/* 

 * Copyright 1999-2004 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 4120329

 * @summary RMI registry creation is impossible if first attempt fails.

 * @library ../../testlibrary

 * @build StreamPipe TestParams TestLibrary JavaVM 

 * @build RegistryRunner RegistryRunner_Stub

 * @build Reexport

 * @run main/othervm Reexport

 */

/* 

 * If a VM could not create an RMI registry because another registry

 * usually in another process, was using the registry port, the next

 * time the VM tried to create a registry (after the other registry

 * was brought down) the attempt would fail.  The second try to create

 * a registry would fail because the registry ObjID would still be in

 * use when it should never have been allocated.

 *

 * The test creates this conflict using Runtime.exec and ensures that

 * a registry can still be created after the conflict is resolved.  

 */

import java.io.*;

import java.rmi.*;

import java.rmi.registry.*;

import java.rmi.server.*;

public class Reexport {

    static public final int regport = TestLibrary.REGISTRY_PORT;

    static public void main(String[] argv) {

	Registry reg = null;

	try {

	    System.err.println("\nregression test for 4120329\n");

	    // establish the registry (we hope)

	    System.err.println("Starting registry on port " + regport);

	    Reexport.makeRegistry(regport);

	    // Get a handle to the registry

	    System.err.println("Creating duplicate registry, this should fail...");

	    reg = createReg(true);

	    if (reg != null) {

		TestLibrary.bomb("failed was able to duplicate the registry?!?");

	    }

	    // Kill the first registry.

	    System.err.println("Bringing down the first registry");

	    try {

		Reexport.killRegistry();

	    } catch (Exception foo) {

	    }

	    // start another registry now that the first is gone; this should work

	    System.err.println("Trying again to start our own " + 

			       "registry... this should work");

	    reg = createReg(false);

	    if (reg == null) {

		TestLibrary.bomb("Could not create registry on second try");

	    }

	    System.err.println("Test passed");

	} catch (Exception e) {

	    TestLibrary.bomb(e);

	} finally {

	    // dont leave the registry around to affect other tests.

	    killRegistry();

	    reg = null;

	}

    }

    static Registry createReg(boolean remoteOk) {

	Registry reg = null;

	try {

	    reg = LocateRegistry.createRegistry(regport);

	} catch (Throwable e) {

	    if (remoteOk) {

		System.err.println("EXPECTING PORT IN USE EXCEPTION:");

		System.err.println(e.getMessage());

		e.printStackTrace();

	    } else {

		TestLibrary.bomb((Exception) e);

	    }

	}

	return reg;

    }

    public static void makeRegistry(int p) {

	// sadly, we can't kill a registry if we have too-close control

	// over it.  We must make it in a subprocess, and then kill the

	// subprocess when it has served our needs.

	try {

	    JavaVM jvm = new JavaVM("RegistryRunner", "", Integer.toString(p));

	    jvm.start();

	    Reexport.subreg = jvm.getVM();

	} catch (IOException e) {

	    // one of these is summarily dropped, can't remember which one

	    System.out.println ("Test setup failed - cannot run rmiregistry");

	    TestLibrary.bomb("Test setup failed - cannot run test", e);

	}

	// Slop - wait for registry to come up.  This is stupid.

	try {

	    Thread.sleep (5000);

	} catch (Exception whatever) {

	}

    }

    private static Process subreg = null;

    public static void killRegistry() {

	if (Reexport.subreg != null) {

	    RegistryRunner.requestExit();

	    try {

		Reexport.subreg.waitFor();

	    } catch (InterruptedException ie) {

	    }

	}

	Reexport.subreg = null;

    }    

}