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package sun.management;

import java.lang.management.MemoryNotificationInfo;
import java.lang.management.MemoryUsage;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.OpenDataException;

A CompositeData for MemoryNotificationInfo 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 MemoryNotificationInfo 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 MemoryNotifInfoCompositeData extends LazyCompositeData { @SuppressWarnings("serial") // Not statically typed as Serializable private final MemoryNotificationInfo memoryNotifInfo; private MemoryNotifInfoCompositeData(MemoryNotificationInfo info) { this.memoryNotifInfo = info; } public MemoryNotificationInfo getMemoryNotifInfo() { return memoryNotifInfo; } public static CompositeData toCompositeData(MemoryNotificationInfo info) { MemoryNotifInfoCompositeData mnicd = new MemoryNotifInfoCompositeData(info); return mnicd.getCompositeData(); } protected CompositeData getCompositeData() { // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH // memoryNotifInfoItemNames! final Object[] memoryNotifInfoItemValues = { memoryNotifInfo.getPoolName(), MemoryUsageCompositeData.toCompositeData(memoryNotifInfo.getUsage()), memoryNotifInfo.getCount(), }; try { return new CompositeDataSupport(memoryNotifInfoCompositeType, memoryNotifInfoItemNames, memoryNotifInfoItemValues); } catch (OpenDataException e) { // Should never reach here throw new AssertionError(e); } } private static final CompositeType memoryNotifInfoCompositeType; static { try { memoryNotifInfoCompositeType = (CompositeType) MappedMXBeanType.toOpenType(MemoryNotificationInfo.class); } catch (OpenDataException e) { // Should never reach here throw new AssertionError(e); } } private static final String POOL_NAME = "poolName"; private static final String USAGE = "usage"; private static final String COUNT = "count"; private static final String[] memoryNotifInfoItemNames = { POOL_NAME, USAGE, COUNT, }; public static String getPoolName(CompositeData cd) { String poolname = getString(cd, POOL_NAME); if (poolname == null) { throw new IllegalArgumentException("Invalid composite data: " + "Attribute " + POOL_NAME + " has null value"); } return poolname; } public static MemoryUsage getUsage(CompositeData cd) { CompositeData usageData = (CompositeData) cd.get(USAGE); return MemoryUsage.from(usageData); } public static long getCount(CompositeData cd) { return getLong(cd, COUNT); }
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(memoryNotifInfoCompositeType, cd.getCompositeType())) { throw new IllegalArgumentException( "Unexpected composite type for MemoryNotificationInfo"); } } private static final long serialVersionUID = -1805123446483771291L; }