/*
* 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.proxy.ejb.handle;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import javax.ejb.EJBHome;
import javax.ejb.EJBObject;
import javax.ejb.spi.HandleDelegate;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import javax.rmi.CORBA.Stub;
import org.jboss.util.NestedRuntimeException;
import org.omg.CORBA.BAD_OPERATION;
import org.omg.CORBA.ORB;
import org.omg.CORBA.portable.Delegate;
import org.omg.CORBA.portable.ObjectImpl;
/**
* <P>Implementation of the javax.ejb.spi.HandleDelegate interface</P>
*
* <P>The HandleDelegate interface is implemented by the EJB container.
* It is used by portable implementations of javax.ejb.Handle and
* javax.ejb.HomeHandle. It is not used by EJB components or by client components.
* It provides methods to serialize and deserialize EJBObject and EJBHome
* references to streams.</P>
*
* <P>The HandleDelegate object is obtained by JNDI lookup at the reserved name
* "java:comp/HandleDelegate".</P>
*
* @author Dimitris.Andreadis@jboss.org
* @author adrian@jboss.com
* @version $Revision: 81030 $
*/
public class HandleDelegateImpl
implements HandleDelegate
{
public static HandleDelegate getDelegate()
{
try
{
InitialContext ctx = new InitialContext();
return (HandleDelegate) ctx.lookup("java:comp/HandleDelegate");
}
catch (NamingException e)
{
throw new NestedRuntimeException(e);
}
}
// HandleDelegate implementation ---------------------------------
public void writeEJBObject(EJBObject ejbObject, ObjectOutputStream oostream)
throws IOException
{
oostream.writeObject(ejbObject);
}
public EJBObject readEJBObject(ObjectInputStream oistream)
throws IOException, ClassNotFoundException
{
Object ejbObject = oistream.readObject();
reconnect(ejbObject);
return (EJBObject) PortableRemoteObject.narrow(ejbObject, EJBObject.class);
}
public void writeEJBHome(EJBHome ejbHome, ObjectOutputStream oostream)
throws IOException
{
oostream.writeObject(ejbHome);
}
public EJBHome readEJBHome(ObjectInputStream oistream)
throws IOException, ClassNotFoundException
{
Object ejbHome = oistream.readObject();
reconnect(ejbHome);
return (EJBHome) PortableRemoteObject.narrow(ejbHome, EJBHome.class);
}
protected void reconnect(Object object) throws IOException
{
if (object instanceof ObjectImpl)
{
try
{
// Check we are still connected
ObjectImpl objectImpl = (ObjectImpl) object;
objectImpl._get_delegate();
}
catch (BAD_OPERATION e)
{
try
{
// Reconnect
Stub stub = (Stub) object;
ORB orb = (ORB) new InitialContext().lookup("java:comp/ORB");
stub.connect(orb);
}
catch (NamingException ne)
{
throw new IOException("Unable to lookup java:comp/ORB");
}
}
}
else
throw new IOException("Not an ObjectImpl " + object.getClass().getName());
}
}