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 * 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.

 *

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 */

/* @test

 * @bug 4120329

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

 * @library ../../testlibrary

 * @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 void main(String[] argv) {

        Registry reg = null;

        int regPort = TestLibrary.getUnusedRandomPort();

        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, regPort);

            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(regPort);

            } 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, regPort);

            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(regPort);

            reg = null;

        }

    }

    static Registry createReg(boolean remoteOk, int port) {

        Registry reg = null;

        try {

            reg = LocateRegistry.createRegistry(port);

        } 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(int port) {

        if (Reexport.subreg != null) {

            RegistryRunner.requestExit(port);

            try {

                Reexport.subreg.waitFor();

            } catch (InterruptedException ie) {

            }

        }

        Reexport.subreg = null;

    }

}