1 /*
   2  * Copyright (c) 2002, 2018, 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 8195160
  26  * @summary Test RdmaSocket with OP_WRITE would get selected only once
  27  * @requires (os.family == "linux")
  28  * @library .. /test/lib
  29  * @build RsocketTest
  30  * @run main/othervm -Djava.net.preferIPv4Stack=true SelectWrite
  31  */
  32 
  33 import java.nio.channels.Selector;
  34 import java.nio.channels.SelectionKey;
  35 import java.nio.channels.SocketChannel;
  36 import jdk.net.Sockets;
  37 
  38 public class SelectWrite implements Runnable {
  39 
  40     static SocketChannel sc;
  41     static ByteServer server;
  42 
  43     public static void main(String[] argv) throws Exception {
  44         if (!RsocketTest.isRsocketAvailable())
  45             return;
  46 
  47         try {
  48             server = new ByteServer();
  49             sc = Sockets.openRdmaSocketChannel();
  50 
  51             Thread t = new Thread(new SelectWrite());
  52             t.start();
  53 
  54             server.acceptConnection();
  55 
  56             try (Selector sel = Sockets.openRdmaSelector()) {
  57                 sc.configureBlocking(false);
  58                 sc.register(sel, SelectionKey.OP_WRITE);
  59                 sel.select();
  60                 sel.selectedKeys().clear();
  61                 if (sel.select() == 0) {
  62                     throw new Exception("Select returned zero");
  63                 }
  64             }
  65         } catch (Exception e) {
  66             e.printStackTrace();
  67             throw new RuntimeException("Test Failed!");
  68         }
  69     }
  70 
  71     public void run() {
  72         try {
  73             sc.connect(server.address());
  74         } catch (Exception e) {
  75             e.printStackTrace();
  76             throw new RuntimeException("Test Failed!");
  77         }
  78     }
  79 }