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 (TestUtil.DayTimeServer daytimeServer =
  43                         TestUtil.DayTimeServer.startNewServer(100)) {
  44             test1(daytimeServer);
  45         }
  46     }
  47 
  48     static void test1(TestUtil.DayTimeServer daytimeServer)
  49             throws Exception {
  50         Selector selector = SelectorProvider.provider().openSelector();
  51         InetAddress myAddress = daytimeServer.getAddress();
  52         InetSocketAddress isa = new InetSocketAddress(myAddress, daytimeServer.getPort());
  53 
  54         for (int j=0; j<LIMIT; j++) {
  55             SocketChannel sc = SocketChannel.open();
  56             sc.configureBlocking(false);
  57             boolean result = sc.connect(isa);
  58 
  59             // On solaris - given that we're using a local server,
  60             // we probably no longer enter into the if () { 
  61             // 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             } else {
  80                 System.err.println("Can't fully test on "
  81                         + System.getProperty("os.name"));
  82             }
  83             read(sc);
  84         }
  85         selector.close();
  86     }
  87 
  88     static void read(SocketChannel sc) throws Exception {
  89         ByteBuffer bb = ByteBuffer.allocateDirect(100);
  90         int n = 0;
  91         while (n == 0) // Note this is not a rigorous check for done reading
  92             n = sc.read(bb);
  93         //bb.position(bb.position() - 2);
  94         //bb.flip();
  95         //CharBuffer cb = Charset.forName("US-ASCII").newDecoder().decode(bb);
  96         //System.out.println("Received: \"" + cb + "\"");
  97         sc.close();
  98         success++;
  99     }
 100 }