/*
 * Copyright (c) 2011, 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.GcInfo;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.lang.reflect.Field;
import java.util.HashMap;
import sun.management.LazyCompositeData;
import static sun.management.LazyCompositeData.getString;
import sun.management.Util;

A CompositeData for GarbageCollectionNotificationInfo for the local management support. This class avoids the performance penalty paid to the construction of a CompositeData use in the local case.
/** * A CompositeData for GarbageCollectionNotificationInfo for the local management support. * This class avoids the performance penalty paid to the * construction of a CompositeData use in the local case. */
public class GarbageCollectionNotifInfoCompositeData extends LazyCompositeData { private final GarbageCollectionNotificationInfo gcNotifInfo; public GarbageCollectionNotifInfoCompositeData(GarbageCollectionNotificationInfo info) { this.gcNotifInfo = info; } public GarbageCollectionNotificationInfo getGarbageCollectionNotifInfo() { return gcNotifInfo; } public static CompositeData toCompositeData(GarbageCollectionNotificationInfo info) { GarbageCollectionNotifInfoCompositeData gcnicd = new GarbageCollectionNotifInfoCompositeData(info); return gcnicd.getCompositeData(); } private CompositeType getCompositeTypeByBuilder() { final GcInfoBuilder builder = AccessController.doPrivileged (new PrivilegedAction<GcInfoBuilder>() { public GcInfoBuilder run() { try { Class<?> cl = Class.forName("com.sun.management.GcInfo"); Field f = cl.getDeclaredField("builder"); f.setAccessible(true); return (GcInfoBuilder)f.get(gcNotifInfo.getGcInfo()); } catch(ClassNotFoundException | NoSuchFieldException | IllegalAccessException e) { return null; } } }); CompositeType gict = null; synchronized(compositeTypeByBuilder) { gict = compositeTypeByBuilder.get(builder); if(gict == null) { OpenType<?>[] gcNotifInfoItemTypes = new OpenType<?>[] { SimpleType.STRING, SimpleType.STRING, SimpleType.STRING, builder.getGcInfoCompositeType(), }; try { final String typeName = "sun.management.GarbageCollectionNotifInfoCompositeType"; gict = new CompositeType(typeName, "CompositeType for GC notification info", gcNotifInfoItemNames, gcNotifInfoItemNames, gcNotifInfoItemTypes); compositeTypeByBuilder.put(builder,gict); } catch (OpenDataException e) { // shouldn't reach here throw new RuntimeException(e); } } } return gict; } protected CompositeData getCompositeData() { // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH // gcNotifInfoItemNames! final Object[] gcNotifInfoItemValues; gcNotifInfoItemValues = new Object[] { gcNotifInfo.getGcName(), gcNotifInfo.getGcAction(), gcNotifInfo.getGcCause(), GcInfoCompositeData.toCompositeData(gcNotifInfo.getGcInfo()) }; CompositeType gict = getCompositeTypeByBuilder(); try { return new CompositeDataSupport(gict, gcNotifInfoItemNames, gcNotifInfoItemValues); } catch (OpenDataException e) { // Should never reach here throw new AssertionError(e); } } // private static MappedMXBeanType gcInfoMapType; private static final String GC_NAME = "gcName"; private static final String GC_ACTION = "gcAction"; private static final String GC_CAUSE = "gcCause"; private static final String GC_INFO = "gcInfo"; private static final String[] gcNotifInfoItemNames = { GC_NAME, GC_ACTION, GC_CAUSE, GC_INFO }; private static HashMap<GcInfoBuilder,CompositeType> compositeTypeByBuilder = new HashMap<>(); public static String getGcName(CompositeData cd) { String gcname = getString(cd, GC_NAME); if (gcname == null) { throw new IllegalArgumentException("Invalid composite data: " + "Attribute " + GC_NAME + " has null value"); } return gcname; } public static String getGcAction(CompositeData cd) { String gcaction = getString(cd, GC_ACTION); if (gcaction == null) { throw new IllegalArgumentException("Invalid composite data: " + "Attribute " + GC_ACTION + " has null value"); } return gcaction; } public static String getGcCause(CompositeData cd) { String gccause = getString(cd, GC_CAUSE); if (gccause == null) { throw new IllegalArgumentException("Invalid composite data: " + "Attribute " + GC_CAUSE + " has null value"); } return gccause; } public static GcInfo getGcInfo(CompositeData cd) { CompositeData gcInfoData = (CompositeData) cd.get(GC_INFO); return GcInfo.from(gcInfoData); }
Validate if the input CompositeData has the expected CompositeType (i.e. contain all attributes with expected names and types).
/** Validate if the input CompositeData has the expected * CompositeType (i.e. contain all attributes with expected * names and types). */
public static void validateCompositeData(CompositeData cd) { if (cd == null) { throw new NullPointerException("Null CompositeData"); } if (!isTypeMatched( getBaseGcNotifInfoCompositeType(), cd.getCompositeType())) { throw new IllegalArgumentException( "Unexpected composite type for GarbageCollectionNotificationInfo"); } } // This is only used for validation. private static CompositeType baseGcNotifInfoCompositeType = null; private static synchronized CompositeType getBaseGcNotifInfoCompositeType() { if (baseGcNotifInfoCompositeType == null) { try { OpenType<?>[] baseGcNotifInfoItemTypes = new OpenType<?>[] { SimpleType.STRING, SimpleType.STRING, SimpleType.STRING, GcInfoCompositeData.getBaseGcInfoCompositeType() }; baseGcNotifInfoCompositeType = new CompositeType("sun.management.BaseGarbageCollectionNotifInfoCompositeType", "CompositeType for Base GarbageCollectionNotificationInfo", gcNotifInfoItemNames, gcNotifInfoItemNames, baseGcNotifInfoItemTypes); } catch (OpenDataException e) { // shouldn't reach here throw new RuntimeException(e); } } return baseGcNotifInfoCompositeType; } private static final long serialVersionUID = -1805123446483771292L; }