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/*
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* Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.management;
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import java.lang.management.MemoryUsage;
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import javax.management.openmbean.CompositeType;
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import javax.management.openmbean.CompositeData;
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import javax.management.openmbean.CompositeDataSupport;
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import javax.management.openmbean.OpenDataException;
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/**
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* A CompositeData for MemoryUsage for the local management support.
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* This class avoids the performance penalty paid to the
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* construction of a CompositeData use in the local case.
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*/
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public class MemoryUsageCompositeData extends LazyCompositeData {
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private final MemoryUsage usage;
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private MemoryUsageCompositeData(MemoryUsage u) {
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this.usage = u;
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}
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public MemoryUsage getMemoryUsage() {
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return usage;
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}
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public static CompositeData toCompositeData(MemoryUsage u) {
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MemoryUsageCompositeData mucd = new MemoryUsageCompositeData(u);
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return mucd.getCompositeData();
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}
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protected CompositeData getCompositeData() {
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// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
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// memoryUsageItemNames!
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final Object[] memoryUsageItemValues = {
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new Long(usage.getInit()),
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new Long(usage.getUsed()),
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new Long(usage.getCommitted()),
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new Long(usage.getMax()),
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};
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try {
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return new CompositeDataSupport(memoryUsageCompositeType,
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memoryUsageItemNames,
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memoryUsageItemValues);
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} catch (OpenDataException e) {
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// Should never reach here
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throw Util.newInternalError(e);
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}
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}
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private static final CompositeType memoryUsageCompositeType;
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static {
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try {
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memoryUsageCompositeType = (CompositeType)
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MappedMXBeanType.toOpenType(MemoryUsage.class);
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} catch (OpenDataException e) {
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// Should never reach here
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throw Util.newInternalError(e);
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}
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}
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static CompositeType getMemoryUsageCompositeType() {
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return memoryUsageCompositeType;
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}
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private static final String INIT = "init";
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private static final String USED = "used";
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private static final String COMMITTED = "committed";
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private static final String MAX = "max";
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private static final String[] memoryUsageItemNames = {
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INIT,
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USED,
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COMMITTED,
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MAX,
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};
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public static long getInit(CompositeData cd) {
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return getLong(cd, INIT);
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}
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public static long getUsed(CompositeData cd) {
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return getLong(cd, USED);
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}
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public static long getCommitted(CompositeData cd) {
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return getLong(cd, COMMITTED);
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}
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public static long getMax(CompositeData cd) {
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return getLong(cd, MAX);
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}
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/** Validate if the input CompositeData has the expected
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* CompositeType (i.e. contain all attributes with expected
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* names and types).
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*/
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public static void validateCompositeData(CompositeData cd) {
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if (cd == null) {
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throw new NullPointerException("Null CompositeData");
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}
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if (!isTypeMatched(memoryUsageCompositeType, cd.getCompositeType())) {
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throw new IllegalArgumentException(
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"Unexpected composite type for MemoryUsage");
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}
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}
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}
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