1 /*
2 * Copyright (c) 2005, 2016, 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.
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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 jdk.management
31 * @run main/othervm MXBeanBehavior
32 */
33
34 import java.lang.management.*;
35 import java.lang.reflect.*;
36 import java.util.*;
37 import javax.management.*;
38
39 public class MXBeanBehavior {
40 // Exclude list: list of platform MBeans that are not MXBeans
41 public static final HashSet<String> excludeList = new HashSet<>(
42 Arrays.asList("com.sun.management:type=DiagnosticCommand"));
43
44 public static void main(String[] args) throws Exception {
45 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
46
47 /* Test that all the MBeans in the java.* and com.sun.management*
48 domains are MXBeans with the appropriate behavior. */
49 Set<ObjectName> names = mbs.queryNames(new ObjectName("java.*:*"),
50 null);
51 names.addAll(mbs.queryNames(new ObjectName("com.sun.management*:*"),
52 null));
53 for (ObjectName name : names)
54 test(mbs, name);
55
56 /* Now do some rudimentary testing of inter-MXBean references.
57 It should be possible for a user MXBean to return e.g. the
58 CompilationMXBean from the platform from an attribute of
59 type CompilationMXBean, and have the MXBean infrastructure
60 map this into that MXBean's standard ObjectName. It should
61 also be possible for a proxy for this user MXBean to have
62 this attribute's value mapped back into a CompilationMXBean
63 instance, which however will be another proxy rather than
64 the original object. Finally, it should be possible to set
65 the attribute in the user's MXBean through a proxy, giving
66 the real CompilationMXBean as an argument, and have this be
67 translated into that MXBean's standard ObjectName. The
68 user's MXBean will receive a proxy in this case, though we
69 don't check that. */
70 ObjectName refName = new ObjectName("d:type=CompilationRef");
71 mbs.registerMBean(new CompilationImpl(), refName);
72 CompilationRefMXBean refProxy =
73 JMX.newMXBeanProxy(mbs, refName, CompilationRefMXBean.class);
74 refProxy.getCompilationMXBean();
75 refProxy.setCompilationMXBean(ManagementFactory.getCompilationMXBean());
76 ObjectName on =
77 (ObjectName) mbs.getAttribute(refName, "CompilationMXBean");
78 checkEqual(on, new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME),
79 "Referenced object name");
80 mbs.setAttribute(refName, new Attribute("CompilationMXBean", on));
81
82 System.out.println("TEST PASSED");
83 }
84
85 /* Check the behavior of this MXBean to ensure that it conforms to
86 what is expected of all MXBeans as detailed in
87 javax.management.MXBean. Its MBeanInfo should have a
88 Descriptor with the fields mxbean and interfaceClassName, and
89 furthermore we know that our implementation sets immutableInfo
90 here. Each attribute should have Descriptor with the fields
91 openType and originalType that have appropriate values. We
92 don't currently check operations though the same considerations
93 would apply there. (If the MBeanInfo and MBeanAttributeInfo
94 tests pass we can reasonably suppose that this MXBean will
95 behave the same as all other MXBeans, so MBeanOperationInfo,
96 MBeanNotificationInfo, and MBeanConstructorInfo will be covered
97 by generic MXBean tests.
98 */
99 private static void test(MBeanServer mbs, ObjectName name) throws Exception {
100 if(excludeList.contains(name.getCanonicalName())) {
101 // Skipping not MXBean objects.
102 return;
103 }
104 System.out.println("Testing: " + name);
105
106 MBeanInfo mbi = mbs.getMBeanInfo(name);
107 Descriptor mbid = mbi.getDescriptor();
108 Object[] values = mbid.getFieldValues("immutableInfo",
109 "interfaceClassName",
110 "mxbean");
111 checkEqual(values[0], "true", name + " immutableInfo field");
112 checkEqual(values[2], "true", name + " mxbean field");
113 String interfaceClassName = (String) values[1];
114 if (!mbs.isInstanceOf(name, interfaceClassName)) {
115 throw new RuntimeException(name + " not instance of " +
116 interfaceClassName);
117 }
118 Class interfaceClass = Class.forName(interfaceClassName);
119 for (MBeanAttributeInfo mbai : mbi.getAttributes()) {
120 Descriptor mbaid = mbai.getDescriptor();
121 Object[] avalues = mbaid.getFieldValues("openType",
122 "originalType");
123 if (avalues[0] == null || avalues[1] == null) {
124 throw new RuntimeException("Null attribute descriptor fields: " +
125 Arrays.toString(avalues));
126 }
127 if (mbai.isReadable()) {
128 String mname = (mbai.isIs() ? "is" : "get") + mbai.getName();
129 Method m = interfaceClass.getMethod(mname);
130 Type t = m.getGenericReturnType();
131 String ret =
132 (t instanceof Class) ? ((Class) t).getName() : t.toString();
133 if (!ret.equals(avalues[1])) {
134 final String msg =
135 name + " attribute " + mbai.getName() + " has wrong " +
136 "originalType: " + avalues[1] + " vs " + ret;
137 throw new RuntimeException(msg);
138 }
139 }
140 }
141 }
142
143 private static void checkEqual(Object x, Object y, String what) {
144 final boolean eq;
145 if (x == y)
146 eq = true;
147 else if (x == null)
148 eq = false;
149 else
150 eq = x.equals(y);
151 if (!eq)
152 throw new RuntimeException(what + " should be " + y + ", is " + x);
153 }
154
155 public static interface CompilationRefMXBean {
156 public CompilationMXBean getCompilationMXBean();
157 public void setCompilationMXBean(CompilationMXBean mxb);
158 }
159
160 public static class CompilationImpl implements CompilationRefMXBean {
161 public CompilationMXBean getCompilationMXBean() {
162 return ManagementFactory.getCompilationMXBean();
163 }
164
165 public void setCompilationMXBean(CompilationMXBean mxb) {
166 if (mxb == ManagementFactory.getCompilationMXBean())
167 return;
168 MBeanServerInvocationHandler mbsih = (MBeanServerInvocationHandler)
169 Proxy.getInvocationHandler(mxb);
170 ObjectName expectedName;
171 try {
172 expectedName =
173 new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME);
174 } catch (MalformedObjectNameException e) {
175 throw new RuntimeException(e);
176 }
177 checkEqual(mbsih.getObjectName(), expectedName,
178 "Proxy name in setCompilationMXBean");
179 }
180 }
181 }