/*
* 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.as.ejb3.iiop.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.CORBA.Stub;
import javax.rmi.PortableRemoteObject;
import org.jboss.util.NestedRuntimeException;
import org.omg.CORBA.BAD_OPERATION;
import org.omg.CORBA.ORB;
import org.omg.CORBA.portable.ObjectImpl;
import static org.jboss.as.ejb3.EjbMessages.MESSAGES;
/**
* <P>Implementation of the javax.ejb.spi.HandleDelegate interface</P>
* <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/>
* <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
*/
public class HandleDelegateImpl implements HandleDelegate {
public HandleDelegateImpl(final ClassLoader classLoader) {
proxy = SerializationHackProxy.proxy(classLoader);
}
private final SerializationHackProxy proxy;
public void writeEJBObject(final EJBObject ejbObject, final ObjectOutputStream oostream)
throws IOException {
oostream.writeObject(ejbObject);
}
public EJBObject readEJBObject(final ObjectInputStream oistream)
throws IOException, ClassNotFoundException {
final Object ejbObject = proxy.read(oistream);
reconnect(ejbObject);
return (EJBObject) PortableRemoteObject.narrow(ejbObject, EJBObject.class);
}
public void writeEJBHome(final EJBHome ejbHome, final ObjectOutputStream oostream)
throws IOException {
oostream.writeObject(ejbHome);
}
public EJBHome readEJBHome(final ObjectInputStream oistream)
throws IOException, ClassNotFoundException {
final Object ejbHome = proxy.read(oistream);
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
final Stub stub = (Stub) object;
final ORB orb = (ORB) new InitialContext().lookup("java:comp/ORB");
stub.connect(orb);
} catch (NamingException ne) {
throw MESSAGES.failedToLookupORB();
}
}
} else {
throw MESSAGES.notAnObjectImpl(object.getClass());
}
}
public static HandleDelegate getDelegate() {
try {
final InitialContext ctx = new InitialContext();
return (HandleDelegate) ctx.lookup("java:comp/HandleDelegate");
} catch (NamingException e) {
throw new NestedRuntimeException(e);
}
}
}