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 26package sun.management; 27 28import java.lang.management.ManagementFactory; 29import java.lang.management.MemoryManagerMXBean; 30import java.lang.management.MemoryPoolMXBean; 31 32import javax.management.MBeanNotificationInfo; 33import javax.management.ObjectName; 34 35/** 36 * Implementation class for a memory manager. 37 * Standard and committed hotspot-specific metrics if any. 38 * 39 * ManagementFactory.getMemoryManagerMXBeans() returns a list 40 * of instances of this class. 41 */ 42class MemoryManagerImpl extends NotificationEmitterSupport 43 implements MemoryManagerMXBean { 44 45 private final String name; 46 private final boolean isValid; 47 private MemoryPoolMXBean[] pools; 48 49 MemoryManagerImpl(String name) { 50 this.name = name; 51 this.isValid = true; 52 this.pools = null; 53 } 54 55 public String getName() { 56 return name; 57 } 58 59 public boolean isValid() { 60 return isValid; 61 } 62 63 public String[] getMemoryPoolNames() { 64 MemoryPoolMXBean[] ps = getMemoryPools(); 65 66 String[] names = new String[ps.length]; 67 for (int i = 0; i < ps.length; i++) { 68 names[i] = ps[i].getName(); 69 } 70 return names; 71 } 72 73 synchronized MemoryPoolMXBean[] getMemoryPools() { 74 if (pools == null) { 75 pools = getMemoryPools0(); 76 } 77 return pools; 78 } 79 private native MemoryPoolMXBean[] getMemoryPools0(); 80 81 private MBeanNotificationInfo[] notifInfo = null; 82 public MBeanNotificationInfo[] getNotificationInfo() { 83 synchronized (this) { 84 if(notifInfo == null) { 85 notifInfo = new MBeanNotificationInfo[0]; 86 } 87 } 88 return notifInfo; 89 } 90 91 public ObjectName getObjectName() { 92 return Util.newObjectName(ManagementFactory.MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE, getName()); 93 } 94 95} 96