/*
* JBoss, Home of Professional Open Source.
* Copyright (c) 2011, 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.stateful;
import org.jboss.as.ejb3.component.AbstractEJBInterceptor;
import org.jboss.invocation.InterceptorContext;
import javax.ejb.AccessTimeout;
import javax.ejb.ConcurrentAccessTimeoutException;
import javax.ejb.EJBException;
import javax.transaction.Synchronization;
import javax.transaction.TransactionSynchronizationRegistry;
import java.util.concurrent.locks.ReentrantLock;
import static org.jboss.as.ejb3.component.stateful.ComponentInstanceInterceptor.getComponentInstance;
/**
* @author <a href="mailto:cdewolf@redhat.com">Carlo de Wolf</a>
*/
public class StatefulSessionSynchronizationInterceptor extends AbstractEJBInterceptor {
private final ReentrantLock lock = new ReentrantLock(true);
private Object transactionKey = null;
@Override
public Object processInvocation(InterceptorContext context) throws Exception {
final StatefulSessionComponent component = getComponent(context, StatefulSessionComponent.class);
final StatefulSessionComponentInstance instance = getComponentInstance(context);
// TODO: per method
AccessTimeout timeout = component.getAccessTimeout();
boolean acquired = lock.tryLock(timeout.value(), timeout.unit());
if(!acquired) {
throw new ConcurrentAccessTimeoutException("EJB 3.1 FR 4.3.14.1 concurrent access timeout on " + context
+ " - could not obtain lock within " + timeout.value() + timeout.unit());
}
TransactionSynchronizationRegistry transactionSynchronizationRegistry = component.getTransactionSynchronizationRegistry();
Object currentTransactionKey = transactionSynchronizationRegistry.getTransactionKey();
if(transactionKey != null) {
if(!transactionKey.equals(currentTransactionKey))
throw new EJBException("EJB 3.1 FR 4.6 Stateful instance " + instance + " is already associated with tx " + transactionKey + " (current tx " + currentTransactionKey + ")");
} else {
if(currentTransactionKey != null) {
transactionSynchronizationRegistry.registerInterposedSynchronization(new Synchronization() {
@Override
public void beforeCompletion() {
// TODO: beforeCompletion callbacks on SessionSynchronization
}
@Override
public void afterCompletion(int status) {
// TODO: afterCompletion callbacks on SessionSynchronization
release(instance);
}
});
// TODO: afterBegin callbacks on SessionSynchronization
transactionKey = currentTransactionKey;
}
}
try {
return context.proceed();
}
finally {
if(currentTransactionKey == null)
release(instance);
}
}
private void release(final StatefulSessionComponentInstance instance) {
// TODO: remove
instance.getComponent().getCache().release(instance);
transactionKey = null;
lock.unlock();
}
}