/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.platform.mbean;
import static org.jboss.as.platform.mbean.PlatformMBeanUtil.escapeMBeanName;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.registry.AttributeAccess;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.dmr.ModelNode;
/**
* Handles read-attribute and write-attribute for the resource representing {@link java.lang.management.GarbageCollectorMXBean}.
*
* @author Brian Stansberry (c) 2011 Red Hat Inc.
*/
public class GarbageCollectorMXBeanAttributeHandler extends AbstractPlatformMBeanAttributeHandler {
public static GarbageCollectorMXBeanAttributeHandler INSTANCE = new GarbageCollectorMXBeanAttributeHandler();
private GarbageCollectorMXBeanAttributeHandler() {
}
@Override
protected void executeReadAttribute(OperationContext context, ModelNode operation) throws OperationFailedException {
final String gcName = PathAddress.pathAddress(operation.require(ModelDescriptionConstants.OP_ADDR)).getLastElement().getValue();
final String name = operation.require(ModelDescriptionConstants.NAME).asString();
GarbageCollectorMXBean gcMBean = null;
for (GarbageCollectorMXBean mbean : ManagementFactory.getGarbageCollectorMXBeans()) {
if (gcName.equals(escapeMBeanName(mbean.getName()))) {
gcMBean = mbean;
}
}
if (gcMBean == null) {
throw new OperationFailedException(new ModelNode().set(String.format("No GarbageCollectorMXBean with name %s currently exists", gcName)));
}
if (PlatformMBeanUtil.JVM_MAJOR_VERSION > 6 && PlatformMBeanConstants.OBJECT_NAME.equals(name)) {
final String objName = PlatformMBeanUtil.getObjectNameStringWithNameKey(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE, gcName);
context.getResult().set(objName);
} else if (ModelDescriptionConstants.NAME.equals(name)) {
context.getResult().set(escapeMBeanName(gcMBean.getName()));
} else if (PlatformMBeanConstants.VALID.equals(name)) {
context.getResult().set(gcMBean.isValid());
} else if (PlatformMBeanConstants.MEMORY_POOL_NAMES.equals(name)) {
final ModelNode result = context.getResult();
result.setEmptyList();
for (String pool : gcMBean.getMemoryPoolNames()) {
result.add(escapeMBeanName(pool));
}
} else if (PlatformMBeanConstants.COLLECTION_COUNT.equals(name)) {
context.getResult().set(gcMBean.getCollectionCount());
} else if (PlatformMBeanConstants.COLLECTION_TIME.equals(name)) {
context.getResult().set(gcMBean.getCollectionTime());
} else if (PlatformMBeanConstants.GARBAGE_COLLECTOR_READ_ATTRIBUTES.contains(name)
|| PlatformMBeanConstants.GARBAGE_COLLECTOR_METRICS.contains(name)) {
// Bug
throw new IllegalStateException(String.format("Read support for attribute %s was not properly implemented", name));
} else {
// Shouldn't happen; the global handler should reject
throw unknownAttribute(operation);
}
}
@Override
protected void executeWriteAttribute(OperationContext context, ModelNode operation) throws OperationFailedException {
// Shouldn't happen; the global handler should reject
throw unknownAttribute(operation);
}
@Override
protected void register(ManagementResourceRegistration registration) {
if (PlatformMBeanUtil.JVM_MAJOR_VERSION > 6) {
registration.registerReadOnlyAttribute(PlatformMBeanConstants.OBJECT_NAME, this, AttributeAccess.Storage.RUNTIME);
}
for (String attribute : PlatformMBeanConstants.GARBAGE_COLLECTOR_READ_ATTRIBUTES) {
registration.registerReadOnlyAttribute(attribute, this, AttributeAccess.Storage.RUNTIME);
}
for (String attribute : PlatformMBeanConstants.GARBAGE_COLLECTOR_METRICS) {
registration.registerMetric(attribute, this);
}
}
}