1 /*
   2  * Copyright (c) 2001, 2010, 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 4467968
  26  * @summary Tests wether wakeup makes the next select() call return immediately
  27  */
  28 
  29 import java.io.IOException;
  30 import java.nio.channels.Selector;
  31 
  32 
  33 public class WakeupSpeed {
  34 
  35     public static void main(String argv[]) throws Exception {
  36         int waitTime = 4000;
  37         Selector selector = Selector.open();
  38         try {
  39             selector.wakeup();
  40 
  41             long t1 = System.currentTimeMillis();
  42             selector.select(waitTime);
  43             long t2 = System.currentTimeMillis();
  44             long totalTime = t2 - t1;
  45 
  46             if (totalTime > waitTime)
  47                 throw new RuntimeException("Test failed");
  48         } finally {
  49             selector.close();
  50         }
  51     }
  52 
  53 }