/*
* 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.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.jboss.as.clustering.infinispan.distribution.Locality;
import org.wildfly.clustering.ee.Batch;
import org.wildfly.clustering.ee.Batcher;
import org.wildfly.clustering.ee.infinispan.TransactionBatch;
import org.wildfly.clustering.ejb.Time;
import org.wildfly.clustering.ejb.infinispan.logging.InfinispanEjbLogger;
/**
* Schedules a bean for expiration.
*
* @author Paul Ferraro
*
* @param <G> the group identifier type
* @param <I> the bean identifier type
* @param <T> the bean type
*/
public class BeanExpirationScheduler<G, I, T> implements Scheduler<I> {
final Map<I, Future<?>> expirationFutures = new ConcurrentHashMap<>();
final Batcher<TransactionBatch> batcher;
final BeanRemover<I, T> remover;
final ExpirationConfiguration<T> expiration;
public BeanExpirationScheduler(Batcher<TransactionBatch> batcher, BeanRemover<I, T> remover, ExpirationConfiguration<T> expiration) {
this.batcher = batcher;
this.remover = remover;
this.expiration = expiration;
}
@Override
public void schedule(I id) {
Time timeout = this.expiration.getTimeout();
long value = timeout.getValue();
if (value >= 0) {
TimeUnit unit = timeout.getUnit();
InfinispanEjbLogger.ROOT_LOGGER.tracef("Scheduling stateful session bean %s to expire in %d %s", id, value, unit);
Runnable task = new ExpirationTask(id);
// Make sure the expiration future map insertion happens before map removal (during task execution).
synchronized (task) {
this.expirationFutures.put(id, this.expiration.getExecutor().schedule(task, value, unit));
}
}
}
@Override
public void cancel(I id) {
Future<?> future = this.expirationFutures.remove(id);
if (future != null) {
future.cancel(false);
}
}
@Override
public void cancel(Locality locality) {
for (I id: this.expirationFutures.keySet()) {
if (!locality.isLocal(id)) {
this.cancel(id);
}
}
}
@Override
public void close() {
for (Future<?> future: this.expirationFutures.values()) {
future.cancel(false);
}
for (Future<?> future: this.expirationFutures.values()) {
if (!future.isDone()) {
try {
future.get();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} catch (ExecutionException e) {
// Ignore
}
}
}
this.expirationFutures.clear();
}
private class ExpirationTask implements Runnable {
private final I id;
public ExpirationTask(I id) {
this.id = id;
}
@Override
public void run() {
InfinispanEjbLogger.ROOT_LOGGER.tracef("Expiring stateful session bean %s", this.id);
try {
Batch batch = BeanExpirationScheduler.this.batcher.createBatch();
boolean success = false;
try {
BeanExpirationScheduler.this.remover.remove(this.id, BeanExpirationScheduler.this.expiration.getRemoveListener());
success = true;
} catch (Throwable e) {
InfinispanEjbLogger.ROOT_LOGGER.failedToExpireBean(e, this.id);
} finally {
if (success) {
batch.close();
} else {
batch.discard();
}
}
} finally {
synchronized (this) {
BeanExpirationScheduler.this.expirationFutures.remove(this.id);
}
}
}
}
}