1 /*
2 * Copyright (c) 2003, 2016, 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 4947536
27 * @summary Basic unit test of ManagementFactory.getPlatformMBeanServer()
28 * @author Mandy Chung
29 * @modules jdk.management
30 */
31
32 import java.lang.management.*;
33 import static java.lang.management.ManagementFactory.*;
34 import java.util.*;
35 import java.util.logging.LogManager;
36
37 import javax.management.MBeanServer;
38 import javax.management.ObjectName;
39
40 public class PlatformMBeanServerTest {
41 public static void main(String[] argv) throws Exception {
42 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
43 printMBeans(mbs);
44
45 // validate if all standard JVM MBeans are registered
46 checkStandardMBeans(mbs);
47
48 // validate if all platform MBeans are registered
49 checkPlatformMBeans(mbs);
50
51 MBeanServer mbs1 = ManagementFactory.getPlatformMBeanServer();
52 if (mbs != mbs1) {
53 throw new RuntimeException("Second call to getPlatformMBeanServer()"
54 + " returns a different MBeanServer.");
55 }
56
57 System.out.println("Test passed.");
58 }
59
60 private static void checkMBean(MBeanServer mbs, String mbeanName)
61 throws Exception {
62 try {
63 ObjectName objName = new ObjectName(mbeanName);
64 // We could call mbs.isRegistered(objName) here.
65 // Calling getMBeanInfo will throw exception if not found.
66 mbs.getMBeanInfo(objName);
67 } catch (Exception e) {
68 throw e;
69 }
70 }
71 private static void checkStandardMBeans(MBeanServer mbs) throws Exception {
72 checkMBean(mbs, CLASS_LOADING_MXBEAN_NAME);
73 checkMBean(mbs, MEMORY_MXBEAN_NAME);
74 checkMBean(mbs, OPERATING_SYSTEM_MXBEAN_NAME);
75 checkMBean(mbs, RUNTIME_MXBEAN_NAME);
76 checkMBean(mbs, THREAD_MXBEAN_NAME);
77 if (ManagementFactory.getCompilationMXBean() != null) {
78 checkMBean(mbs, COMPILATION_MXBEAN_NAME);
79 }
80
81 List pools = ManagementFactory.getMemoryPoolMXBeans();
82 for (ListIterator iter = pools.listIterator(); iter.hasNext(); ) {
83 MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
84 checkMBean(mbs, MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",name=" + p.getName());
85 }
86
87 // Check the number of memory pools in the mbs
88 Set set = mbs.queryNames(new ObjectName(MEMORY_POOL_MXBEAN_DOMAIN_TYPE + ",*"), null);
89 if (set.size() != pools.size()) {
90 throw new RuntimeException("Unexpected number of memory pools:" +
91 "MBeanServer has " + set.size() +
92 ". Expected = " + pools.size());
93 }
94
95 List mgrs = ManagementFactory.getMemoryManagerMXBeans();
96 int num_mgrs = 0;
97 for (ListIterator iter = mgrs.listIterator(); iter.hasNext(); ) {
98 MemoryManagerMXBean m = (MemoryManagerMXBean) iter.next();
99 if (m instanceof GarbageCollectorMXBean) {
100 checkMBean(mbs, GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE
101 + ",name=" + m.getName());
102 } else {
103 checkMBean(mbs, MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE
104 + ",name=" + m.getName());
105 num_mgrs++;
106 }
107 }
108
109 List gcs = ManagementFactory.getGarbageCollectorMXBeans();
110 for (ListIterator iter = gcs.listIterator(); iter.hasNext(); ) {
111 GarbageCollectorMXBean gc = (GarbageCollectorMXBean) iter.next();
112 checkMBean(mbs, GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE
113 + ",name=" + gc.getName());
114 }
115
116 // Check the number of memory managers and garbage collectors in the mbs
117 set = mbs.queryNames(new ObjectName(MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE + ",*"), null);
118 if (set.size() != num_mgrs) {
119 throw new RuntimeException("Unexpected number of memory managers:" +
120 "MBeanServer has " + set.size() +
121 ". Expected = " + num_mgrs);
122 }
123
124 set = mbs.queryNames(new ObjectName(GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*"), null);
125 if (set.size() != gcs.size()) {
126 throw new RuntimeException("Unexpected number of garbage collectors:" +
127 "MBeanServer has " + set.size() +
128 ". Expected = " + gcs.size());
129 }
130 }
131 private static void checkPlatformMBeans(MBeanServer mbs) throws Exception {
132 checkMBean(mbs, LogManager.LOGGING_MXBEAN_NAME);
133 }
134
135 private static void printMBeans(MBeanServer mbs) throws Exception {
136 Set set = mbs.queryNames(null, null);
137 for (Iterator iter = set.iterator(); iter.hasNext(); ) {
138 System.out.println(iter.next());
139 }
140 }
141 }