J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 4530538 |
| 27 | * @summary Basic unit test of |
| 28 | * ThreadMXBean.setThreadContentionMonitoringEnabled() |
| 29 | * and ThreadMXBean.setThreadCpuTimeEnabled(). |
| 30 | * @author Mandy Chung |
| 31 | * |
| 32 | * @run main EnableTest |
| 33 | */ |
| 34 | |
| 35 | import java.lang.management.*; |
| 36 | |
| 37 | public class EnableTest { |
| 38 | private static ThreadMXBean tm = ManagementFactory.getThreadMXBean(); |
| 39 | |
| 40 | private static void checkThreadContentionMonitoring(boolean expectedValue) |
| 41 | throws Exception { |
| 42 | boolean value = tm.isThreadContentionMonitoringEnabled(); |
| 43 | if (value != expectedValue) { |
| 44 | throw new RuntimeException("TEST FAILED: " + |
| 45 | "isThreadContentionMonitoringEnabled() returns " + value + |
| 46 | " but expected to be " + expectedValue); |
| 47 | } |
| 48 | |
| 49 | } |
| 50 | |
| 51 | private static void testThreadContentionMonitoring() |
| 52 | throws Exception { |
| 53 | if (!tm.isThreadContentionMonitoringSupported()) return; |
| 54 | |
| 55 | // Test setThreadContentionMonitoringEnabled() |
| 56 | checkThreadContentionMonitoring(false); |
| 57 | |
| 58 | // Check enabled once |
| 59 | tm.setThreadContentionMonitoringEnabled(true); |
| 60 | checkThreadContentionMonitoring(true); |
| 61 | |
| 62 | // Enable it two more times |
| 63 | tm.setThreadContentionMonitoringEnabled(true); |
| 64 | checkThreadContentionMonitoring(true); |
| 65 | |
| 66 | tm.setThreadContentionMonitoringEnabled(true); |
| 67 | |
| 68 | // Disable once will globally disable the thread contention monitoring |
| 69 | tm.setThreadContentionMonitoringEnabled(false); |
| 70 | checkThreadContentionMonitoring(false); |
| 71 | |
| 72 | tm.setThreadContentionMonitoringEnabled(false); |
| 73 | checkThreadContentionMonitoring(false); |
| 74 | |
| 75 | tm.setThreadContentionMonitoringEnabled(true); |
| 76 | checkThreadContentionMonitoring(true); |
| 77 | } |
| 78 | |
| 79 | private static void checkThreadCpuTime(boolean expectedValue) |
| 80 | throws Exception { |
| 81 | boolean value = tm.isThreadCpuTimeEnabled(); |
| 82 | if (value != expectedValue) { |
| 83 | throw new RuntimeException("TEST FAILED: " + |
| 84 | "isThreadCpuTimeEnabled() returns " + value + |
| 85 | " but expected to be " + expectedValue); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | private static void testThreadCpuTime() |
| 90 | throws Exception { |
| 91 | if (!tm.isThreadCpuTimeSupported()) return; |
| 92 | |
| 93 | // Test setThreadCpuTimeEnabled() |
| 94 | if (!tm.isThreadCpuTimeEnabled()) { |
| 95 | tm.setThreadCpuTimeEnabled(true); |
| 96 | checkThreadCpuTime(true); |
| 97 | } |
| 98 | |
| 99 | tm.setThreadCpuTimeEnabled(false); |
| 100 | checkThreadCpuTime(false); |
| 101 | |
| 102 | tm.setThreadCpuTimeEnabled(true); |
| 103 | checkThreadCpuTime(true); |
| 104 | |
| 105 | tm.setThreadCpuTimeEnabled(true); |
| 106 | checkThreadCpuTime(true); |
| 107 | |
| 108 | tm.setThreadCpuTimeEnabled(true); |
| 109 | |
| 110 | // disable globally |
| 111 | tm.setThreadCpuTimeEnabled(false); |
| 112 | checkThreadCpuTime(false); |
| 113 | |
| 114 | tm.setThreadCpuTimeEnabled(false); |
| 115 | checkThreadCpuTime(false); |
| 116 | |
| 117 | tm.setThreadCpuTimeEnabled(true); |
| 118 | checkThreadCpuTime(true); |
| 119 | } |
| 120 | |
| 121 | public static void main(String args[]) throws Exception { |
| 122 | testThreadContentionMonitoring(); |
| 123 | testThreadCpuTime(); |
| 124 | |
| 125 | System.out.println("Test passed."); |
| 126 | } |
| 127 | } |