/*
* 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 java.lang.reflect.Method;
import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.TimedObject;
import javax.ejb.Timer;
import org.jboss.ejb.AllowedOperationsAssociation;
import org.jboss.ejb.Container;
import org.jboss.ejb.EnterpriseContext;
import org.jboss.ejb.InstancePool;
import org.jboss.ejb.StatelessSessionContainer;
import org.jboss.ejb.StatelessSessionEnterpriseContext;
import org.jboss.invocation.Invocation;
import org.jboss.invocation.InvocationKey;
import org.jboss.invocation.InvocationType;
/**
* 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 Rickard Oberg
* @author Scott.Stark@jboss.org
* @version $Revision: 81030 $
*/
public class StatelessSessionInstanceInterceptor
extends AbstractInterceptor
{
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
protected StatelessSessionContainer container;
// Static --------------------------------------------------------
/** 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);
}
}
// Constructors --------------------------------------------------
// Public --------------------------------------------------------
public void setContainer(final Container container)
{
super.setContainer(container);
this.container = (StatelessSessionContainer)container;
}
// Interceptor implementation --------------------------------------
public Object invokeHome(final Invocation mi) throws Exception
{
InstancePool pool = container.getInstancePool();
StatelessSessionEnterpriseContext ctx = null;
try
{
// Acquire an instance in case the ejbCreate throws a CreateException
ctx = (StatelessSessionEnterpriseContext) pool.get();
mi.setEnterpriseContext(ctx);
// Dispatch the method to the container
return getNext().invokeHome(mi);
}
finally
{
mi.setEnterpriseContext(null);
// If an instance was created, return it to the pool
if( ctx != null )
pool.free(ctx);
}
}
public Object invoke(final Invocation mi) throws Exception
{
// Get context
InstancePool pool = container.getInstancePool();
StatelessSessionEnterpriseContext ctx = null;
try
{
ctx = (StatelessSessionEnterpriseContext) pool.get();
}
catch (EJBException e)
{
throw e;
}
catch (RemoteException e)
{
throw e;
}
catch (Exception e)
{
InvocationType type = mi.getType();
boolean isLocal = (type == InvocationType.LOCAL || type == InvocationType.LOCALHOME);
if (isLocal)
throw new EJBException("Unable to get an instance from the pool", e);
else
throw new RemoteException("Unable to get an intance from the pool", e);
}
// Set the current security information
ctx.setPrincipal(mi.getPrincipal());
// Set the JACC EnterpriseBean PolicyContextHandler data
EnterpriseBeanPolicyContextHandler.setEnterpriseBean(ctx.getInstance());
// Use this context
mi.setEnterpriseContext(ctx);
// JAXRPC/JAXWS message context
Object msgContext = mi.getValue(InvocationKey.SOAP_MESSAGE_CONTEXT);
// Timer invocation
if (ejbTimeout.equals(mi.getMethod()))
{
AllowedOperationsAssociation.pushInMethodFlag(IN_EJB_TIMEOUT);
}
// Service Endpoint invocation
else if (msgContext != null)
{
if (msgContext instanceof javax.xml.rpc.handler.MessageContext)
ctx.setMessageContext((javax.xml.rpc.handler.MessageContext)msgContext);
AllowedOperationsAssociation.pushInMethodFlag(IN_SERVICE_ENDPOINT_METHOD);
}
// Business Method Invocation
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
{
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);
}
}
}
}