72 lines
2.7 KiB
Java
72 lines
2.7 KiB
Java
/*
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* Copyright (c) 2008, 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 6610094
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* @summary Test the OperatingSystemMXBean instance returned by
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* ManagementFactory.getPlatformMXBeans()
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* @author Mandy Chung
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*
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* @modules java.management
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* jdk.management
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* @run main PlatformMXBeanTest
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*/
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import java.lang.management.*;
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import java.util.List;
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public class PlatformMXBeanTest {
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public static void main(String[] argv) throws Exception {
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OperatingSystemMXBean osMBean = getOSPlatformMXBean(OperatingSystemMXBean.class);
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// There should have only one single MXBean for the OS MXBean interfaces:
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// java.lang.management.OperatingSystemMXBean
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// com.sun.management.OperatingSystemMXBean
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// com.sun.management.UnixOperatingSystemMXBean
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if (osMBean != getOSPlatformMXBean(com.sun.management.OperatingSystemMXBean.class)) {
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throw new RuntimeException(
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"Invalid com.sun.management.OperatingSystemMXBean instance");
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}
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if (!System.getProperty("os.name").startsWith("Windows") &&
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osMBean != getOSPlatformMXBean(com.sun.management.UnixOperatingSystemMXBean.class)) {
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throw new RuntimeException(
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"Invalid com.sun.management.UnixOperatingSystemMXBean instance");
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}
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}
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private static <T extends OperatingSystemMXBean>
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T getOSPlatformMXBean(Class<T> c) {
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List<T> result = ManagementFactory.getPlatformMXBeans(c);
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if (result.isEmpty()) {
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return null;
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} else if (result.size() == 1) {
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return result.get(0);
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} else {
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throw new RuntimeException(c.getName() + " has " +
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result.size() + " number of instances");
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}
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}
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}
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