
* to child loggers of this Logger.
*
*
*
* Note: AvalonLogger does not implement Serializable
* because the constructors available for it make this impossible to achieve in all
* circumstances; there is no way to "reconnect" to an underlying Logger object on
* deserialization if one was just passed in to the constructor of the original
* object. This class was marked Serializable in the 1.0.4 release of
* commons-logging, but this never actually worked (a NullPointerException would
* be thrown as soon as the deserialized object was used), so removing this marker
* is not considered to be an incompatible change.
*
* @version $Id: AvalonLogger.java 1435115 2013-01-18 12:40:19Z tn $
*/
public class AvalonLogger implements Log {
/** Ancestral Avalon logger. */
private static volatile Logger defaultLogger = null;
/** Avalon logger used to perform log. */
private final transient Logger logger;
/**
* Constructs an AvalonLogger that outputs to the given
* Logger instance.
*
* @param logger the Avalon logger implementation to delegate to
*/
public AvalonLogger(Logger logger) {
this.logger = logger;
}
/**
* Constructs an AvalonLogger that will log to a child
* of the Logger set by calling {@link #setDefaultLogger}.
*
* @param name the name of the avalon logger implementation to delegate to
*/
public AvalonLogger(String name) {
if (defaultLogger == null) {
throw new NullPointerException("default logger has to be specified if this constructor is used!");
}
this.logger = defaultLogger.getChildLogger(name);
}
/**
* Gets the Avalon logger implementation used to perform logging.
*
* @return avalon logger implementation
*/
public Logger getLogger() {
return logger;
}
/**
* Sets the ancestral Avalon logger from which the delegating loggers will descend.
*
* @param logger the default avalon logger,
* in case there is no logger instance supplied in constructor
*/
public static void setDefaultLogger(Logger logger) {
defaultLogger = logger;
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.debug.
*
* @param message to log
* @param t log this cause
* @see org.apache.commons.logging.Log#debug(Object, Throwable)
*/
public void debug(Object message, Throwable t) {
if (getLogger().isDebugEnabled()) {
getLogger().debug(String.valueOf(message), t);
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.debug.
*
* @param message to log.
* @see org.apache.commons.logging.Log#debug(Object)
*/
public void debug(Object message) {
if (getLogger().isDebugEnabled()) {
getLogger().debug(String.valueOf(message));
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.error.
*
* @param message to log
* @param t log this cause
* @see org.apache.commons.logging.Log#error(Object, Throwable)
*/
public void error(Object message, Throwable t) {
if (getLogger().isErrorEnabled()) {
getLogger().error(String.valueOf(message), t);
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.error.
*
* @param message to log
* @see org.apache.commons.logging.Log#error(Object)
*/
public void error(Object message) {
if (getLogger().isErrorEnabled()) {
getLogger().error(String.valueOf(message));
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.fatalError.
*
* @param message to log.
* @param t log this cause.
* @see org.apache.commons.logging.Log#fatal(Object, Throwable)
*/
public void fatal(Object message, Throwable t) {
if (getLogger().isFatalErrorEnabled()) {
getLogger().fatalError(String.valueOf(message), t);
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.fatalError.
*
* @param message to log
* @see org.apache.commons.logging.Log#fatal(Object)
*/
public void fatal(Object message) {
if (getLogger().isFatalErrorEnabled()) {
getLogger().fatalError(String.valueOf(message));
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.info.
*
* @param message to log
* @param t log this cause
* @see org.apache.commons.logging.Log#info(Object, Throwable)
*/
public void info(Object message, Throwable t) {
if (getLogger().isInfoEnabled()) {
getLogger().info(String.valueOf(message), t);
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.info.
*
* @param message to log
* @see org.apache.commons.logging.Log#info(Object)
*/
public void info(Object message) {
if (getLogger().isInfoEnabled()) {
getLogger().info(String.valueOf(message));
}
}
/**
* Is logging to org.apache.avalon.framework.logger.Logger.debug enabled?
* @see org.apache.commons.logging.Log#isDebugEnabled()
*/
public boolean isDebugEnabled() {
return getLogger().isDebugEnabled();
}
/**
* Is logging to org.apache.avalon.framework.logger.Logger.error enabled?
* @see org.apache.commons.logging.Log#isErrorEnabled()
*/
public boolean isErrorEnabled() {
return getLogger().isErrorEnabled();
}
/**
* Is logging to org.apache.avalon.framework.logger.Logger.fatalError enabled?
* @see org.apache.commons.logging.Log#isFatalEnabled()
*/
public boolean isFatalEnabled() {
return getLogger().isFatalErrorEnabled();
}
/**
* Is logging to org.apache.avalon.framework.logger.Logger.info enabled?
* @see org.apache.commons.logging.Log#isInfoEnabled()
*/
public boolean isInfoEnabled() {
return getLogger().isInfoEnabled();
}
/**
* Is logging to org.apache.avalon.framework.logger.Logger.debug enabled?
* @see org.apache.commons.logging.Log#isTraceEnabled()
*/
public boolean isTraceEnabled() {
return getLogger().isDebugEnabled();
}
/**
* Is logging to org.apache.avalon.framework.logger.Logger.warn enabled?
* @see org.apache.commons.logging.Log#isWarnEnabled()
*/
public boolean isWarnEnabled() {
return getLogger().isWarnEnabled();
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.debug.
*
* @param message to log.
* @param t log this cause.
* @see org.apache.commons.logging.Log#trace(Object, Throwable)
*/
public void trace(Object message, Throwable t) {
if (getLogger().isDebugEnabled()) {
getLogger().debug(String.valueOf(message), t);
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.debug.
*
* @param message to log
* @see org.apache.commons.logging.Log#trace(Object)
*/
public void trace(Object message) {
if (getLogger().isDebugEnabled()) {
getLogger().debug(String.valueOf(message));
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.warn.
*
* @param message to log
* @param t log this cause
* @see org.apache.commons.logging.Log#warn(Object, Throwable)
*/
public void warn(Object message, Throwable t) {
if (getLogger().isWarnEnabled()) {
getLogger().warn(String.valueOf(message), t);
}
}
/**
* Logs a message with org.apache.avalon.framework.logger.Logger.warn.
*
* @param message to log
* @see org.apache.commons.logging.Log#warn(Object)
*/
public void warn(Object message) {
if (getLogger().isWarnEnabled()) {
getLogger().warn(String.valueOf(message));
}
}
}