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Java example source code file (CloseFailedClientTest.java)

This example Java source code file (CloseFailedClientTest.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

closefailedclienttest, exception, ioeeption, ioexception, jmxconnectorserver, jmxserviceurl, malformedurlexception, management, net, network, runtimeexception, string

The CloseFailedClientTest.java Java example source code

/*
 * Copyright (c) 2003, 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
 * @bug 4921888
 * @summary Tests that we do not get a NullPointException.
 * @author Shanliang JIANG
 * @run clean CloseFailedClientTest
 * @run build CloseFailedClientTest
 * @run main CloseFailedClientTest
 */

import java.net.MalformedURLException;
import java.io.IOException;

import javax.management.*;
import javax.management.remote.*;

/**
 * Try to connect a client to a no-existing or not started server,
 * expected to receive an IOException.
 *
 */
public class CloseFailedClientTest {
    /**
     * we use a fix port on which we hope no server is running,
     * or a server running on it will give an IOException when our
     * clients try to connect to it.
     * The port 999 is specified in
     * http://www.iana.org/assignments/port-numbers
     * as:
     * garcon           999/tcp
     * applix           999/udp        Applix ac
     * puprouter        999/tcp
     * puprouter        999/udp
     *
     * If the test fails because a server runs on this port and does
     * not give back an IOException, we can change to another one like
     * 9999
     */
    private static final int port = 999;

    private static final String[] protocols = {"rmi", "iiop", "jmxmp"};

    public static void main(String[] args) throws Exception {
        System.out.println("Test to close a failed client.");

        boolean ok = true;
        for (int i = 0; i < protocols.length; i++) {
            try {
                if (!test(protocols[i])) {
                    System.out.println("Test failed for " + protocols[i]);
                    ok = false;
                } else {
                    System.out.println("Test successed for " + protocols[i]);
                }
            } catch (Exception e) {
                System.out.println("Test failed for " + protocols[i]);
                e.printStackTrace(System.out);
                ok = false;
            }
        }

        if (ok) {
            System.out.println("Test passed");
            return;
        } else {
            System.out.println("TEST FAILED");
            System.exit(1);
        }
    }


    private static boolean test(String proto)
            throws Exception {
        System.out.println("Test for protocol " + proto);
        JMXServiceURL url = new JMXServiceURL(proto, null, port);

        JMXConnector connector;
        JMXConnectorServer server;

        for (int i=0; i<20; i++) {
            // no server
            try {
                connector = JMXConnectorFactory.newJMXConnector(url, null);
            } catch (MalformedURLException e) {
                System.out.println("Skipping unsupported URL " + url);
                return true;
            }

            try {
                connector.connect();

                throw new RuntimeException("Do not get expected IOEeption.");
            } catch (IOException e) {
                // OK, the expected IOException is thrown.");
            }

            // close the connector client
            connector.close();

            // with server but not started
            try {
                server = JMXConnectorServerFactory.newJMXConnectorServer(url, null, null);
            } catch (MalformedURLException e) {
                System.out.println("Skipping unsupported URL " + url);
                return true;
            }

            connector = JMXConnectorFactory.newJMXConnector(url, null);

            try {
                connector.connect();

                throw new RuntimeException("Do not get expected IOEeption.");
            } catch (IOException e) {
                // OK, the expected IOException is thrown.");
            }

            // close the connector client
            connector.close();
        }

        return true;
    }
}

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