Java example source code file (LocalRMIServerSocketFactoryTest.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

congratulations, exception, ioexception, jmx, localrmiserversocketfactory, localrmiserversocketfactorytest, neither, net, network, ouch, result, socket, success, synchronousqueue, this, thread, threading, threads, unexpected

The LocalRMIServerSocketFactoryTest.java Java example source code

/*
 * Copyright (c) 2008, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 *  @test LocalRMIServerSocketFactoryTest.java
 *  @bug 6774170
 *  @summary Connect to a server socket returned by the LocalRMIServerSocketFactory.
 *
 *  @author Daniel Fuchs
 *
 *  @run compile -XDignore.symbol.file=true -source 1.6 -g LocalRMIServerSocketFactoryTest.java
 *  @run main LocalRMIServerSocketFactoryTest
 */

import sun.management.jmxremote.LocalRMIServerSocketFactory;
import java.io.IOException;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.SynchronousQueue;

public class LocalRMIServerSocketFactoryTest {

    private static final SynchronousQueue<Exception> queue =
            new SynchronousQueue<Exception>();

    static final class Result extends Exception {

        private Result() {
            super("SUCCESS: No exception was thrown");
        }
        static final Result SUCCESS = new Result();
    }

    private static void checkError(String message) throws Exception {

        // Wait for the server to set the error field.
        final Exception x = queue.take();

        if (x == Result.SUCCESS) {
            return;
        }


        // case of 6674166: this is very unlikely to happen, even if
        //     both 6674166 and 6774170 aren't fixed. If it happens
        //     however, it might indicate that neither defects are fixed.

        if (x instanceof NullPointerException) {
            throw new Exception(message + " - " +
                    "Congratulations! it seems you have triggered 6674166. " +
                    "Neither 6674166 nor 6774170 seem to be fixed: " + x, x);
        } else if (x instanceof IOException) {
            throw new Exception(message + " - " +
                    "Unexpected IOException. Maybe you triggered 6674166? " +
                    x, x);
        } else if (x != null) {
            throw new Exception(message + " - " +
                    "Ouch, that's bad. " +
                    "This is a new kind of unexpected exception " +
                    x, x);
        }
    }

    public static void main(String[] args) throws Exception {
        final LocalRMIServerSocketFactory f =
                new LocalRMIServerSocketFactory();
        final ServerSocket s = f.createServerSocket(0);
        final int port = s.getLocalPort();
        Thread t = new Thread() {

            public void run() {
                while (true) {
                    Exception error = Result.SUCCESS;
                    try {
                        System.err.println("Accepting: ");
                        final Socket ss = s.accept();
                        System.err.println(ss.getInetAddress() + " accepted");
                    } catch (Exception x) {
                        x.printStackTrace();
                        error = x;
                    } finally {
                        try {
                            // wait for the client to get the exception.
                            queue.put(error);
                        } catch (Exception x) {
                            // too bad!
                            System.err.println("Could't send result to client!");
                            x.printStackTrace();
                            return;
                        }
                    }
                }
            }
        };
        t.setDaemon(true);
        t.start();

        System.err.println("new Socket((String)null, port)");
        final Socket s1 = new Socket((String) null, port);
        checkError("new Socket((String)null, port)");
        s1.close();
        System.err.println("new Socket((String)null, port): PASSED");

        System.err.println("new Socket(InetAddress.getByName(null), port)");
        final Socket s2 = new Socket(InetAddress.getByName(null), port);
        checkError("new Socket(InetAddress.getByName(null), port)");
        s2.close();
        System.err.println("new Socket(InetAddress.getByName(null), port): PASSED");

        System.err.println("new Socket(localhost, port)");
        final Socket s3 = new Socket("localhost", port);
        checkError("new Socket(localhost, port)");
        s3.close();
        System.err.println("new Socket(localhost, port): PASSED");

        System.err.println("new Socket(127.0.0.1, port)");
        final Socket s4 = new Socket("127.0.0.1", port);
        checkError("new Socket(127.0.0.1, port)");
        s4.close();
        System.err.println("new Socket(127.0.0.1, port): PASSED");

    }
}