/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, 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.ejb.plugins;
import org.jboss.ejb.EnterpriseContext;
import org.jboss.ejb.InstancePool;
import org.jboss.ejb.MessageDrivenContainer;
import org.jboss.ejb.AllowedOperationsAssociation;
import org.jboss.invocation.Invocation;
import javax.ejb.EJBException;
import javax.ejb.TimedObject;
import javax.ejb.Timer;
import java.rmi.RemoteException;
import java.lang.reflect.Method;
/**
* This container acquires the given instance. This must be used after
* the EnvironmentInterceptor, since acquiring instances requires a proper
* JNDI environment to be set.
*
* @author <a href="mailto:peter.antman@tim.se">Peter Antman</a>.
* @author <a href="mailto:rickard.oberg@telkel.com">Rickard Oberg</a>
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
* @version $Revision: 81030 $
*/
public class MessageDrivenInstanceInterceptor
extends AbstractInterceptor
{
/** A reference to {@link javax.ejb.TimedObject#ejbTimeout}. */
protected static final Method ejbTimeout;
static
{
try
{
ejbTimeout = TimedObject.class.getMethod("ejbTimeout", new Class[]{Timer.class});
}
catch (Exception e)
{
throw new ExceptionInInitializerError(e);
}
}
/**
* Message driven beans do not have homes.
*
* @throws Error Not valid for MessageDriven beans.
*/
public Object invokeHome(final Invocation mi)
throws Exception
{
throw new Error("Not valid for MessageDriven beans");
}
// Interceptor implementation --------------------------------------
public Object invoke(final Invocation mi)
throws Exception
{
// Get context
MessageDrivenContainer mdc = (MessageDrivenContainer) container;
InstancePool pool = mdc.getInstancePool();
EnterpriseContext ctx = null;
try
{
ctx = pool.get();
}
catch (EJBException e)
{
throw e;
}
catch (Exception e)
{
throw new EJBException("Unable to get an instance from the pool", e);
}
// Set the current security information
ctx.setPrincipal(mi.getPrincipal());
// Use this context
mi.setEnterpriseContext(ctx);
// Set the JACC EnterpriseBean PolicyContextHandler data
EnterpriseBeanPolicyContextHandler.setEnterpriseBean(ctx.getInstance());
if (ejbTimeout.equals(mi.getMethod()))
AllowedOperationsAssociation.pushInMethodFlag(IN_EJB_TIMEOUT);
else
AllowedOperationsAssociation.pushInMethodFlag(IN_BUSINESS_METHOD);
// There is no need for synchronization since the instance is always
// fresh also there should never be a tx associated with the instance.
try
{
// Invoke through interceptors
Object obj = getNext().invoke(mi);
return obj;
}
catch (RuntimeException e) // Instance will be GC'ed at MI return
{
mi.setEnterpriseContext(null);
throw e;
}
catch (RemoteException e) // Instance will be GC'ed at MI return
{
mi.setEnterpriseContext(null);
throw e;
}
catch (Error e) // Instance will be GC'ed at MI return
{
mi.setEnterpriseContext(null);
throw e;
}
finally
{
AllowedOperationsAssociation.popInMethodFlag();
EnterpriseBeanPolicyContextHandler.setEnterpriseBean(null);
// Return context
if (mi.getEnterpriseContext() != null)
{
pool.free((EnterpriseContext) mi.getEnterpriseContext());
}
else
{
pool.discard(ctx);
}
}
}
}