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/*
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* Copyright 2005-2006 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.MonitorInfo;
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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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import java.util.Set;
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/**
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* A CompositeData for MonitorInfo 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 MonitorInfoCompositeData extends LazyCompositeData {
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private final MonitorInfo lock;
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private MonitorInfoCompositeData(MonitorInfo mi) {
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this.lock = mi;
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}
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public MonitorInfo getMonitorInfo() {
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return lock;
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}
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public static CompositeData toCompositeData(MonitorInfo mi) {
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MonitorInfoCompositeData micd = new MonitorInfoCompositeData(mi);
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return micd.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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// monitorInfoItemNames!
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int len = monitorInfoItemNames.length;
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Object[] values = new Object[len];
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CompositeData li = LockDataConverter.toLockInfoCompositeData(lock);
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for (int i = 0; i < len; i++) {
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String item = monitorInfoItemNames[i];
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if (item.equals(LOCKED_STACK_FRAME)) {
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StackTraceElement ste = lock.getLockedStackFrame();
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values[i] = (ste != null ? StackTraceElementCompositeData.
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toCompositeData(ste)
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: null);
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} else if (item.equals(LOCKED_STACK_DEPTH)) {
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values[i] = new Integer(lock.getLockedStackDepth());
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} else {
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values[i] = li.get(item);
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}
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}
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try {
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return new CompositeDataSupport(monitorInfoCompositeType,
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monitorInfoItemNames,
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values);
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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 monitorInfoCompositeType;
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private static final String[] monitorInfoItemNames;
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static {
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try {
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monitorInfoCompositeType = (CompositeType)
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MappedMXBeanType.toOpenType(MonitorInfo.class);
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Set<String> s = monitorInfoCompositeType.keySet();
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monitorInfoItemNames = (String[]) s.toArray(new String[0]);
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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 getMonitorInfoCompositeType() {
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return monitorInfoCompositeType;
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}
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private static final String CLASS_NAME = "className";
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private static final String IDENTITY_HASH_CODE = "identityHashCode";
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private static final String LOCKED_STACK_FRAME = "lockedStackFrame";
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private static final String LOCKED_STACK_DEPTH = "lockedStackDepth";
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public static String getClassName(CompositeData cd) {
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return getString(cd, CLASS_NAME);
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}
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public static int getIdentityHashCode(CompositeData cd) {
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return getInt(cd, IDENTITY_HASH_CODE);
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}
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public static StackTraceElement getLockedStackFrame(CompositeData cd) {
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CompositeData ste = (CompositeData) cd.get(LOCKED_STACK_FRAME);
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if (ste != null) {
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return StackTraceElementCompositeData.from(ste);
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} else {
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return null;
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}
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}
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public static int getLockedStackDepth(CompositeData cd) {
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return getInt(cd, LOCKED_STACK_DEPTH);
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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(monitorInfoCompositeType, cd.getCompositeType())) {
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throw new IllegalArgumentException(
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"Unexpected composite type for MonitorInfo");
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}
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}
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}
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