package bboss.org.apache.velocity.runtime.log;
/*
* 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.
*/
import java.util.Vector;
import java.util.Iterator;
import bboss.org.apache.velocity.runtime.RuntimeServices;
/**
* Pre-init logger. I believe that this was suggested by
* Carsten Ziegeler <cziegeler@sundn.de> and
* Jeroen C. van Gelderen. If this isn't correct, let me
* know as this was a good idea...
*
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @author <a href="mailto:nbubna@apache.org">Nathan Bubna</a>
* @version $Id: HoldingLogChute.java 730039 2008-12-30 03:53:19Z byron $
* @since 1.5
*/
class HoldingLogChute implements LogChute
{
private Vector pendingMessages = new Vector();
private volatile boolean transferring = false;
/**
* @see bboss.org.apache.velocity.runtime.log.LogChute#init(bboss.org.apache.velocity.runtime.RuntimeServices)
*/
public void init(RuntimeServices rs) throws Exception
{
}
/**
* Logs messages. All we do is store them until 'later'.
*
* @param level severity level
* @param message complete error message
*/
public synchronized void log(int level, String message)
{
if (!transferring)
{
Object[] data = new Object[2];
data[0] = new Integer(level);
data[1] = message;
pendingMessages.addElement(data);
}
}
/**
* Logs messages and errors. All we do is store them until 'later'.
*
* @param level severity level
* @param message complete error message
* @param t the accompanying java.lang.Throwable
*/
public synchronized void log(int level, String message, Throwable t)
{
if (!transferring)
{
Object[] data = new Object[3];
data[0] = new Integer(level);
data[1] = message;
data[2] = t;
pendingMessages.addElement(data);
}
}
/**
* @see bboss.org.apache.velocity.runtime.log.LogChute#isLevelEnabled(int)
*/
public boolean isLevelEnabled(int level)
{
return true;
}
/**
* Dumps the log messages this chute is holding into a new chute
* @param newChute
*/
public synchronized void transferTo(LogChute newChute)
{
if (!transferring && !pendingMessages.isEmpty())
{
// let the other methods know what's up
transferring = true;
// iterate and log each individual message...
for(Iterator i = pendingMessages.iterator(); i.hasNext();)
{
Object[] data = (Object[])i.next();
int level = ((Integer)data[0]).intValue();
String message = (String)data[1];
if (data.length == 2)
{
newChute.log(level, message);
}
else
{
newChute.log(level, message, (Throwable)data[2]);
}
}
}
}
}