/*

 * 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

 * @summary Unit test for server-socket channels

 * @library ..

 */

import java.io.*;

import java.net.*;

import java.nio.*;

import java.nio.channels.*;

public class Basic {

    static PrintStream log = System.err;

    static class Server

        extends TestThread

    {

        ServerSocketChannel ssc;

        boolean block;

        Server(ServerSocketChannel ssc, boolean block) {

            super("Server", Basic.log);

            this.ssc = ssc;

            this.block = block;

        }

        void go() throws Exception {

            log.println("Server: Listening "

                        + (block ? "(blocking)" : "(non-blocking)"));

            if (!block)

                ssc.configureBlocking(false);

            log.println("  " + ssc);

            //log.println("  " + ssc.options());

            SocketChannel sc = null;

            for (;;) {

                sc = ssc.accept();

                if (sc != null) {

                    break;

                }

                log.println("Server: Sleeping...");

                Thread.sleep(50);

            }

            log.println("Server: Accepted " + sc);

            ByteBuffer bb = ByteBuffer.allocateDirect(100);

            if (sc.read(bb) != 1)

                throw new Exception("Read failed");

            bb.flip();

            byte b = bb.get();

            log.println("Server: Read " + b + ", writing " + (b + 1));

            bb.clear();

            bb.put((byte)43);

            bb.flip();

            if (sc.write(bb) != 1)

                throw new Exception("Write failed");

            sc.close();

            ssc.close();

            log.println("Server: Finished");

        }

    }

    static class Client

        extends TestThread

    {

        int port;

        boolean dally;

        Client(int port, boolean block) {

            super("Client", Basic.log);

            this.port = port;

            this.dally = !block;

        }

        public void go() throws Exception {

            if (dally)

                Thread.sleep(200);

            InetSocketAddress isa

                = new InetSocketAddress(InetAddress.getLocalHost(), port);

            log.println("Client: Connecting to " + isa);

            SocketChannel sc = SocketChannel.open();

            sc.connect(isa);

            log.println("Client: Connected");

            ByteBuffer bb = ByteBuffer.allocateDirect(512);

            bb.put((byte)42).flip();

            log.println("Client: Writing " + bb.get(0));

            if (sc.write(bb) != 1)

                throw new Exception("Write failed");

            bb.clear();

            if (sc.read(bb) != 1)

                throw new Exception("Read failed");

            bb.flip();

            if (bb.get() != 43)

                throw new Exception("Read " + bb.get(bb.position() - 1));

            log.println("Client: Read " + bb.get(0));

            sc.close();

            log.println("Client: Finished");

        }

    }

    static void test(boolean block) throws Exception {

        ServerSocketChannel ssc = ServerSocketChannel.open();

        ssc.socket().setReuseAddress(true);

        int port = TestUtil.bind(ssc);

        Server server = new Server(ssc, block);

        Client client = new Client(port, block);

        server.start();

        client.start();

            throw new Exception("Failure");

        log.println();

    }

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

        log.println();

        test(true);

        test(false);

    }

}