| /* |
| * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4992438 |
| * @compile -source 1.5 Fairness.java |
| * @run main Fairness |
| * @summary Checks that fairness setting is respected. |
| */ |
| |
| import java.util.concurrent.*; |
| |
| public class Fairness { |
| private static void testFairness(boolean fair, |
| final BlockingQueue<Integer> q) |
| throws Exception |
| { |
| for (int i = 0; i < 3; i++) { |
| final Integer I = new Integer(i); |
| new Thread() { public void run() { |
| try { q.put(I); } catch (Exception e) {} |
| }}.start(); |
| Thread.currentThread().sleep(100); |
| } |
| for (int i = 0; i < 3; i++) { |
| int j = q.take().intValue(); |
| System.err.printf("%d%n",j); |
| // Non-fair queues are lifo in our implementation |
| if (fair ? j != i : j != 2-i) |
| throw new Exception("No fair!"); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| testFairness(false, new SynchronousQueue<Integer>()); |
| testFairness(false, new SynchronousQueue<Integer>(false)); |
| testFairness(true, new SynchronousQueue<Integer>(true)); |
| } |
| } |