/*

 * 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 Test SocketChannel.finishConnect

 */

import java.net.*;

import java.nio.*;

import java.nio.channels.*;

import java.nio.channels.spi.SelectorProvider;

import java.nio.charset.*;

import java.util.*;

public class FinishConnect {

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

        try (TestServers.DayTimeServer dayTimeServer

                = TestServers.DayTimeServer.startNewServer(100)) {

            test1(dayTimeServer, true, true);

            test1(dayTimeServer, true, false);

            test1(dayTimeServer, false, true);

            test1(dayTimeServer, false, false);

            test2(dayTimeServer);

        }

    }

    static void test1(TestServers.DayTimeServer daytimeServer,

                      boolean select,

                      boolean setBlocking)

        throws Exception

    {

        InetSocketAddress isa

            = new InetSocketAddress(daytimeServer.getAddress(),

                                    daytimeServer.getPort());

        SocketChannel sc = SocketChannel.open();

        sc.configureBlocking(false);

        boolean connected = sc.connect(isa);

        int attempts = 0;

        try {

            sc.connect(isa);

            throw new RuntimeException("Allowed another connect call");

        } catch (IllegalStateException ise) {

            // Correct behavior

        }

        if (setBlocking)

            sc.configureBlocking(true);

        if (!connected && select && !setBlocking) {

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

            sc.register(selector, SelectionKey.OP_CONNECT);

            while (!connected) {

                int keysAdded = selector.select(100);

                if (keysAdded > 0) {

                    Set readyKeys = selector.selectedKeys();

                    Iterator i = readyKeys.iterator();

                    while (i.hasNext()) {

                        SelectionKey sk = (SelectionKey)i.next();

                        SocketChannel nextReady =

                            (SocketChannel)sk.channel();

                        connected = sc.finishConnect();

                    }

                }

            }

            selector.close();

        }

        while (!connected) {

            if (attempts++ > 30)

                throw new RuntimeException("Failed to connect");

            Thread.sleep(100);

            connected = sc.finishConnect();

        }

        ByteBuffer bb = ByteBuffer.allocateDirect(100);

        int bytesRead = 0;

        int totalRead = 0;

        while (totalRead < 20) {

            bytesRead = sc.read(bb);

            if (bytesRead > 0)

                totalRead += bytesRead;

            if (bytesRead < 0)

                throw new RuntimeException("Message shorter than expected");

        }

        bb.position(bb.position() - 2);         // Drop CRLF

        bb.flip();

        CharBuffer cb = Charset.forName("US-ASCII").newDecoder().decode(bb);

        System.err.println(isa + " says: \"" + cb + "\"");

        sc.close();

    }

    static void test2(TestServers.DayTimeServer daytimeServer) throws Exception {

        InetSocketAddress isa

            = new InetSocketAddress(daytimeServer.getAddress(),

                                    daytimeServer.getPort());

        boolean done = false;

        int globalAttempts = 0;

        int connectSuccess = 0;

        while (!done) {

            // When using a local daytime server it is not always possible

            // to get a pending connection, as sc.connect(isa) may always

            // return true.

            // So we're going to throw the exception only if there was

            // at least 1 case where we did not manage to connect.

            if (globalAttempts++ > 50) {

                if (globalAttempts == connectSuccess + 1) {

                    System.out.println("Can't fully test on "

                            + System.getProperty("os.name"));

                    break;

                }

                throw new RuntimeException("Failed to connect");

            }

            SocketChannel sc = SocketChannel.open();

            sc.configureBlocking(false);

            boolean connected = sc.connect(isa);

            int localAttempts = 0;

            while (!connected) {

                if (localAttempts++ > 500)

                    throw new RuntimeException("Failed to connect");

                connected = sc.finishConnect();

                if (connected) {

                    done = true;

                    break;

                }

                Thread.sleep(10);

            }

            if (connected) {

                connectSuccess++;

            }

            sc.close();

        }

    }

}