/*

 * Copyright (c) 2002, 2018, 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.

 *

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 */

/* @test

 * @bug 4530007

 * @summary Test if keys reported ready multiple times

 * @library .. /test/lib

 * @build jdk.test.lib.Utils TestServers

 * @run main KeysReady

 */

import java.net.*;

import java.nio.channels.*;

import java.nio.channels.spi.SelectorProvider;

public class KeysReady {

    static void test(TestServers.DayTimeServer dayTimeServer) throws Exception {

        InetSocketAddress isa

            = new InetSocketAddress(dayTimeServer.getAddress(),

                                    dayTimeServer.getPort());

        SocketChannel sc = SocketChannel.open();

        sc.configureBlocking(false);

        sc.connect(isa);

        // Prepare a selector

        Selector selector = SelectorProvider.provider().openSelector();

        try {

            SelectionKey key = sc.register(selector, SelectionKey.OP_CONNECT);

            int keysAdded = selector.select();

            if (keysAdded > 0) {

                keysAdded = selector.select(1000);

                if (keysAdded > 0)

                    throw new Exception("Same key reported added twice");

            }

        } finally {

            selector.close();

            sc.close();

        }

    }

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

        try (TestServers.DayTimeServer daytimeServer

                = TestServers.DayTimeServer.startNewServer(50)) {

            test(daytimeServer);

        }

    }

}