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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* Copyright (c) 2004, 2018, 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.
*/
package nsk.monitoring.share;
import java.lang.management.*;
import javax.management.*;
import java.io.IOException;
import java.util.*;
import nsk.share.*;
/**
* <code>GarbageCollectorMonitor</code> class is a wrapper of
* <code>GarbageCollectorMXBean</code>.
* Depending on command line arguments, an instance of this class redirects
* invocations to the <code>GarbageCollectorMXBean</code> interface. If
* <code>-testMode="directly"</code> option is set, this instance directly
* invokes corresponding method of the <code>GarbageCollectorMXBean</code>
* interface. If <code>-testMode="server"</code> option is set it will make
* invocations via MBeanServer. If <code>-testMode="proxy"</code> option
* is set it will make invocations via MBeanServer proxy.
*
* @see ArgumentHandler
*/
public class GarbageCollectorMonitor extends Monitor {
public static final String GARBAGECOLLECTOR_MXBEAN_NAME =
ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE;
private static List<GarbageCollectorMXBean> mbeans
= ManagementFactory.getGarbageCollectorMXBeans();
// Internal trace level
private static final int TRACE_LEVEL = 10;
// Names of the attributes of ClassLoadingMXBean
private static final String COLLECTION_COUNT = "CollectionCount";
private static final String COLLECTION_TIME = "CollectionTime";
static {
Monitor.logPrefix = "GarbageCollectorMonitor> ";
}
/**
* Creates a new <code>GarbageCollectorMonitor</code> object.
*
* @param log <code>Log</code> object to print info to.
* @param argumentHandler <code>ArgumentHandler</code> object that saves
* all info about test's arguments.
*
*/
public GarbageCollectorMonitor(Log log, ArgumentHandler argumentHandler) {
super(log, argumentHandler);
}
public ObjectName getMBeanObjectName() {
return mbeanObjectName;
}
public Object[] getGarbageCollectorMXBeans() {
List<Object> list = new ArrayList<Object>();
int mode = getTestMode();
switch (mode) {
case DIRECTLY_MODE:
list.addAll(mbeans);
break;
case SERVER_MODE:
try {
Set query = getMBeanServer().queryNames(null, null);
Iterator it = query.iterator();
while (it.hasNext()) {
ObjectName oname = (ObjectName)it.next();
if (oname.toString().startsWith(
GARBAGECOLLECTOR_MXBEAN_NAME + ",")) {
list.add(oname);
}
}
} catch (Exception e) {
throw new Failure(e);
}
break;
case PROXY_MODE:
try {
Set query = getMBeanServer().queryNames(null, null);
Iterator it = query.iterator();
while (it.hasNext()) {
ObjectName oname = (ObjectName)it.next();
if (oname.toString().startsWith(
GARBAGECOLLECTOR_MXBEAN_NAME + ",")) {
list.add(getProxy(oname));
}
}
} catch (Exception e) {
throw new Failure(e);
}
break;
default:
throw new TestBug("Unknown testMode " + mode);
}
return list.toArray();
}
private GarbageCollectorMXBean getProxy(ObjectName gcMXBean) {
try {
GarbageCollectorMXBean proxy = (GarbageCollectorMXBean)
ManagementFactory.newPlatformMXBeanProxy(
getMBeanServer(),
gcMXBean.toString(),
GarbageCollectorMXBean.class
);
return proxy;
} catch (Exception e) {
throw new Failure(e);
}
}
/**
* Redirects the invocation to
* {@link java.lang.management.GarbageCollectorMXBean#getCollectionCount()
* <code>GarbageCollectorMXBean.getCollectionCount()</code>}.
*
* @return the total number of collections that have occurred.
*
* @see java.lang.management.GarbageCollectorMXBean#getCollectionCount()
*/
public long getCollectionCount(Object gcMXBean) {
int mode = getTestMode();
switch (mode) {
case DIRECTLY_MODE:
return ((GarbageCollectorMXBean)gcMXBean).getCollectionCount();
case SERVER_MODE:
return getLongAttribute((ObjectName)gcMXBean,
COLLECTION_COUNT);
case PROXY_MODE:
return ((GarbageCollectorMXBean)gcMXBean).getCollectionCount();
default:
throw new TestBug("Unknown testMode " + mode);
}
}
/**
* Redirects the invocation to
* {@link java.lang.management.GarbageCollectorMXBean#getCollectionTime()
* <code>GarbageCollectorMXBean.getCollectionTime()</code>}.
*
* @return the approximate accumulated collection elapsed time
* in milliseconds.
*
* @see java.lang.management.GarbageCollectorMXBean#getCollectionTime()
*/
public long getCollectionTime(Object gcMXBean) {
int mode = getTestMode();
switch (mode) {
case DIRECTLY_MODE:
return ((GarbageCollectorMXBean)gcMXBean).getCollectionTime();
case SERVER_MODE:
return getLongAttribute(((ObjectName)gcMXBean),
COLLECTION_TIME);
case PROXY_MODE:
return ((GarbageCollectorMXBean)gcMXBean).getCollectionTime();
default:
throw new TestBug("Unknown testMode " + mode);
}
}
} // GarbageCollectorMonitor
|
