Package org.jboss.ejb3.stateful

Source Code of org.jboss.ejb3.stateful.SessionSynchronizationInterceptor

/*
* 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 java.rmi.RemoteException;

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 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.tx.TxUtil;
import org.jboss.logging.Logger;

/**
* Comment
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 90524 $
*/
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()
      {
         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);
           
            bean.beforeCompletion();
         }
         catch (RemoteException e)
         {
            throw new RuntimeException(e);
         }
         finally
         {
            AllowedOperationsAssociation.popInMethodFlag();
            popEnc();
         }
      }

      public void afterCompletion(int status)
      {
         ctx.setTxSynchronized(false);
         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
         {
            if (status == Status.STATUS_COMMITTED)
            {
               bean.afterCompletion(true);
            }
            else
            {
               bean.afterCompletion(false);
            }
         }
         catch (RemoteException 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();
   }
}
TOP

Related Classes of org.jboss.ejb3.stateful.SessionSynchronizationInterceptor

TOP
Copyright © 2018 www.massapi.com. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.