jdk/test/java/rmi/server/UnicastRemoteObject/changeHostName/ChangeHostName.java

/* 
 * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/* @test
 * @bug 4180282
 * @summary RMI needs a mechanism to dynamically change a VMs RMI
 * serverHostname.  If the java.rmi.server.hostname property is
 * changed dynamically, newly exported objects should be exported
 * with the new hostname instead of the value of the
 * java.rmi.server.hostname property when the first object was exported.
 *
 * @author Ann Wollrath
 *
 * @build ChangeHostName
 * @build ChangeHostName_Stub
 * @run main/othervm ChangeHostName
 */

import java.net.InetAddress;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.server.RemoteObject;
import java.rmi.server.UnicastRemoteObject;

public class ChangeHostName
    extends UnicastRemoteObject
    implements Receiver
{
    public ChangeHostName() throws RemoteException {
    }

    public void receive(Remote obj) {
	System.err.println("received: " + obj.toString());
    }

    public static void main(String[] args) throws Exception {

	InetAddress localAddress = InetAddress.getLocalHost();
	String[] hostlist = new String[] {
	    localAddress.getHostAddress(), localAddress.getHostName() };

	for (int i = 0; i < hostlist.length; i++) {
		
	    System.setProperty("java.rmi.server.hostname", hostlist[i]);
	    Remote impl = new ChangeHostName();
	    System.err.println("\ncreated impl extending URO: " + impl);
		
	    Receiver stub = (Receiver) RemoteObject.toStub(impl);
	    System.err.println("stub for impl: " + stub);

	    System.err.println("invoking method on stub");
	    stub.receive(stub);

	    UnicastRemoteObject.unexportObject(impl, true);
	    System.err.println("unexported impl");

	    if (stub.toString().indexOf(hostlist[i]) >= 0) {
		System.err.println("stub's ref contains hostname: " +
				   hostlist[i]);
	    } else {
		throw new RuntimeException(
		    "TEST FAILED: stub's ref doesn't contain hostname: " +
		    hostlist[i]);
	    }
	}
	System.err.println("TEST PASSED");
    }
}

interface Receiver extends Remote {
    void receive(Remote obj) throws RemoteException;
}