/*
* Copyright (c) 2004, 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 sun.management;
import java.lang.management.MemoryUsage;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.OpenDataException;
/**
* A CompositeData for MemoryUsage 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 MemoryUsageCompositeData extends LazyCompositeData {
private final MemoryUsage usage;
private MemoryUsageCompositeData(MemoryUsage u) {
this.usage = u;
}
public MemoryUsage getMemoryUsage() {
return usage;
}
public static CompositeData toCompositeData(MemoryUsage u) {
MemoryUsageCompositeData mucd = new MemoryUsageCompositeData(u);
return mucd.getCompositeData();
}
protected CompositeData getCompositeData() {
// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
// memoryUsageItemNames!
final Object[] memoryUsageItemValues = {
new Long(usage.getInit()),
new Long(usage.getUsed()),
new Long(usage.getCommitted()),
new Long(usage.getMax()),
};
try {
return new CompositeDataSupport(memoryUsageCompositeType,
memoryUsageItemNames,
memoryUsageItemValues);
} catch (OpenDataException e) {
// Should never reach here
throw Util.newInternalError(e);
}
}
private static final CompositeType memoryUsageCompositeType;
static {
try {
memoryUsageCompositeType = (CompositeType)
MappedMXBeanType.toOpenType(MemoryUsage.class);
} catch (OpenDataException e) {
// Should never reach here
throw Util.newInternalError(e);
}
}
static CompositeType getMemoryUsageCompositeType() {
return memoryUsageCompositeType;
}
private static final String INIT = "init";
private static final String USED = "used";
private static final String COMMITTED = "committed";
private static final String MAX = "max";
private static final String[] memoryUsageItemNames = {
INIT,
USED,
COMMITTED,
MAX,
};
public static long getInit(CompositeData cd) {
return getLong(cd, INIT);
}
public static long getUsed(CompositeData cd) {
return getLong(cd, USED);
}
public static long getCommitted(CompositeData cd) {
return getLong(cd, COMMITTED);
}
public static long getMax(CompositeData cd) {
return getLong(cd, MAX);
}
/** 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(memoryUsageCompositeType, cd.getCompositeType())) {
throw new IllegalArgumentException(
"Unexpected composite type for MemoryUsage");
}
}
}