/**
* 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.hadoop.gateway.i18n.messages.loggers.log4j;
import org.apache.hadoop.gateway.i18n.messages.MessageLevel;
import org.apache.hadoop.gateway.i18n.messages.MessageLogger;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.LocationInfo;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.spi.ThrowableInformation;
public class Log4jMessageLogger implements MessageLogger {
private static String CLASS_NAME = Log4jMessageLogger.class.getName();
private Logger logger;
Log4jMessageLogger( Logger logger ) {
this.logger = logger;
}
@Override
public final boolean isLoggable( final MessageLevel level ) {
return logger.isEnabledFor( toLevel( level ) );
}
@Override
public final void log( final StackTraceElement caller, final MessageLevel messageLevel, final String messageId, final String messageText, final Throwable thrown ) {
LoggingEvent event = new LoggingEvent(
/* String fqnOfCategoryClass */ CLASS_NAME,
/* Category logger */ logger,
/* long timeStamp */ System.currentTimeMillis(),
/* Level level */ toLevel( messageLevel ),
/* Object message */ messageText,
/* String threadName */ Thread.currentThread().getName(),
/* ThrowableInformation throwable */ toThrownInformation( thrown ),
/* String ndc */ null,
/* LocationInfo info */ toLocationInfo( caller ),
/* java.util.Map properties */ null );
logger.callAppenders( event );
}
private static final ThrowableInformation toThrownInformation( final Throwable thrown ) {
ThrowableInformation info = null;
if( thrown != null ) {
info = new ThrowableInformation( thrown );
}
return info;
}
private static final LocationInfo toLocationInfo( final StackTraceElement caller ) {
LocationInfo info = null;
if( caller != null ) {
info = new LocationInfo( caller.getFileName(), caller.getClassName(), caller.getMethodName(), Integer.toString(caller.getLineNumber()) );
}
return info;
}
private static final Level toLevel( final MessageLevel level ) {
switch( level ) {
case FATAL: return Level.FATAL;
case ERROR: return Level.ERROR;
case WARN: return Level.WARN;
case INFO: return Level.INFO;
case DEBUG: return Level.DEBUG;
case TRACE: return Level.TRACE;
default: return Level.OFF;
}
}
}