1 /*
2 * Copyright (c) 2005, 2013 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
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22 */
23
24 /*
25 * @test
26 * @bug 6320211
27 * @summary Check that java.lang.management MXBeans have the same behavior
28 * as user MXBeans
29 * @author Eamonn McManus
30 * @run main/othervm MXBeanBehavior
31 */
32
33 import java.lang.management.*;
34 import java.lang.reflect.*;
35 import java.util.*;
36 import javax.management.*;
37
38 public class MXBeanBehavior {
39 // Exclude list: list of platform MBeans that are not MXBeans
40 public static final HashSet<String> excludeList = new HashSet<>(
41 Arrays.asList("com.sun.management:type=DiagnosticCommand"));
42
43 public static void main(String[] args) throws Exception {
44 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
45
46 /* Test that all the MBeans in the java.* and com.sun.management*
47 domains are MXBeans with the appropriate behavior. */
48 Set<ObjectName> names = mbs.queryNames(new ObjectName("java.*:*"),
49 null);
50 names.addAll(mbs.queryNames(new ObjectName("com.sun.management*:*"),
51 null));
52 for (ObjectName name : names)
53 test(mbs, name);
54
55 /* Now do some rudimentary testing of inter-MXBean references.
56 It should be possible for a user MXBean to return e.g. the
57 CompilationMXBean from the platform from an attribute of
58 type CompilationMXBean, and have the MXBean infrastructure
59 map this into that MXBean's standard ObjectName. It should
60 also be possible for a proxy for this user MXBean to have
61 this attribute's value mapped back into a CompilationMXBean
62 instance, which however will be another proxy rather than
63 the original object. Finally, it should be possible to set
64 the attribute in the user's MXBean through a proxy, giving
65 the real CompilationMXBean as an argument, and have this be
66 translated into that MXBean's standard ObjectName. The
67 user's MXBean will receive a proxy in this case, though we
68 don't check that. */
69 ObjectName refName = new ObjectName("d:type=CompilationRef");
70 mbs.registerMBean(new CompilationImpl(), refName);
71 CompilationRefMXBean refProxy =
72 JMX.newMXBeanProxy(mbs, refName, CompilationRefMXBean.class);
73 refProxy.getCompilationMXBean();
74 refProxy.setCompilationMXBean(ManagementFactory.getCompilationMXBean());
75 ObjectName on =
76 (ObjectName) mbs.getAttribute(refName, "CompilationMXBean");
77 checkEqual(on, new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME),
78 "Referenced object name");
79 mbs.setAttribute(refName, new Attribute("CompilationMXBean", on));
80
81 System.out.println("TEST PASSED");
82 }
83
84 /* Check the behavior of this MXBean to ensure that it conforms to
85 what is expected of all MXBeans as detailed in
86 javax.management.MXBean. Its MBeanInfo should have a
87 Descriptor with the fields mxbean and interfaceClassName, and
88 furthermore we know that our implementation sets immutableInfo
89 here. Each attribute should have Descriptor with the fields
90 openType and originalType that have appropriate values. We
91 don't currently check operations though the same considerations
92 would apply there. (If the MBeanInfo and MBeanAttributeInfo
93 tests pass we can reasonably suppose that this MXBean will
94 behave the same as all other MXBeans, so MBeanOperationInfo,
95 MBeanNotificationInfo, and MBeanConstructorInfo will be covered
96 by generic MXBean tests.
97 */
98 private static void test(MBeanServer mbs, ObjectName name) throws Exception {
99 if(excludeList.contains(name.getCanonicalName())) {
100 // Skipping not MXBean objects.
101 return;
102 }
103 System.out.println("Testing: " + name);
104
105 MBeanInfo mbi = mbs.getMBeanInfo(name);
106 Descriptor mbid = mbi.getDescriptor();
107 Object[] values = mbid.getFieldValues("immutableInfo",
108 "interfaceClassName",
109 "mxbean");
110 checkEqual(values[0], "true", name + " immutableInfo field");
111 checkEqual(values[2], "true", name + " mxbean field");
112 String interfaceClassName = (String) values[1];
113 if (!mbs.isInstanceOf(name, interfaceClassName)) {
114 throw new RuntimeException(name + " not instance of " +
115 interfaceClassName);
116 }
117 Class interfaceClass = Class.forName(interfaceClassName);
118 for (MBeanAttributeInfo mbai : mbi.getAttributes()) {
119 Descriptor mbaid = mbai.getDescriptor();
120 Object[] avalues = mbaid.getFieldValues("openType",
121 "originalType");
122 if (avalues[0] == null || avalues[1] == null) {
123 throw new RuntimeException("Null attribute descriptor fields: " +
124 Arrays.toString(avalues));
125 }
126 if (mbai.isReadable()) {
127 String mname = (mbai.isIs() ? "is" : "get") + mbai.getName();
128 Method m = interfaceClass.getMethod(mname);
129 Type t = m.getGenericReturnType();
130 String ret =
131 (t instanceof Class) ? ((Class) t).getName() : t.toString();
132 if (!ret.equals(avalues[1])) {
133 final String msg =
134 name + " attribute " + mbai.getName() + " has wrong " +
135 "originalType: " + avalues[1] + " vs " + ret;
136 throw new RuntimeException(msg);
137 }
138 }
139 }
140 }
141
142 private static void checkEqual(Object x, Object y, String what) {
143 final boolean eq;
144 if (x == y)
145 eq = true;
146 else if (x == null)
147 eq = false;
148 else
149 eq = x.equals(y);
150 if (!eq)
151 throw new RuntimeException(what + " should be " + y + ", is " + x);
152 }
153
154 public static interface CompilationRefMXBean {
155 public CompilationMXBean getCompilationMXBean();
156 public void setCompilationMXBean(CompilationMXBean mxb);
157 }
158
159 public static class CompilationImpl implements CompilationRefMXBean {
160 public CompilationMXBean getCompilationMXBean() {
161 return ManagementFactory.getCompilationMXBean();
162 }
163
164 public void setCompilationMXBean(CompilationMXBean mxb) {
165 if (mxb == ManagementFactory.getCompilationMXBean())
166 return;
167 MBeanServerInvocationHandler mbsih = (MBeanServerInvocationHandler)
168 Proxy.getInvocationHandler(mxb);
169 ObjectName expectedName;
170 try {
171 expectedName =
172 new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME);
173 } catch (MalformedObjectNameException e) {
174 throw new RuntimeException(e);
175 }
176 checkEqual(mbsih.getObjectName(), expectedName,
177 "Proxy name in setCompilationMXBean");
178 }
179 }
180 }