Glassfish example source code file (IIOPHandleDelegate.java)

This example Glassfish source code file (IIOPHandleDelegate.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

class, classloader, classnotfoundexception, classnotfoundexception, corba, ejb, error, handledelegate, handledelegate, iiop, ioexception, ioexception, naming, object, object, orb, rmi, serializable, servlet, web

The Glassfish IIOPHandleDelegate.java source code

/*
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 *
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 *
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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
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package org.glassfish.enterprise.iiop.impl;

import java.io.*;

import javax.ejb.*;
import javax.ejb.spi.HandleDelegate;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import javax.rmi.PortableRemoteObject;

import org.omg.CORBA.portable.Delegate;
import org.omg.CORBA.ORB;
import com.sun.corba.ee.spi.presentation.rmi.StubAdapter;

/**
 * An implementation of HandleDelegate for the IIOP Protocol.
 *
 */

public final class IIOPHandleDelegate
    implements HandleDelegate
{

    public static HandleDelegate getHandleDelegate() {
        HandleDelegate handleDelegate =
            (HandleDelegate) java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction() {
                    public Object run() {
                        try {
                            ClassLoader cl = new HandleDelegateClassLoader();
                            Class c = cl.loadClass(
                                "org.glassfish.enterprise.iiop.impl.IIOPHandleDelegate");
                            return c.newInstance();
                        } catch ( Exception ex ) {
                            throw new RuntimeException("Error creating HandleDelegate", ex);
                        }
                    }
                }
            );
        return handleDelegate;
    }
    
    
    public void writeEJBObject(javax.ejb.EJBObject ejbObject,
            java.io.ObjectOutputStream ostream)
        throws java.io.IOException
    {
        ostream.writeObject(ejbObject); // IIOP stubs are Serializable
    }
    
    public javax.ejb.EJBObject readEJBObject(java.io.ObjectInputStream istream)
        throws java.io.IOException, ClassNotFoundException
    {
        return (EJBObject)getStub(istream, EJBObject.class);
    }
    
    public void writeEJBHome(javax.ejb.EJBHome ejbHome,
            java.io.ObjectOutputStream ostream)
        throws java.io.IOException
    {
        ostream.writeObject(ejbHome); // IIOP stubs are Serializable
    }
    
    public javax.ejb.EJBHome readEJBHome(java.io.ObjectInputStream istream)
        throws java.io.IOException, ClassNotFoundException
    {
        return (EJBHome)getStub(istream, EJBHome.class);
    }
    
    private Object getStub(java.io.ObjectInputStream istream, Class stubClass)
        throws IOException, ClassNotFoundException
    {
        // deserialize obj
        Object obj = istream.readObject();

        if( StubAdapter.isStub(obj) ) {

            try {

                // Check if it is already connected to the ORB by getting
                // the delegate.  If BAD_OPERATION is not thrown, then the 
                // stub is connected.  This will happen if istream is an 
                // IIOP input stream.
                Delegate delegate = StubAdapter.getDelegate(obj);

            } catch(org.omg.CORBA.BAD_OPERATION bo) {

                // TODO Temporary way to get the ORB.  Will need to
                // replace with an approach that goes through the habitat
                ORB orb = null;
                try {

                    orb = (ORB) new InitialContext().lookup("java:comp/ORB");

                } catch(NamingException ne) {

                    throw new IOException("Error acquiring orb", ne);
                }

                // Stub is not connected. This can happen if istream is
		        // not an IIOP input stream (e.g. it's a File stream).
                StubAdapter.connect(obj, (com.sun.corba.ee.spi.orb.ORB) orb);
            }

        } else {
            throw new IOException("Unable to create stub for class " + 
                stubClass.getName() + 
                ", object deserialized is not a CORBA object, it's type is " +
                obj.getClass().getName());
        }

        // narrow it
        Object stub = PortableRemoteObject.narrow(obj, stubClass);
     
        return stub;
    }
    
}