1 /*
   2  * Copyright (c) 2004, 2011, 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 import static java.lang.Thread.State.*;
  25 
  26 /*
  27  * @test
  28  * @bug     5014783 8022208
  29  * @summary Basic unit test of thread states returned by
  30  *          Thread.getState().
  31  *
  32  * @author  Mandy Chung
  33  * @build ThreadStateTest ThreadStateController
  34  * @run main ThreadStateTest
  35  */
  36 
  37 public class ThreadStateTest {
  38     private static boolean testFailed = false;
  39 
  40     // used to achieve waiting states
  41     private static final Object globalLock = new Object();
  42 
  43     public static void main(String[] argv) throws Exception {
  44         // Call Thread.getState to force all initialization done
  45         // before test verification begins.
  46         Thread.currentThread().getState();
  47         ThreadStateController thread = new ThreadStateController("StateChanger", globalLock);
  48         thread.setDaemon(true);
  49 
  50         // before myThread starts
  51         thread.checkThreadState(NEW);
  52 
  53         thread.start();
  54         thread.transitionTo(RUNNABLE);
  55         thread.checkThreadState(RUNNABLE);
  56 
  57         synchronized (globalLock) {
  58             thread.transitionTo(BLOCKED);
  59             thread.checkThreadState(BLOCKED);
  60         }
  61 
  62         thread.transitionTo(WAITING);
  63         thread.checkThreadState(WAITING);
  64 
  65         thread.transitionTo(TIMED_WAITING);
  66         thread.checkThreadState(TIMED_WAITING);
  67 
  68         thread.transitionToPark(true /* timed park*/);
  69         thread.checkThreadState(TIMED_WAITING);
  70 
  71         thread.transitionToPark(false /* indefinite park */);
  72         thread.checkThreadState(WAITING);
  73 
  74         thread.transitionToSleep();
  75         thread.checkThreadState(TIMED_WAITING);
  76 
  77         thread.transitionTo(TERMINATED);
  78         thread.checkThreadState(TERMINATED);
  79 
  80         try {
  81             thread.join();
  82         } catch (InterruptedException e) {
  83             e.printStackTrace();
  84             System.out.println("Unexpected exception.");
  85             testFailed = true;
  86         }
  87 
  88         if (testFailed)
  89             throw new RuntimeException("TEST FAILED.");
  90         System.out.println("Test passed.");
  91     }
  92 }