139 lines
4.5 KiB
Java
139 lines
4.5 KiB
Java
/*
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* Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4530538
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* @summary Basic unit test of
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* ThreadMXBean.setThreadContentionMonitoringEnabled()
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* and ThreadMXBean.setThreadCpuTimeEnabled().
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* @author Mandy Chung
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*
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* @run main EnableTest
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*/
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import java.lang.management.*;
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public class EnableTest {
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private static ThreadMXBean tm = ManagementFactory.getThreadMXBean();
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private static void checkThreadContentionMonitoring(boolean expectedValue)
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throws Exception {
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boolean value = tm.isThreadContentionMonitoringEnabled();
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if (value != expectedValue) {
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throw new RuntimeException("TEST FAILED: " +
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"isThreadContentionMonitoringEnabled() returns " + value +
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" but expected to be " + expectedValue);
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}
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}
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private static void testThreadContentionMonitoring()
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throws Exception {
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if (!tm.isThreadContentionMonitoringSupported()) return;
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// Test setThreadContentionMonitoringEnabled()
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checkThreadContentionMonitoring(false);
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// Check enabled once
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tm.setThreadContentionMonitoringEnabled(true);
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checkThreadContentionMonitoring(true);
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// Enable it two more times
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tm.setThreadContentionMonitoringEnabled(true);
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checkThreadContentionMonitoring(true);
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tm.setThreadContentionMonitoringEnabled(true);
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// Disable once will globally disable the thread contention monitoring
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tm.setThreadContentionMonitoringEnabled(false);
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checkThreadContentionMonitoring(false);
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tm.setThreadContentionMonitoringEnabled(false);
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checkThreadContentionMonitoring(false);
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tm.setThreadContentionMonitoringEnabled(true);
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checkThreadContentionMonitoring(true);
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}
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private static void checkThreadCpuTime(boolean expectedValue)
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throws Exception {
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boolean value = tm.isThreadCpuTimeEnabled();
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if (value != expectedValue) {
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throw new RuntimeException("TEST FAILED: " +
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"isThreadCpuTimeEnabled() returns " + value +
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" but expected to be " + expectedValue);
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}
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}
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private static void testThreadCpuTime()
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throws Exception {
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if (!tm.isThreadCpuTimeSupported()) return;
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// Test setThreadCpuTimeEnabled()
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if (!tm.isThreadCpuTimeEnabled()) {
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tm.setThreadCpuTimeEnabled(true);
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checkThreadCpuTime(true);
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}
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tm.setThreadCpuTimeEnabled(false);
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checkThreadCpuTime(false);
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tm.setThreadCpuTimeEnabled(true);
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checkThreadCpuTime(true);
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tm.setThreadCpuTimeEnabled(true);
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checkThreadCpuTime(true);
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tm.setThreadCpuTimeEnabled(true);
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// disable globally
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tm.setThreadCpuTimeEnabled(false);
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checkThreadCpuTime(false);
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tm.setThreadCpuTimeEnabled(false);
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checkThreadCpuTime(false);
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tm.setThreadCpuTimeEnabled(true);
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checkThreadCpuTime(true);
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}
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public static void main(String args[]) throws Exception {
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try {
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testThreadContentionMonitoring();
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testThreadCpuTime();
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} finally {
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// restore the default
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if (tm.isThreadContentionMonitoringSupported()) {
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tm.setThreadContentionMonitoringEnabled(false);
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}
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if (tm.isThreadCpuTimeSupported()) {
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tm.setThreadCpuTimeEnabled(false);
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}
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}
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System.out.println("Test passed.");
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}
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}
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