1 /*
   2  * Copyright (c) 2005, 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 /*
  25  * @test
  26  * @bug 6233235 6268386
  27  * @summary Test allowsCoreThreadTimeOut
  28  * @author Martin Buchholz
  29  */
  30 
  31 import java.util.concurrent.*;
  32 
  33 public class CoreThreadTimeOut {
  34     static volatile int passed = 0, failed = 0;
  35     static void pass() { passed++; }
  36     static void fail() { failed++; Thread.dumpStack(); }
  37     static void unexpected(Throwable t) { failed++; t.printStackTrace(); }
  38     static void check(boolean cond) { if (cond) pass(); else fail(); }
  39     static void equal(Object x, Object y) {
  40         if (x == null ? y == null : x.equals(y)) pass();
  41         else {System.out.println(x + " not equal to " + y); fail(); }}
  42 
  43     static int countExecutorThreads() {











  44         Thread[] threads = new Thread[Thread.activeCount()+100];
  45         Thread.enumerate(threads);
  46         int count = 0;
  47         for (Thread t : threads)
  48             if (t != null && t.getName().matches("pool-[0-9]+-thread-[0-9]+"))


  49                 count++;
  50         return count;
  51     }
  52 
  53     public static void main(String[] args) throws Throwable {




  54         final int threadCount = 10;

  55         BlockingQueue<Runnable> q
  56             = new ArrayBlockingQueue<Runnable>(2*threadCount);
  57         ThreadPoolExecutor tpe
  58             = new ThreadPoolExecutor(threadCount, threadCount,
  59                                      30, TimeUnit.MILLISECONDS,
  60                                      q);
  61         equal(tpe.getCorePoolSize(), threadCount);
  62         check(! tpe.allowsCoreThreadTimeOut());
  63         tpe.allowCoreThreadTimeOut(true);
  64         check(tpe.allowsCoreThreadTimeOut());
  65         equal(countExecutorThreads(), 0);

  66         for (int i = 0; i < threadCount; i++)
  67             tpe.submit(new Runnable() { public void run() {}});
  68         equal(countExecutorThreads(), threadCount);
  69         Thread.sleep(500);



  70         equal(countExecutorThreads(), 0);
  71         tpe.shutdown();
  72         check(tpe.allowsCoreThreadTimeOut());

  73 
  74         System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
  75         if (failed > 0) throw new Exception("Some tests failed");
  76     }

















  77 }
--- EOF ---