/*
* 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.wildfly.clustering.ejb.infinispan;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import org.wildfly.clustering.dispatcher.CommandDispatcher;
import org.wildfly.clustering.dispatcher.CommandDispatcherFactory;
import org.wildfly.clustering.ee.Batcher;
import org.wildfly.clustering.ee.infinispan.Evictor;
import org.wildfly.clustering.ee.infinispan.TransactionBatch;
import org.wildfly.clustering.ejb.infinispan.logging.InfinispanEjbLogger;
import org.wildfly.clustering.infinispan.spi.distribution.Locality;
/**
* Schedules a bean for eviction.
*
* @author Paul Ferraro
*
* @param <G> the group identifier type
* @param <I> the bean identifier type
* @param <T> the bean type
*/
public class BeanGroupEvictionScheduler<I> implements Scheduler<I>, BeanGroupEvictionContext<I> {
private final Set<I> evictionQueue = new LinkedHashSet<>();
private final Batcher<TransactionBatch> batcher;
private final Evictor<I> evictor;
private final CommandDispatcher<BeanGroupEvictionContext<I>> dispatcher;
private final PassivationConfiguration<?> config;
public BeanGroupEvictionScheduler(String name, Batcher<TransactionBatch> batcher, Evictor<I> evictor, CommandDispatcherFactory dispatcherFactory, PassivationConfiguration<?> config) {
this.batcher = batcher;
this.evictor = evictor;
this.config = config;
this.dispatcher = dispatcherFactory.<BeanGroupEvictionContext<I>>createCommandDispatcher(name, this);
}
@Override
public Batcher<TransactionBatch> getBatcher() {
return this.batcher;
}
@Override
public Evictor<I> getEvictor() {
return this.evictor;
}
@Override
public void cancel(I id) {
synchronized (this.evictionQueue) {
this.evictionQueue.remove(id);
}
}
@Override
public void cancel(Locality locality) {
synchronized (this.evictionQueue) {
Iterator<I> groups = this.evictionQueue.iterator();
while (groups.hasNext()) {
if (Thread.currentThread().isInterrupted()) break;
I id = groups.next();
if (!locality.isLocal(id)) {
groups.remove();
}
}
}
}
@Override
public void schedule(I id) {
synchronized (this.evictionQueue) {
this.evictionQueue.add(id);
// Trigger eviction of oldest bean if necessary
if (this.evictionQueue.size() > this.config.getConfiguration().getMaxSize()) {
Iterator<I> groups = this.evictionQueue.iterator();
I group = groups.next();
try {
this.dispatcher.submitOnCluster(new BeanGroupEvictionCommand<>(group));
groups.remove();
} catch (Exception e) {
InfinispanEjbLogger.ROOT_LOGGER.failedToPassivateBean(e, group);
}
}
}
}
@Override
public void close() {
synchronized (this.evictionQueue) {
this.evictionQueue.clear();
}
this.dispatcher.close();
}
}