/*

 * Copyright (c) 2004, 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 4729342

 * @summary Check for CancelledKeyException when key cancelled during select

 */

import java.nio.channels.*;

import java.io.IOException;

import java.net.*;

public class SelectAndCancel {

    static SelectionKey sk;

    /*

     * CancelledKeyException is the failure symptom of 4729342

     * NOTE: The failure is timing dependent and is not always

     * seen immediately when the bug is present.

     */

    public static void main(String[] args) throws Exception {

        final Selector selector = Selector.open();

        final ServerSocketChannel ssc =

            ServerSocketChannel.open().bind(new InetSocketAddress(0));

        final InetSocketAddress isa =

            new InetSocketAddress(InetAddress.getLocalHost(), ssc.socket().getLocalPort());

        // Create and start a selector in a separate thread.

        new Thread(new Runnable() {

                public void run() {

                    try {

                        ssc.configureBlocking(false);

                        sk = ssc.register(selector, SelectionKey.OP_ACCEPT);

                        selector.select();

                    } catch (IOException e) {

                        System.err.println("error in selecting thread");

                        e.printStackTrace();

                    }

                }

            }).start();

        // Wait for above thread to get to select() before we call close.

        Thread.sleep(3000);

        // Try to close. This should wakeup select.

        new Thread(new Runnable() {

                public void run() {

                    try {

                        SocketChannel sc = SocketChannel.open();

                        sc.connect(isa);

                        ssc.close();

                        sk.cancel();

                        sc.close();

                    } catch (IOException e) {

                        System.err.println("error in closing thread");

                        System.err.println(e);

                    }

                }

            }).start();

        // Wait for select() to be awakened, which should be done by close.

        Thread.sleep(3000);

        selector.wakeup();

        selector.close();

    }

}