/*

 * Copyright (c) 2003, 2010, 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 4854354

 * @summary Test vector write faster than can be read

 * @library ..

 */

import java.io.*;

import java.net.*;

import java.nio.*;

import java.nio.channels.*;

import java.util.*;

public class Write {

    static Random generator = new Random();

    static int testSize = 15;

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

        WriteServer sv = new WriteServer();

        sv.start();

        bufferTest(sv.port());

        if (sv.finish(8000) == 0)

            throw new Exception("Failed" );

    }

    static void bufferTest(int port) throws Exception {

        ByteBuffer[] bufs = new ByteBuffer[testSize];

        for(int i=0; i<testSize; i++) {

            String source =

                "a muchmuchmuchmuchmuchmuchmuchmuch larger buffer numbered " +

                i;

            bufs[i] = ByteBuffer.allocateDirect(source.length());

        }

        // Get a connection to the server

        InetAddress lh = InetAddress.getLocalHost();

        InetSocketAddress isa = new InetSocketAddress(lh, port);

        SocketChannel sc = SocketChannel.open();

        sc.connect(isa);

        sc.configureBlocking(false);

        // Try to overflow the socket buffer

        long total = 0;

        for (int i=0; i<100; i++) {

            long bytesWritten = sc.write(bufs);

            if (bytesWritten > 0)

                total += bytesWritten;

            for(int j=0; j<testSize; j++)

                bufs[j].rewind();

        }

        // Clean up

        sc.close();

    }

}

class WriteServer extends TestThread {

    static Random generator = new Random();

    final ServerSocketChannel ssc;

    WriteServer() throws IOException {

        super("WriteServer");

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

    }

    int port() {

        return ssc.socket().getLocalPort();

    }

    void go() throws Exception {

        bufferTest();

    }

    void bufferTest() throws Exception {

        ByteBuffer buf = ByteBuffer.allocateDirect(5);

        // Get a connection from client

        SocketChannel sc = null;

        try {

            ssc.configureBlocking(false);

            for (;;) {

                sc = ssc.accept();

                if (sc != null)

                    break;

                Thread.sleep(50);

            }

            // I'm a slow reader...

            Thread.sleep(3000);

        } finally {

            // Clean up

            ssc.close();

            if (sc != null)

                sc.close();

        }

    }

}