/*
* 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.io.OutputStream;
import java.io.ObjectOutputStream;
import java.io.IOException;
import java.rmi.Remote;
import java.rmi.server.RemoteObject;
import java.rmi.server.RemoteStub;
import java.security.PrivilegedAction;
import java.security.AccessController;
import javax.ejb.EJBObject;
import javax.ejb.EJBHome;
import javax.ejb.Handle;
import javax.ejb.SessionContext;
import javax.transaction.UserTransaction;
/**
* The SessionObjectOutputStream is used to serialize stateful session beans
* when they are passivated
*
* @see org.jboss.ejb.plugins.SessionObjectInputStream
* @author <a href="mailto:rickard.oberg@telkel.com">Rickard Oberg</a>
* @author <a href="mailto:sebastien.alborini@m4x.org">Sebastien Alborini</a>
* @version $Revision: 81030 $
*/
public class SessionObjectOutputStream
extends ObjectOutputStream
{
// Constructors -------------------------------------------------
public SessionObjectOutputStream(OutputStream out)
throws IOException
{
super(out);
EnableReplaceObjectAction.enableReplaceObject(this);
}
// ObjectOutputStream overrides ----------------------------------
protected Object replaceObject(Object obj)
throws IOException
{
Object replacement = obj;
// section 6.4.1 of the ejb1.1 specification states what must be taken care of
// ejb reference (remote interface) : store handle
if (obj instanceof EJBObject)
replacement = ((EJBObject)obj).getHandle();
// ejb reference (home interface) : store handle
else if (obj instanceof EJBHome)
replacement = ((EJBHome)obj).getHomeHandle();
// session context : store a typed dummy object
else if (obj instanceof SessionContext)
replacement = new StatefulSessionBeanField(StatefulSessionBeanField.SESSION_CONTEXT);
// naming context : the jnp implementation is serializable, do nothing
// user transaction : store a typed dummy object
else if (obj instanceof UserTransaction)
replacement = new StatefulSessionBeanField(StatefulSessionBeanField.USER_TRANSACTION);
else if( obj instanceof Handle )
replacement = new HandleWrapper((Handle)obj);
else if( (obj instanceof Remote) && !(obj instanceof RemoteStub) )
{
Remote remote = (Remote) obj;
try
{
replacement = RemoteObject.toStub(remote);
}
catch(IOException ignore)
{
// Let the Serialization layer try with original object
}
}
return replacement;
}
private static class EnableReplaceObjectAction implements PrivilegedAction
{
SessionObjectOutputStream os;
EnableReplaceObjectAction(SessionObjectOutputStream os)
{
this.os = os;
}
public Object run()
{
os.enableReplaceObject(true);
return null;
}
static void enableReplaceObject(SessionObjectOutputStream os)
{
EnableReplaceObjectAction action = new EnableReplaceObjectAction(os);
AccessController.doPrivileged(action);
}
}
}