/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.util;
import org.apache.hadoop.metrics.util.MBeanUtil;
import javax.management.NotCompliantMBeanException;
import javax.management.ObjectName;
import javax.management.StandardMBean;
/**
* Allows for easier handling of MBean instances.
*/
public abstract class BeanTracker {
protected ObjectName beanName;
protected String name;
protected String serviceName;
/**
@param serviceName
*/
public BeanTracker(String serviceName) {
this.serviceName = serviceName;
}
public void register(Object beanObject) {
StandardMBean bean = this.createBean(beanObject);
beanName = MBeanUtil.registerMBean(serviceName, name, bean);
}
public void unregister() {
if (serviceName != null && name != null) {
MBeanUtil.unregisterMBean(beanName);
}
}
protected abstract StandardMBean createBean(Object beanObject);
}