/*
* 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.EntityContainer;
import org.jboss.ejb.EntityPersistenceManager;
import org.jboss.ejb.EntityEnterpriseContext;
import org.jboss.ejb.InstancePool;
import org.jboss.ejb.AllowedOperationsAssociation;
import org.jboss.invocation.Invocation;
import org.jboss.invocation.InvocationType;
import javax.ejb.EJBException;
import javax.ejb.TimedObject;
import javax.ejb.Timer;
import java.lang.reflect.Method;
import java.rmi.RemoteException;
/**
* @deprecated this interceptor was used with Instance Per Transaction containers which do not use a global cache
* but cache instances per transaction and always passivate instances at commit time (commit option C).
* This interceptor used org.jboss.ejb.TxEntityMap to compensate the absence of a real per transaction cache implementation.
* Now, the differences between IPT and standard container are:
* <ul>
* <li>org.jboss.ejb.plugins.PerTxEntityInstanceCache as the cache implementation;</li>
* <li>NoLock as the locking policy;</li>
* <li>empty container-cache-conf element.</li>
* </ul>
* (alex@jboss.org)
*
* The instance interceptors role is to acquire a context representing
* the target object from the cache.
*
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 81030 $
*/
public class EntityMultiInstanceInterceptor
extends AbstractInterceptor
{
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
// 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 --------------------------------------------------------
// Interceptor implementation --------------------------------------
public Object invokeHome(Invocation mi)
throws Exception
{
// Get context
EntityContainer ec = (EntityContainer) getContainer();
EntityEnterpriseContext ctx = (EntityEnterpriseContext) ec.getInstancePool().get();
// Pass it to the method invocation
mi.setEnterpriseContext(ctx);
// Give it the transaction
ctx.setTransaction(mi.getTransaction());
// Set the current security information
ctx.setPrincipal(mi.getPrincipal());
AllowedOperationsAssociation.pushInMethodFlag(IN_EJB_HOME);
Object result;
try
{
// Invoke through interceptors
result = getNext().invokeHome(mi);
}
finally
{
AllowedOperationsAssociation.popInMethodFlag();
}
// No id, means we can put the context back in the pool
if (ctx.getId() == null)
{
ctx.setTransaction(null);
ec.getInstancePool().free(ctx);
}
// We are done
return result;
}
public Object invoke(Invocation mi)
throws Exception
{
// The key
Object key = mi.getId();
EntityEnterpriseContext ctx = null;
EntityContainer ec = (EntityContainer) container;
if (mi.getTransaction() != null)
{
//ctx = ec.getTxEntityMap().getCtx(mi.getTransaction(), key);
}
if (ctx == null)
{
InstancePool pool = ec.getInstancePool();
try
{
ctx = (EntityEnterpriseContext) 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);
}
ctx.setCacheKey(key);
ctx.setId(key);
EntityPersistenceManager pm = ec.getPersistenceManager();
pm.activateEntity(ctx);
}
boolean trace = log.isTraceEnabled();
if( trace ) log.trace("Begin invoke, key="+key);
// Associate transaction, in the new design the lock already has the transaction from the
// previous interceptor
ctx.setTransaction(mi.getTransaction());
// Set the current security information
ctx.setPrincipal(mi.getPrincipal());
// Set the JACC EnterpriseBean PolicyContextHandler data
EnterpriseBeanPolicyContextHandler.setEnterpriseBean(ctx.getInstance());
// Set context on the method invocation
mi.setEnterpriseContext(ctx);
if (ejbTimeout.equals(mi.getMethod()))
AllowedOperationsAssociation.pushInMethodFlag(IN_EJB_TIMEOUT);
else
AllowedOperationsAssociation.pushInMethodFlag(IN_BUSINESS_METHOD);
try
{
Object ret = getNext().invoke(mi);
return ret;
}
finally
{
AllowedOperationsAssociation.popInMethodFlag();
EnterpriseBeanPolicyContextHandler.setEnterpriseBean(null);
}
}
}
|