1 /* 2 * Copyright (c) 2003, 2015, 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 4530538 27 * @summary Basic unit test of 28 * ThreadMXBean.setThreadContentionMonitoringEnabled() 29 * and ThreadMXBean.setThreadCpuTimeEnabled(). 30 * @author Mandy Chung 31 * 32 * @modules java.management 33 * @run main EnableTest 34 */ 35 36 import java.lang.management.*; 37 38 public class EnableTest { 39 private static ThreadMXBean tm = ManagementFactory.getThreadMXBean(); 40 41 private static void checkThreadContentionMonitoring(boolean expectedValue) 42 throws Exception { 43 boolean value = tm.isThreadContentionMonitoringEnabled(); 44 if (value != expectedValue) { 45 throw new RuntimeException("TEST FAILED: " + 46 "isThreadContentionMonitoringEnabled() returns " + value + 47 " but expected to be " + expectedValue); 48 } 49 50 } 51 52 private static void testThreadContentionMonitoring() 53 throws Exception { 54 if (!tm.isThreadContentionMonitoringSupported()) return; 55 56 // Test setThreadContentionMonitoringEnabled() 57 checkThreadContentionMonitoring(false); 58 59 // Check enabled once 60 tm.setThreadContentionMonitoringEnabled(true); 61 checkThreadContentionMonitoring(true); 62 63 // Enable it two more times 64 tm.setThreadContentionMonitoringEnabled(true); 65 checkThreadContentionMonitoring(true); 66 67 tm.setThreadContentionMonitoringEnabled(true); 68 69 // Disable once will globally disable the thread contention monitoring 70 tm.setThreadContentionMonitoringEnabled(false); 71 checkThreadContentionMonitoring(false); 72 73 tm.setThreadContentionMonitoringEnabled(false); 74 checkThreadContentionMonitoring(false); 75 76 tm.setThreadContentionMonitoringEnabled(true); 77 checkThreadContentionMonitoring(true); 78 } 79 80 private static void checkThreadCpuTime(boolean expectedValue) 81 throws Exception { 82 boolean value = tm.isThreadCpuTimeEnabled(); 83 if (value != expectedValue) { 84 throw new RuntimeException("TEST FAILED: " + 85 "isThreadCpuTimeEnabled() returns " + value + 86 " but expected to be " + expectedValue); 87 } 88 } 89 90 private static void testThreadCpuTime() 91 throws Exception { 92 if (!tm.isThreadCpuTimeSupported()) return; 93 94 // Test setThreadCpuTimeEnabled() 95 if (!tm.isThreadCpuTimeEnabled()) { 96 tm.setThreadCpuTimeEnabled(true); 97 checkThreadCpuTime(true); 98 } 99 100 tm.setThreadCpuTimeEnabled(false); 101 checkThreadCpuTime(false); 102 103 tm.setThreadCpuTimeEnabled(true); 104 checkThreadCpuTime(true); 105 106 tm.setThreadCpuTimeEnabled(true); 107 checkThreadCpuTime(true); 108 109 tm.setThreadCpuTimeEnabled(true); 110 111 // disable globally 112 tm.setThreadCpuTimeEnabled(false); 113 checkThreadCpuTime(false); 114 115 tm.setThreadCpuTimeEnabled(false); 116 checkThreadCpuTime(false); 117 118 tm.setThreadCpuTimeEnabled(true); 119 checkThreadCpuTime(true); 120 } 121 122 public static void main(String args[]) throws Exception { 123 try { 124 testThreadContentionMonitoring(); 125 testThreadCpuTime(); 126 } finally { 127 // restore the default 128 if (tm.isThreadContentionMonitoringSupported()) { 129 tm.setThreadContentionMonitoringEnabled(false); 130 } 131 if (tm.isThreadCpuTimeSupported()) { 132 tm.setThreadCpuTimeEnabled(false); 133 } 134 } 135 136 137 System.out.println("Test passed."); 138 } 139 }