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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/sun/management/GarbageCollectorImpl.java (1 of 18352 files). Show all

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java/pkg/sun/management/GarbageCollectorImpl.java+195−0
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1+/*
2+ * Copyright (c) 2003, 2011, 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. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+
26+package sun.management;
27+
28+import com.sun.management.GarbageCollectorMXBean;
29+import com.sun.management.GarbageCollectionNotificationInfo;
30+import java.lang.management.ManagementFactory;
31+import java.lang.management.MemoryPoolMXBean;
32+import java.lang.management.MemoryUsage;
33+
34+import com.sun.management.GcInfo;
35+import javax.management.openmbean.CompositeData;
36+import javax.management.MBeanInfo;
37+import javax.management.MBeanAttributeInfo;
38+import javax.management.ObjectName;
39+import javax.management.MBeanNotificationInfo;
40+import javax.management.Notification;
41+import javax.management.NotificationFilter;
42+import javax.management.NotificationListener;
43+import javax.management.ListenerNotFoundException;
44+
45+import java.util.List;
46+import java.util.ListIterator;
47+import java.util.Map;
48+
49+/**
50+ * Implementation class for the garbage collector.
51+ * Standard and committed hotspot-specific metrics if any.
52+ *
53+ * ManagementFactory.getGarbageCollectorMXBeans() returns a list
54+ * of instances of this class.
55+ */
56+class GarbageCollectorImpl extends MemoryManagerImpl
57+ implements GarbageCollectorMXBean {
58+
59+ GarbageCollectorImpl(String name) {
60+ super(name);
61+ }
62+
63+ public native long getCollectionCount();
64+ public native long getCollectionTime();
65+
66+
67+ // The memory pools are static and won't be changed.
68+ // TODO: If the hotspot implementation begins to have pools
69+ // dynamically created and removed, this needs to be modified.
70+ private String[] poolNames = null;
71+ synchronized String[] getAllPoolNames() {
72+ if (poolNames == null) {
73+ List pools = ManagementFactory.getMemoryPoolMXBeans();
74+ poolNames = new String[pools.size()];
75+ int i = 0;
76+ for (ListIterator iter = pools.listIterator();
77+ iter.hasNext();
78+ i++) {
79+ MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
80+ poolNames[i] = p.getName();
81+ }
82+ }
83+ return poolNames;
84+ }
85+
86+ // Sun JDK extension
87+ private GcInfoBuilder gcInfoBuilder;
88+
89+ private synchronized GcInfoBuilder getGcInfoBuilder() {
90+ if(gcInfoBuilder == null) {
91+ gcInfoBuilder = new GcInfoBuilder(this, getAllPoolNames());
92+ }
93+ return gcInfoBuilder;
94+ }
95+
96+ public GcInfo getLastGcInfo() {
97+ GcInfo info = getGcInfoBuilder().getLastGcInfo();
98+ return info;
99+ }
100+
101+ private final static String notifName =
102+ "javax.management.Notification";
103+
104+ private final static String[] gcNotifTypes = {
105+ GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION
106+ };
107+
108+ private MBeanNotificationInfo[] notifInfo = null;
109+ public MBeanNotificationInfo[] getNotificationInfo() {
110+ synchronized (this) {
111+ if (notifInfo == null) {
112+ notifInfo = new MBeanNotificationInfo[1];
113+ notifInfo[0] = new MBeanNotificationInfo(gcNotifTypes,
114+ notifName,
115+ "GC Notification");
116+ }
117+ }
118+ return notifInfo;
119+ }
120+
121+ private static long seqNumber = 0;
122+ private static long getNextSeqNumber() {
123+ return ++seqNumber;
124+ }
125+
126+ void createGCNotification(long timestamp,
127+ String gcName,
128+ String gcAction,
129+ String gcCause,
130+ GcInfo gcInfo) {
131+
132+ if (!hasListeners()) {
133+ return;
134+ }
135+
136+ Notification notif = new Notification(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION,
137+ getObjectName(),
138+ getNextSeqNumber(),
139+ timestamp,
140+ gcName);
141+ GarbageCollectionNotificationInfo info =
142+ new GarbageCollectionNotificationInfo(gcName,
143+ gcAction,
144+ gcCause,
145+ gcInfo);
146+
147+ CompositeData cd =
148+ GarbageCollectionNotifInfoCompositeData.toCompositeData(info);
149+ notif.setUserData(cd);
150+ sendNotification(notif);
151+ }
152+
153+ public synchronized void addNotificationListener(NotificationListener listener,
154+ NotificationFilter filter,
155+ Object handback)
156+ {
157+ boolean before = hasListeners();
158+ super.addNotificationListener(listener, filter, handback);
159+ boolean after = hasListeners();
160+ if (!before && after) {
161+ setNotificationEnabled(this, true);
162+ }
163+ }
164+
165+ public synchronized void removeNotificationListener(NotificationListener listener)
166+ throws ListenerNotFoundException {
167+ boolean before = hasListeners();
168+ super.removeNotificationListener(listener);
169+ boolean after = hasListeners();
170+ if (before && !after) {
171+ setNotificationEnabled(this,false);
172+ }
173+ }
174+
175+ public synchronized void removeNotificationListener(NotificationListener listener,
176+ NotificationFilter filter,
177+ Object handback)
178+ throws ListenerNotFoundException
179+ {
180+ boolean before = hasListeners();
181+ super.removeNotificationListener(listener,filter,handback);
182+ boolean after = hasListeners();
183+ if (before && !after) {
184+ setNotificationEnabled(this,false);
185+ }
186+ }
187+
188+ public ObjectName getObjectName() {
189+ return Util.newObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE, getName());
190+ }
191+
192+ native void setNotificationEnabled(GarbageCollectorMXBean gc,
193+ boolean enabled);
194+
195+}