/*

 * Copyright (c) 2002, 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 4755720

 * @summary Test if OP_READ is detected with OP_WRITE in interestOps

 */

import java.net.*;

import java.nio.*;

import java.nio.channels.*;

import java.util.*;

public class OpRead {

    static void test() throws Exception {

        ServerSocketChannel ssc = null;

        SocketChannel sc = null;

        SocketChannel peer = null;

        try {

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

            // loopback connection

            InetAddress lh = InetAddress.getLocalHost();

            sc = SocketChannel.open(new InetSocketAddress(lh, ssc.socket().getLocalPort()));

            peer = ssc.accept();

            // peer sends message so that "sc" will be readable

            int n = peer.write(ByteBuffer.wrap("Hello".getBytes()));

            assert n > 0;

            sc.configureBlocking(false);

            Selector selector = Selector.open();

            SelectionKey key = sc.register(selector, SelectionKey.OP_READ |

                SelectionKey.OP_WRITE);

            boolean done = false;

            int failCount = 0;

            while (!done) {

                if (selector.select() > 0) {

                    Set<SelectionKey> keys = selector.selectedKeys();

                    Iterator<SelectionKey> iterator = keys.iterator();

                    while (iterator.hasNext()) {

                        key = iterator.next();

                        iterator.remove();

                        if (key.isWritable()) {

                            failCount++;

                            if (failCount > 10)

                                throw new RuntimeException("Test failed");

                            Thread.sleep(250);

                        }

                        if (key.isReadable()) {

                            done = true;

                        }

                    }

                }

            }

        } finally {

            if (peer != null) peer.close();

            if (sc != null) sc.close();

            if (ssc != null) ssc.close();

        }

    }

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

        test();

    }

}