/*

 * Copyright (c) 2001, 2019, 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.

 */

/*

 * Tests that a thread blocked in ServerSocket.accept

 * throws a SocketException if the socket is asynchronously closed.

 */

import java.io.IOException;

import java.net.InetAddress;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.SocketException;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.atomic.AtomicBoolean;

public class ServerSocket_accept extends AsyncCloseTest implements Runnable {

    private final ServerSocket ss;

    private final int timeout;

    private final CountDownLatch latch;

    private final AtomicBoolean readyToClose = new AtomicBoolean(false);

    public ServerSocket_accept() throws IOException {

       this(0);

    }

    public ServerSocket_accept(int timeout) throws IOException {

        this.timeout = timeout;

        latch = new CountDownLatch(1);

        ss = new ServerSocket(0, 0, InetAddress.getLoopbackAddress());

    }

    public String description() {

        String s = "ServerSocket.accept()";

        if (timeout > 0) {

            s += " (with timeout)";

        }

        return s;

    }

    public void run() {

        try {

            latch.countDown();

            Socket s;

            // if readyToClose is still false it means some other

            // process on the system attempted to connect: just

            // ignore it, and go back to accept again.

            do {

                s = ss.accept();

            } while (!readyToClose.get());

            failed("ServerSocket.accept() returned unexpectedly!!" + " - " + s);

        } catch (SocketException se) {

            closed();

        } catch (Exception e) {

            failed(e.getMessage());

        }

    }

    public AsyncCloseTest go(){

        try {

            Thread thr = new Thread(this);

            thr.start();

            latch.await();

            Thread.sleep(5000); //sleep, so ServerSocket.accept() can block

            readyToClose.set(true);

            ss.close();

            thr.join();

            if (isClosed()) {

                return passed();

            } else {

                return failed("ServerSocket.accept() wasn't preempted");

            }

        } catch (Exception x) {

            failed(x.getMessage());

            throw new RuntimeException(x);

        }

    }

}