/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, 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.ejb3.stateful;
import org.jboss.aop.advice.Interceptor;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.ejb.AllowedOperationsAssociation;
import org.jboss.ejb3.BeanContext;
import org.jboss.ejb3.context.CurrentInvocationContext;
import org.jboss.ejb3.context.base.BaseSessionInvocationContext;
import org.jboss.ejb3.context.spi.InvocationContext;
import org.jboss.ejb3.context.spi.SessionInvocationContext;
import org.jboss.ejb3.tx.TxUtil;
import org.jboss.logging.Logger;
import javax.ejb.EJBException;
import javax.ejb.SessionSynchronization;
import javax.transaction.RollbackException;
import javax.transaction.Status;
import javax.transaction.Synchronization;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import java.rmi.RemoteException;
/**
* Comment
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 102482 $
*/
public class SessionSynchronizationInterceptor implements Interceptor
{
private static final Logger log = Logger.getLogger(SessionSynchronizationInterceptor.class);
private TransactionManager tm;
public SessionSynchronizationInterceptor()
{
this.tm = TxUtil.getTransactionManager();
}
public String getName()
{
return null;
}
protected static class SFSBSessionSynchronization implements Synchronization
{
private StatefulBeanContext ctx;
public SFSBSessionSynchronization(StatefulBeanContext ctx)
{
this.ctx = ctx;
}
public void beforeCompletion()
{
final SessionSynchronization bean = (SessionSynchronization) ctx.getInstance();
// The bean might be lost in action if an exception is thrown in afterBegin
if(bean == null)
return;
pushEnc();
try
{
// FIXME: This is a dirty hack to notify AS EJBTimerService about what's going on
AllowedOperationsAssociation.pushInMethodFlag(AllowedOperationsAssociation.IN_BEFORE_COMPLETION);
// TODO: use interceptors to setup a context
SessionInvocationContext invocation = new BaseSessionInvocationContext(null, null, null) {
@Override
public Object proceed() throws Exception
{
bean.beforeCompletion();
return null;
}
};
invocation.setEJBContext(ctx.getEJBContext());
CurrentInvocationContext.push(invocation);
try
{
invocation.proceed();
}
finally
{
CurrentInvocationContext.pop();
}
}
catch(RuntimeException e)
{
throw e;
}
catch(Exception e)
{
throw new RuntimeException(e);
}
finally
{
AllowedOperationsAssociation.popInMethodFlag();
popEnc();
}
}
public void afterCompletion(final int status)
{
ctx.setTxSynchronized(false);
final SessionSynchronization bean = (SessionSynchronization) ctx.getInstance();
// The bean might be lost in action if an exception is thrown in afterBegin
if(bean == null)
return;
pushEnc();
try
{
// TODO: use interceptors to setup a context
SessionInvocationContext invocation = new BaseSessionInvocationContext(null, null, null) {
@Override
public Object proceed() throws Exception
{
if (status == Status.STATUS_COMMITTED)
{
bean.afterCompletion(true);
}
else
{
bean.afterCompletion(false);
}
return null;
}
};
invocation.setEJBContext(ctx.getEJBContext());
CurrentInvocationContext.push(invocation);
try
{
invocation.proceed();
}
finally
{
CurrentInvocationContext.pop();
}
}
catch(RuntimeException e)
{
throw e;
}
catch (Exception ignore)
{
}
finally
{
popEnc();
StatefulContainer container = (StatefulContainer) ctx.getContainer();
container.getCache().release(ctx);
}
}
private void popEnc()
{
StatefulContainer container = ctx.getContainer();
BeanContext<?> old = container.popContext();
assert old == ctx;
container.popEnc();
}
private void pushEnc()
{
StatefulContainer container = ctx.getContainer();
container.pushEnc();
container.pushContext(ctx);
}
}
protected void registerSessionSynchronization(StatefulBeanContext ctx) throws RemoteException, SystemException
{
if (ctx.isTxSynchronized()) return;
Transaction tx = tm.getTransaction();
if (tx == null) return;
// tx.registerSynchronization will throw RollbackException, so no go
if (tx.getStatus() == Status.STATUS_MARKED_ROLLBACK) return;
SFSBSessionSynchronization synch = new SFSBSessionSynchronization(ctx);
try
{
ctx.registerSynchronization(tx, synch);
}
catch(RollbackException e)
{
log.warn("Unexpected RollbackException from tx " + tx + " with status " + tx.getStatus());
throw new EJBException(e);
}
// Notify StatefulInstanceInterceptor that the synch will take care of the release.
ctx.setTxSynchronized(true);
SessionSynchronization bean = (SessionSynchronization) ctx.getInstance();
// EJB 3 4.3.7 paragraph 2
bean.afterBegin();
}
public Object invoke(Invocation invocation) throws Throwable
{
StatefulContainerInvocation ejb = (StatefulContainerInvocation) invocation;
StatefulBeanContext target = (StatefulBeanContext) ejb.getBeanContext();
if (target.getInstance() instanceof SessionSynchronization)
{
registerSessionSynchronization(target);
}
return ejb.invokeNext();
}
}