1 /*
2 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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.
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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 * @modules java.management
31 * jdk.management
32 * @run main/othervm MXBeanBehavior
33 */
34
35 import java.lang.management.*;
36 import java.lang.reflect.*;
37 import java.util.*;
38 import javax.management.*;
39
40 public class MXBeanBehavior {
41 // Exclude list: list of platform MBeans that are not MXBeans
42 public static final HashSet<String> excludeList = new HashSet<>(
43 Arrays.asList("com.sun.management:type=DiagnosticCommand"));
44
45 public static void main(String[] args) throws Exception {
46 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
47
48 /* Test that all the MBeans in the java.* and com.sun.management*
49 domains are MXBeans with the appropriate behavior. */
50 Set<ObjectName> names = mbs.queryNames(new ObjectName("java.*:*"),
51 null);
52 names.addAll(mbs.queryNames(new ObjectName("com.sun.management*:*"),
53 null));
54 for (ObjectName name : names)
55 test(mbs, name);
56
57 /* Now do some rudimentary testing of inter-MXBean references.
58 It should be possible for a user MXBean to return e.g. the
59 CompilationMXBean from the platform from an attribute of
60 type CompilationMXBean, and have the MXBean infrastructure
61 map this into that MXBean's standard ObjectName. It should
62 also be possible for a proxy for this user MXBean to have
63 this attribute's value mapped back into a CompilationMXBean
64 instance, which however will be another proxy rather than
65 the original object. Finally, it should be possible to set
66 the attribute in the user's MXBean through a proxy, giving
67 the real CompilationMXBean as an argument, and have this be
68 translated into that MXBean's standard ObjectName. The
69 user's MXBean will receive a proxy in this case, though we
70 don't check that. */
71 ObjectName refName = new ObjectName("d:type=CompilationRef");
72 mbs.registerMBean(new CompilationImpl(), refName);
73 CompilationRefMXBean refProxy =
74 JMX.newMXBeanProxy(mbs, refName, CompilationRefMXBean.class);
75 refProxy.getCompilationMXBean();
76 refProxy.setCompilationMXBean(ManagementFactory.getCompilationMXBean());
77 ObjectName on =
78 (ObjectName) mbs.getAttribute(refName, "CompilationMXBean");
79 checkEqual(on, new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME),
80 "Referenced object name");
81 mbs.setAttribute(refName, new Attribute("CompilationMXBean", on));
82
83 System.out.println("TEST PASSED");
84 }
85
86 /* Check the behavior of this MXBean to ensure that it conforms to
87 what is expected of all MXBeans as detailed in
88 javax.management.MXBean. Its MBeanInfo should have a
89 Descriptor with the fields mxbean and interfaceClassName, and
90 furthermore we know that our implementation sets immutableInfo
91 here. Each attribute should have Descriptor with the fields
92 openType and originalType that have appropriate values. We
93 don't currently check operations though the same considerations
94 would apply there. (If the MBeanInfo and MBeanAttributeInfo
95 tests pass we can reasonably suppose that this MXBean will
96 behave the same as all other MXBeans, so MBeanOperationInfo,
97 MBeanNotificationInfo, and MBeanConstructorInfo will be covered
98 by generic MXBean tests.
99 */
100 private static void test(MBeanServer mbs, ObjectName name) throws Exception {
101 if(excludeList.contains(name.getCanonicalName())) {
102 // Skipping not MXBean objects.
103 return;
104 }
105 System.out.println("Testing: " + name);
106
107 MBeanInfo mbi = mbs.getMBeanInfo(name);
108 Descriptor mbid = mbi.getDescriptor();
109 Object[] values = mbid.getFieldValues("immutableInfo",
110 "interfaceClassName",
111 "mxbean");
112 checkEqual(values[0], "true", name + " immutableInfo field");
113 checkEqual(values[2], "true", name + " mxbean field");
114 String interfaceClassName = (String) values[1];
115 if (!mbs.isInstanceOf(name, interfaceClassName)) {
116 throw new RuntimeException(name + " not instance of " +
117 interfaceClassName);
118 }
119 Class interfaceClass = Class.forName(interfaceClassName);
120 for (MBeanAttributeInfo mbai : mbi.getAttributes()) {
121 Descriptor mbaid = mbai.getDescriptor();
122 Object[] avalues = mbaid.getFieldValues("openType",
123 "originalType");
124 if (avalues[0] == null || avalues[1] == null) {
125 throw new RuntimeException("Null attribute descriptor fields: " +
126 Arrays.toString(avalues));
127 }
128 if (mbai.isReadable()) {
129 String mname = (mbai.isIs() ? "is" : "get") + mbai.getName();
130 Method m = interfaceClass.getMethod(mname);
131 Type t = m.getGenericReturnType();
132 String ret =
133 (t instanceof Class) ? ((Class) t).getName() : t.toString();
134 if (!ret.equals(avalues[1])) {
135 final String msg =
136 name + " attribute " + mbai.getName() + " has wrong " +
137 "originalType: " + avalues[1] + " vs " + ret;
138 throw new RuntimeException(msg);
139 }
140 }
141 }
142 }
143
144 private static void checkEqual(Object x, Object y, String what) {
145 final boolean eq;
146 if (x == y)
147 eq = true;
148 else if (x == null)
149 eq = false;
150 else
151 eq = x.equals(y);
152 if (!eq)
153 throw new RuntimeException(what + " should be " + y + ", is " + x);
154 }
155
156 public static interface CompilationRefMXBean {
157 public CompilationMXBean getCompilationMXBean();
158 public void setCompilationMXBean(CompilationMXBean mxb);
159 }
160
161 public static class CompilationImpl implements CompilationRefMXBean {
162 public CompilationMXBean getCompilationMXBean() {
163 return ManagementFactory.getCompilationMXBean();
164 }
165
166 public void setCompilationMXBean(CompilationMXBean mxb) {
167 if (mxb == ManagementFactory.getCompilationMXBean())
168 return;
169 MBeanServerInvocationHandler mbsih = (MBeanServerInvocationHandler)
170 Proxy.getInvocationHandler(mxb);
171 ObjectName expectedName;
172 try {
173 expectedName =
174 new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME);
175 } catch (MalformedObjectNameException e) {
176 throw new RuntimeException(e);
177 }
178 checkEqual(mbsih.getObjectName(), expectedName,
179 "Proxy name in setCompilationMXBean");
180 }
181 }
182 }