/* 
 * Copyright 1998 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.
 */

/**
 *
 *
 * Client that will run in its own vm and tell the main CheckFQDN test
 * program what its rmi host name is, name obtained from TCPEndpoint.  
 */

import java.rmi.*;
import java.rmi.server.*;
import sun.rmi.transport.tcp.TCPEndpoint;

/**
 * Get the local endpoint: make sure that this process does
 * not take too much time and that the resulting localhost
 * string is correct for the property set on an execed vm process.
 */
public class CheckFQDNClient implements Runnable {

    final static int NAME_SERVICE_TIME_OUT = 12000;
    
    static TCPEndpoint ep = null;

    /** 
     * main, lookup remote object and tell it the rmi
     * hostname of this client vm.
     */
    public static void main (String args[]) {
	
	// start a registry and register a copy of this in it.
	TellServerName tell;
	String hostname = null;
	
	try {
	    hostname = retrieveServerName();
	    System.err.println("Client host name: " +
			       hostname);

	    tell = (TellServerName) Naming.lookup("rmi://:" + 
						  TestLibrary.REGISTRY_PORT
						  + "/CheckFQDN");
	    tell.tellServerName(hostname);
	    System.err.println("client has exited");

	} catch (Exception e ) {
	    throw new RuntimeException(e.getMessage());
	}
	System.exit(0);
    }
    
    /* what is the rmi hostname for this vm? */
    public static String retrieveServerName () {
	try {

	    CheckFQDNClient chk = new CheckFQDNClient();
	    
	    synchronized(chk) {
		(new Thread (chk)).start();
		chk.wait(NAME_SERVICE_TIME_OUT);
	    }
	    
	    if (ep == null) {
		throw new RuntimeException 
		    ("Timeout getting the local endpoint.");
	    }
	    
	    // this is the name used by rmi for the client hostname
	    return ep.getHost();
	    
	}catch (Exception e){
	    throw new RuntimeException (e.getMessage());
	}
    }

    /* thread to geth the rmi hostname of this vm */
    public void run () {
	try {
	    synchronized(this) {
		ep = TCPEndpoint.getLocalEndpoint(0);
	    }
	} catch (Exception e) {
	    throw new RuntimeException();
	} finally {
	    synchronized(this) {
		this.notify();
	    }
	}
    }
}