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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.qpid.shutdown;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
/**
* Implementation of the JMX broker shutdown plugin.
*/
public class Shutdown implements ShutdownMBean
{
private static final Logger _logger = Logger.getLogger(Shutdown.class);
private static final String FORMAT = "yyyyy/MM/dd hh:mm:ss";
private static final int THREAD_COUNT = 1;
private static final ScheduledExecutorService EXECUTOR = new ScheduledThreadPoolExecutor(THREAD_COUNT);
private final Runnable _shutdown = new SystemExiter();
/** @see ShutdownMBean#shutdown() */
public void shutdown()
{
_logger.info("Shutting down at user's request");
shutdownBroker(0);
}
/** @see ShutdownMBean#shutdown(long) */
public void shutdown(long delay)
{
_logger.info("Scheduled broker shutdown after " + delay + "ms");
shutdownBroker(delay);
}
/** @see ShutdownMBean#shutdownAt(String) */
public void shutdownAt(String when)
{
Date date;
DateFormat df = new SimpleDateFormat(FORMAT);
try
{
date = df.parse(when);
}
catch (ParseException e)
{
_logger.error("Invalid date \"" + when + "\": expecting " + FORMAT, e);
return;
}
_logger.info("Scheduled broker shutdown at " + when);
long now = System.currentTimeMillis();
long time = date.getTime();
if (time > now)
{
shutdownBroker(time - now);
}
else
{
shutdownBroker(0);
}
}
/**
* Submits the {@link SystemExiter} job to shutdown the broker.
*/
private void shutdownBroker(long delay)
{
EXECUTOR.schedule(_shutdown, delay, TimeUnit.MILLISECONDS);
}
/**
* Shutting down the system in another thread to avoid JMX exceptions being thrown.
*/
class SystemExiter implements Runnable
{
public void run()
{
System.exit(0);
}
}
}
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