| /* |
| * Copyright (c) 2003, 2015, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 com.sun.management.internal; |
| |
| import com.sun.management.GarbageCollectionNotificationInfo; |
| import com.sun.management.GarbageCollectorMXBean; |
| import com.sun.management.GcInfo; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.MemoryPoolMXBean; |
| import java.util.List; |
| import javax.management.ListenerNotFoundException; |
| import javax.management.MBeanNotificationInfo; |
| import javax.management.Notification; |
| import javax.management.NotificationFilter; |
| import javax.management.NotificationListener; |
| import javax.management.openmbean.CompositeData; |
| import sun.management.GarbageCollectorImpl; |
| |
| /** |
| * Implementation class for the garbage collector. |
| * Standard and committed hotspot-specific metrics if any. |
| * |
| * ManagementFactory.getGarbageCollectorMXBeans() returns a list |
| * of instances of this class. |
| */ |
| public class GarbageCollectorExtImpl extends GarbageCollectorImpl |
| implements GarbageCollectorMXBean { |
| |
| public GarbageCollectorExtImpl(String name) { |
| super(name); |
| } |
| |
| // The memory pools are static and won't be changed. |
| // TODO: If the hotspot implementation begins to have pools |
| // dynamically created and removed, this needs to be modified. |
| private String[] poolNames = null; |
| private synchronized String[] getAllPoolNames() { |
| if (poolNames == null) { |
| List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); |
| poolNames = new String[pools.size()]; |
| int i = 0; |
| for (MemoryPoolMXBean m : pools) { |
| poolNames[i++] = m.getName(); |
| } |
| } |
| return poolNames; |
| } |
| |
| public GcInfo getLastGcInfo() { |
| GcInfo info = getGcInfoBuilder().getLastGcInfo(); |
| return info; |
| } |
| |
| private final static String notifName = |
| "javax.management.Notification"; |
| |
| private final static String[] gcNotifTypes = { |
| GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION |
| }; |
| |
| public MBeanNotificationInfo[] getNotificationInfo() { |
| return new MBeanNotificationInfo[]{ |
| new MBeanNotificationInfo(gcNotifTypes, |
| notifName, |
| "GC Notification") |
| }; |
| } |
| |
| private static long seqNumber = 0; |
| private static long getNextSeqNumber() { |
| return ++seqNumber; |
| } |
| |
| protected void createGCNotification(long timestamp, |
| String gcName, |
| String gcAction, |
| String gcCause, |
| GcInfo gcInfo) { |
| if (!hasListeners()) { |
| return; |
| } |
| Notification notif = new Notification(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION, |
| getObjectName(), |
| getNextSeqNumber(), |
| timestamp, |
| gcName); |
| GarbageCollectionNotificationInfo info = |
| new GarbageCollectionNotificationInfo(gcName, |
| gcAction, |
| gcCause, |
| gcInfo); |
| |
| CompositeData cd = |
| GarbageCollectionNotifInfoCompositeData.toCompositeData(info); |
| notif.setUserData(cd); |
| sendNotification(notif); |
| } |
| |
| public synchronized void addNotificationListener(NotificationListener listener, |
| NotificationFilter filter, |
| Object handback) |
| { |
| boolean before = hasListeners(); |
| super.addNotificationListener(listener, filter, handback); |
| boolean after = hasListeners(); |
| if (!before && after) { |
| setNotificationEnabled(this, true); |
| } |
| } |
| |
| public synchronized void removeNotificationListener(NotificationListener listener) |
| throws ListenerNotFoundException { |
| boolean before = hasListeners(); |
| super.removeNotificationListener(listener); |
| boolean after = hasListeners(); |
| |
| if (before && !after) { |
| setNotificationEnabled(this,false); |
| } |
| } |
| |
| public synchronized void removeNotificationListener(NotificationListener listener, |
| NotificationFilter filter, |
| Object handback) |
| throws ListenerNotFoundException |
| { |
| boolean before = hasListeners(); |
| super.removeNotificationListener(listener,filter,handback); |
| boolean after = hasListeners(); |
| if (before && !after) { |
| setNotificationEnabled(this,false); |
| } |
| } |
| |
| private GcInfoBuilder gcInfoBuilder; |
| // Invoked also by the VM |
| private synchronized GcInfoBuilder getGcInfoBuilder() { |
| if(gcInfoBuilder == null) { |
| gcInfoBuilder = new GcInfoBuilder(this, getAllPoolNames()); |
| } |
| return gcInfoBuilder; |
| } |
| |
| private native void setNotificationEnabled(GarbageCollectorMXBean gc, |
| boolean enabled); |
| |
| // Invoked by the VM |
| private static java.lang.management.GarbageCollectorMXBean |
| createGarbageCollector(String name, String type) { |
| |
| return new GarbageCollectorExtImpl(name); |
| } |
| } |