Java example source code file (IsAvailable.java)

This example Java source code file (IsAvailable.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

http, httpclient, isavailable, method, net, network, reflection, runtimeexception, security, serversocket, url

The IsAvailable.java Java example source code

/*
 * Copyright (c) 2013, 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 8009650
 * @summary HttpClient available() check throws SocketException when connection
 * has been closed
 */

import java.net.URL;
import java.net.ServerSocket;
import sun.net.www.http.HttpClient;
import java.security.*;
import java.lang.reflect.Method;

public class IsAvailable {

    public static void main(String[] args) throws Exception {
        int readTimeout = 20;
        ServerSocket ss = new ServerSocket(0);

        URL url1 = new URL("http://localhost:" + ss.getLocalPort());
        HttpClient c1 = HttpClient.New(url1);

        Method available = HttpClient.class.
                getDeclaredMethod("available", null);
        available.setAccessible(true);

        c1.setReadTimeout(readTimeout);
        boolean a = (boolean) available.invoke(c1);
        if (!a) {
            throw new RuntimeException("connection should be available");
        }
        if (c1.getReadTimeout() != readTimeout) {
            throw new RuntimeException("read timeout has been altered");
        }

        c1.closeServer();

        a = (boolean) available.invoke(c1);
        if (a) {
            throw new RuntimeException("connection shouldn't be available");
        }

        ss.close();
    }
}