1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* Copyright (c) 2005, 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 6320211
* @summary Check that java.lang.management MXBeans have the same behavior
* as user MXBeans
* @author Eamonn McManus
* @modules jdk.management
* @run main/othervm MXBeanBehavior
*/
import java.lang.management.*;
import java.lang.reflect.*;
import java.util.*;
import javax.management.*;
public class MXBeanBehavior {
// Exclude list: list of platform MBeans that are not MXBeans
public static final HashSet<String> excludeList = new HashSet<>(
Arrays.asList("com.sun.management:type=DiagnosticCommand"));
public static void main(String[] args) throws Exception {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
/* Test that all the MBeans in the java.* and com.sun.management*
domains are MXBeans with the appropriate behavior. */
Set<ObjectName> names = mbs.queryNames(new ObjectName("java.*:*"),
null);
names.addAll(mbs.queryNames(new ObjectName("com.sun.management*:*"),
null));
for (ObjectName name : names)
test(mbs, name);
/* Now do some rudimentary testing of inter-MXBean references.
It should be possible for a user MXBean to return e.g. the
CompilationMXBean from the platform from an attribute of
type CompilationMXBean, and have the MXBean infrastructure
map this into that MXBean's standard ObjectName. It should
also be possible for a proxy for this user MXBean to have
this attribute's value mapped back into a CompilationMXBean
instance, which however will be another proxy rather than
the original object. Finally, it should be possible to set
the attribute in the user's MXBean through a proxy, giving
the real CompilationMXBean as an argument, and have this be
translated into that MXBean's standard ObjectName. The
user's MXBean will receive a proxy in this case, though we
don't check that. */
ObjectName refName = new ObjectName("d:type=CompilationRef");
mbs.registerMBean(new CompilationImpl(), refName);
CompilationRefMXBean refProxy =
JMX.newMXBeanProxy(mbs, refName, CompilationRefMXBean.class);
refProxy.getCompilationMXBean();
refProxy.setCompilationMXBean(ManagementFactory.getCompilationMXBean());
ObjectName on =
(ObjectName) mbs.getAttribute(refName, "CompilationMXBean");
checkEqual(on, new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME),
"Referenced object name");
mbs.setAttribute(refName, new Attribute("CompilationMXBean", on));
System.out.println("TEST PASSED");
}
/* Check the behavior of this MXBean to ensure that it conforms to
what is expected of all MXBeans as detailed in
javax.management.MXBean. Its MBeanInfo should have a
Descriptor with the fields mxbean and interfaceClassName, and
furthermore we know that our implementation sets immutableInfo
here. Each attribute should have Descriptor with the fields
openType and originalType that have appropriate values. We
don't currently check operations though the same considerations
would apply there. (If the MBeanInfo and MBeanAttributeInfo
tests pass we can reasonably suppose that this MXBean will
behave the same as all other MXBeans, so MBeanOperationInfo,
MBeanNotificationInfo, and MBeanConstructorInfo will be covered
by generic MXBean tests.
*/
private static void test(MBeanServer mbs, ObjectName name) throws Exception {
if(excludeList.contains(name.getCanonicalName())) {
// Skipping not MXBean objects.
return;
}
System.out.println("Testing: " + name);
MBeanInfo mbi = mbs.getMBeanInfo(name);
Descriptor mbid = mbi.getDescriptor();
Object[] values = mbid.getFieldValues("immutableInfo",
"interfaceClassName",
"mxbean");
checkEqual(values[0], "true", name + " immutableInfo field");
checkEqual(values[2], "true", name + " mxbean field");
String interfaceClassName = (String) values[1];
if (!mbs.isInstanceOf(name, interfaceClassName)) {
throw new RuntimeException(name + " not instance of " +
interfaceClassName);
}
Class interfaceClass = Class.forName(interfaceClassName);
for (MBeanAttributeInfo mbai : mbi.getAttributes()) {
Descriptor mbaid = mbai.getDescriptor();
Object[] avalues = mbaid.getFieldValues("openType",
"originalType");
if (avalues[0] == null || avalues[1] == null) {
throw new RuntimeException("Null attribute descriptor fields: " +
Arrays.toString(avalues));
}
if (mbai.isReadable()) {
String mname = (mbai.isIs() ? "is" : "get") + mbai.getName();
Method m = interfaceClass.getMethod(mname);
Type t = m.getGenericReturnType();
String ret =
(t instanceof Class) ? ((Class) t).getName() : t.toString();
if (!ret.equals(avalues[1])) {
final String msg =
name + " attribute " + mbai.getName() + " has wrong " +
"originalType: " + avalues[1] + " vs " + ret;
throw new RuntimeException(msg);
}
}
}
}
private static void checkEqual(Object x, Object y, String what) {
final boolean eq;
if (x == y)
eq = true;
else if (x == null)
eq = false;
else
eq = x.equals(y);
if (!eq)
throw new RuntimeException(what + " should be " + y + ", is " + x);
}
public static interface CompilationRefMXBean {
public CompilationMXBean getCompilationMXBean();
public void setCompilationMXBean(CompilationMXBean mxb);
}
public static class CompilationImpl implements CompilationRefMXBean {
public CompilationMXBean getCompilationMXBean() {
return ManagementFactory.getCompilationMXBean();
}
public void setCompilationMXBean(CompilationMXBean mxb) {
if (mxb == ManagementFactory.getCompilationMXBean())
return;
MBeanServerInvocationHandler mbsih = (MBeanServerInvocationHandler)
Proxy.getInvocationHandler(mxb);
ObjectName expectedName;
try {
expectedName =
new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME);
} catch (MalformedObjectNameException e) {
throw new RuntimeException(e);
}
checkEqual(mbsih.getObjectName(), expectedName,
"Proxy name in setCompilationMXBean");
}
}
}
|
