1 /*

     2  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /* @test

    25  * @bug 4513011

    26  * @summary Registering and cancelling same fd many times

    27  * @library ..

    28  */

    29 

    30 import java.net.*;

    31 import java.nio.*;

    32 import java.nio.channels.*;

    33 import java.nio.channels.spi.SelectorProvider;

    34 import java.util.*;

    35 

    36 public class Alias {

    37 

    38     static int success = 0;

    39     static int LIMIT = 20; // Hangs after just 1 if problem is present

    40 

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

    42         try (TestServers.DayTimeServer daytimeServer

    43                 = TestServers.DayTimeServer.startNewServer(100)) {

    44             test1(daytimeServer);

    45         }

    46     }

    47 

    48     static void test1(TestServers.DayTimeServer daytimeServer) throws Exception {

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

    50         InetAddress myAddress = daytimeServer.getAddress();

    51         InetSocketAddress isa

    52             = new InetSocketAddress(myAddress,

    53                                     daytimeServer.getPort());

    54 

    55         for (int j=0; j<LIMIT; j++) {

    56             SocketChannel sc = SocketChannel.open();

    57             sc.configureBlocking(false);

    58             boolean result = sc.connect(isa);

    59 

    60             // On some platforms - given that we're using a local server,

    61             // we may not enter into the if () { } statement below...

    62             if (!result) {

    63                 SelectionKey key = sc.register(selector,

    64                                                SelectionKey.OP_CONNECT);

    65                 while (!result) {

    66                     int keysAdded = selector.select(100);

    67                     if (keysAdded > 0) {

    68                         Set readyKeys = selector.selectedKeys();

    69                         Iterator i = readyKeys.iterator();

    70                         while (i.hasNext()) {

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

    72                             SocketChannel nextReady =

    73                                 (SocketChannel)sk.channel();

    74                             result = nextReady.finishConnect();

    75                         }

    76                     }

    77                 }

    78                 key.cancel();

    79             }

    80             read(sc);

    81         }

    82         selector.close();

    83     }

    84 

    85     static void read(SocketChannel sc) throws Exception {

    86         ByteBuffer bb = ByteBuffer.allocateDirect(100);

    87         int n = 0;

    88         while (n == 0) // Note this is not a rigorous check for done reading

    89             n = sc.read(bb);

    90         //bb.position(bb.position() - 2);

    91         //bb.flip();

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

    93         //System.out.println("Received: \"" + cb + "\"");

    94         sc.close();

    95         success++;

    96     }

    97 }