/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.ejb3.component;
import javax.ejb.Timer;
import javax.ejb.TimerService;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* A registry to which individual {@link javax.ejb.TimerService timer services} can register to (and un-register from). The main purpose
* of this registry is to provide an implementation of {@link #getAllActiveTimers()} which returns all
* {@link javax.ejb.TimerService#getTimers() active timers} after querying each of the {@link javax.ejb.TimerService timer services} registered
* with this {@link TimerServiceRegistry registry}.
* <p/>
* Typical use of this registry is to maintain one instance of this registry, per deployment unit (also known as EJB module) and register the timer
* services of all EJB components that belong to that deployment unit. Effectively, such an instance can then be used to fetch all active timers
* that are applicable to that deployment unit (a.k.a EJB module).
*
* @author Jaikiran Pai
*/
public class TimerServiceRegistry {
private final Set<TimerService> timerServices = Collections.synchronizedSet(new HashSet<TimerService>());
public void registerTimerService(final TimerService timerService) {
if (timerService == null) {
return;
}
timerServices.add(timerService);
}
public boolean unRegisterTimerService(final TimerService timerService) {
if (timerService == null) {
return false;
}
return timerServices.remove(timerService);
}
public Collection<Timer> getAllActiveTimers() {
final Collection<Timer> activeTimers = new HashSet<>();
synchronized (timerServices) {
for (final TimerService timerService : timerServices) {
activeTimers.addAll(timerService.getTimers());
}
}
return activeTimers;
}
}