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/*
* Copyright (c) 2003, 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4947536
* @summary Basic unit test of ManagementFactory.getPlatformMBeanServer()
* @author Mandy Chung
*
* @modules java.logging
* jdk.management
*/
import java.lang.management.*;
import static java.lang.management.ManagementFactory.*;
import java.util.*;
import java.util.logging.LogManager;
import javax.management.MBeanServer;
import javax.management.ObjectName;
public class PlatformMBeanServerTest {
public static void main(String[] argv) throws Exception {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
printMBeans(mbs);
// validate if all standard JVM MBeans are registered
checkStandardMBeans(mbs);
// validate if all platform MBeans are registered
checkPlatformMBeans(mbs);
MBeanServer mbs1 = ManagementFactory.getPlatformMBeanServer();
if (mbs != mbs1) {
throw new RuntimeException("Second call to getPlatformMBeanServer()"
+ " returns a different MBeanServer.");
}
System.out.println("Test passed.");
}
private static void checkMBean(MBeanServer mbs, String mbeanName)
throws Exception {
try {
ObjectName objName = new ObjectName(mbeanName);
// We could call mbs.isRegistered(objName) here.
// Calling getMBeanInfo will throw exception if not found.
mbs.getMBeanInfo(objName);
} catch (Exception e) {
throw e;
}
}
private static void checkStandardMBeans(MBeanServer mbs) throws Exception {
checkMBean(mbs, CLASS_LOADING_MXBEAN_NAME);
checkMBean(mbs, MEMORY_MXBEAN_NAME);
checkMBean(mbs, OPERATING_SYSTEM_MXBEAN_NAME);
checkMBean(mbs, RUNTIME_MXBEAN_NAME);
checkMBean(mbs, THREAD_MXBEAN_NAME);
if (ManagementFactory.getCompilationMXBean() != null) {
checkMBean(mbs, COMPILATION_MXBEAN_NAME);
}
List pools = ManagementFactory.getMemoryPoolMXBeans();
for (ListIterator iter = pools.listIterator(); iter.hasNext(); ) {
MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
checkMBean(mbs, MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",name=" + p.getName());
}
// Check the number of memory pools in the mbs
Set set = mbs.queryNames(new ObjectName(MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",*"), null);
if (set.size() != pools.size()) {
throw new RuntimeException("Unexpected number of memory pools:" +
"MBeanServer has " + set.size() +
". Expected = " + pools.size());
}
List mgrs = ManagementFactory.getMemoryManagerMXBeans();
int num_mgrs = 0;
for (ListIterator iter = mgrs.listIterator(); iter.hasNext(); ) {
MemoryManagerMXBean m = (MemoryManagerMXBean) iter.next();
if (m instanceof GarbageCollectorMXBean) {
checkMBean(mbs, GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE
+ ",name=" + m.getName());
} else {
checkMBean(mbs, MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE
+ ",name=" + m.getName());
num_mgrs++;
}
}
List gcs = ManagementFactory.getGarbageCollectorMXBeans();
for (ListIterator iter = gcs.listIterator(); iter.hasNext(); ) {
GarbageCollectorMXBean gc = (GarbageCollectorMXBean) iter.next();
checkMBean(mbs, GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE
+ ",name=" + gc.getName());
}
// Check the number of memory managers and garbage collectors in the mbs
set = mbs.queryNames(new ObjectName(MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE + ",*"), null);
if (set.size() != num_mgrs) {
throw new RuntimeException("Unexpected number of memory managers:" +
"MBeanServer has " + set.size() +
". Expected = " + num_mgrs);
}
set = mbs.queryNames(new ObjectName(GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*"), null);
if (set.size() != gcs.size()) {
throw new RuntimeException("Unexpected number of garbage collectors:" +
"MBeanServer has " + set.size() +
". Expected = " + gcs.size());
}
}
private static void checkPlatformMBeans(MBeanServer mbs) throws Exception {
checkMBean(mbs, LogManager.LOGGING_MXBEAN_NAME);
}
private static void printMBeans(MBeanServer mbs) throws Exception {
Set set = mbs.queryNames(null, null);
for (Iterator iter = set.iterator(); iter.hasNext(); ) {
System.out.println(iter.next());
}
}
}
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