/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.tomcat.util.qlog;
import java.io.Writer;
import java.io.StringWriter;
import java.io.PrintWriter;
import java.util.Date;
import org.apache.tomcat.util.collections.SimplePool;
import org.apache.tomcat.util.collections.Queue;
/**
* The daemon thread that looks in a queue and if it is not empty
* writes out everything in the queue to the sink.
*/
public final class LogDaemon implements Runnable {
private boolean shouldStop=false;
private Thread logDaemonThread = null;
private Queue logQueue = null;
public LogDaemon() {
}
public void start() {
// already running
if( logDaemonThread!=null) return;
logQueue = new Queue();
logDaemonThread=new Thread(this);
logDaemonThread.setName("QueueLogDaemon");
// Don't set it as daemon - we don't want tomcat to exit
// logDaemonThread.setDaemon(true);
shouldStop=false;
logDaemonThread.start();
}
public void stop() {
if( shouldStop ) return;
shouldStop=true;
// wait for it to finish
logQueue.stop(); // unblock
logDaemonThread=null;
logQueue=null;
}
public boolean isStarted() {
return logDaemonThread!=null;
}
public void add(LogEntry logE ) {
if( logQueue!=null ) {
logQueue.put( logE );
} else {
// We're not started, do it synchronously
logE.getLogger().log( logE );
}
}
public void run() {
while (true) {
// Will block !
LogEntry logEntry =
(LogEntry)logQueue.pull();
if( shouldStop ) return;
logEntry.getLogger().log( logEntry );
if( shouldStop ) return;
}
}
}