/*
* 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.log.output.lf5;
import org.apache.log.LogEvent;
import org.apache.log.LogTarget;
import org.apache.log.format.Formatter;
import org.apache.log.format.PatternFormatter;
import org.apache.log4j.lf5.viewer.LogBrokerMonitor;
/**
* A {@link LogTarget} that displays log events using the
* <a href="http://jakarta.apache.org/log4j/docs/lf5/overview.html">LogFactor5</a>
* Swing GUI.
*
* @author <a href="sylvain@apache.org">Sylvain Wallez</a>
* @version $Id: LF5LogTarget.java 506267 2007-02-12 04:06:06Z crossley $
*/
public class LF5LogTarget implements LogTarget
{
/** Common monitor */
private static LogBrokerMonitor c_defaultLogMonitor;
/** Default context map formatter */
private static Formatter c_defaultContextFormatter = new PatternFormatter( "" );
/** Monitor for this LogTarget */
private LogBrokerMonitor m_monitor;
/** Format for context maps */
private Formatter m_contextFormatter = c_defaultContextFormatter;
/**
* Create a <code>LogFactorLogTarget</code> on a given <code>LogBrokerMonitor</code>.
* @param monitor the monitor
*/
public LF5LogTarget( final LogBrokerMonitor monitor )
{
m_monitor = monitor;
}
/**
* Create <code>LogFactorLogTarget</code> on the default <code>LogBrokerMonitor</code>.
*/
public LF5LogTarget()
{
// Creation of m_monitor is deferred up to the first call to processEvent().
// This allows the Swing window to pop up only if this target is actually used.
}
/**
* Sets the {@link Formatter} that will be used to produce the "NDC" (nested diagnostic
* context) text on the GUI.
* @param formatter the message formatter
*/
public void setNDCFormatter( final Formatter formatter )
{
m_contextFormatter = formatter;
}
/**
* Get the default <code>LogBrokerMonitor</code> instance.
*
* @return the monitor
*/
public static synchronized LogBrokerMonitor getDefaultMonitor()
{
if( null == c_defaultLogMonitor )
{
c_defaultLogMonitor = new LogBrokerMonitor( LogKitLogRecord.LOGKIT_LOGLEVELS );
c_defaultLogMonitor.setFontSize( 12 );
c_defaultLogMonitor.show();
}
return c_defaultLogMonitor;
}
/**
* Process a log event.
*
* @param event the log event
*/
public void processEvent( final LogEvent event )
{
if( null == m_monitor )
{
m_monitor = getDefaultMonitor();
}
m_monitor.addMessage( new LogKitLogRecord( event, m_contextFormatter ) );
}
}