/*
* Copyright 2002-2009 the original author or authors.
*
* Licensed 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.springframework.scheduling.commonj;
import java.util.LinkedList;
import java.util.List;
import javax.naming.NamingException;
import commonj.timers.Timer;
import commonj.timers.TimerManager;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.Lifecycle;
/**
* {@link org.springframework.beans.factory.FactoryBean} that retrieves a
* CommonJ {@link commonj.timers.TimerManager} and exposes it for bean references.
*
* <p><b>This is the central convenience class for setting up a
* CommonJ TimerManager in a Spring context.</b>
*
* <p>Allows for registration of ScheduledTimerListeners. This is the main
* purpose of this class; the TimerManager itself could also be fetched
* from JNDI via {@link org.springframework.jndi.JndiObjectFactoryBean}.
* In scenarios that just require static registration of tasks at startup,
* there is no need to access the TimerManager itself in application code.
*
* <p>Note that the TimerManager uses a TimerListener instance that is
* shared between repeated executions, in contrast to Quartz which
* instantiates a new Job for each execution.
*
* @author Juergen Hoeller
* @since 2.0
* @see ScheduledTimerListener
* @see commonj.timers.TimerManager
* @see commonj.timers.TimerListener
*/
public class TimerManagerFactoryBean extends TimerManagerAccessor
implements FactoryBean<TimerManager>, InitializingBean, DisposableBean, Lifecycle {
private ScheduledTimerListener[] scheduledTimerListeners;
private final List<Timer> timers = new LinkedList<Timer>();
/**
* Register a list of ScheduledTimerListener objects with the TimerManager
* that this FactoryBean creates. Depending on each ScheduledTimerListener's settings,
* it will be registered via one of TimerManager's schedule methods.
* @see commonj.timers.TimerManager#schedule(commonj.timers.TimerListener, long)
* @see commonj.timers.TimerManager#schedule(commonj.timers.TimerListener, long, long)
* @see commonj.timers.TimerManager#scheduleAtFixedRate(commonj.timers.TimerListener, long, long)
*/
public void setScheduledTimerListeners(ScheduledTimerListener[] scheduledTimerListeners) {
this.scheduledTimerListeners = scheduledTimerListeners;
}
//---------------------------------------------------------------------
// Implementation of InitializingBean interface
//---------------------------------------------------------------------
public void afterPropertiesSet() throws NamingException {
super.afterPropertiesSet();
if (this.scheduledTimerListeners != null) {
TimerManager timerManager = getTimerManager();
for (ScheduledTimerListener scheduledTask : this.scheduledTimerListeners) {
Timer timer;
if (scheduledTask.isOneTimeTask()) {
timer = timerManager.schedule(scheduledTask.getTimerListener(), scheduledTask.getDelay());
}
else {
if (scheduledTask.isFixedRate()) {
timer = timerManager.scheduleAtFixedRate(
scheduledTask.getTimerListener(), scheduledTask.getDelay(), scheduledTask.getPeriod());
}
else {
timer = timerManager.schedule(
scheduledTask.getTimerListener(), scheduledTask.getDelay(), scheduledTask.getPeriod());
}
}
this.timers.add(timer);
}
}
}
//---------------------------------------------------------------------
// Implementation of FactoryBean interface
//---------------------------------------------------------------------
public TimerManager getObject() {
return getTimerManager();
}
public Class<? extends TimerManager> getObjectType() {
TimerManager timerManager = getTimerManager();
return (timerManager != null ? timerManager.getClass() : TimerManager.class);
}
public boolean isSingleton() {
return true;
}
//---------------------------------------------------------------------
// Implementation of DisposableBean interface
//---------------------------------------------------------------------
/**
* Cancels all statically registered Timers on shutdown,
* and stops the underlying TimerManager (if not shared).
* @see commonj.timers.Timer#cancel()
* @see commonj.timers.TimerManager#stop()
*/
@Override
public void destroy() {
// Cancel all registered timers.
for (Timer timer : this.timers) {
try {
timer.cancel();
}
catch (Throwable ex) {
logger.warn("Could not cancel CommonJ Timer", ex);
}
}
this.timers.clear();
// Stop the TimerManager itself.
super.destroy();
}
}
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