JournalNodeActivityMBean.java

/**
 * 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.hdfs.qjournal.server;

import javax.management.ObjectName;

import org.apache.hadoop.metrics.util.MBeanUtil;
import org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase;
import org.apache.hadoop.metrics.util.MetricsRegistry;

public class JournalNodeActivityMBean extends MetricsDynamicMBeanBase {
  final private ObjectName mbeanName;

  protected JournalNodeActivityMBean(MetricsRegistry mr,
      String serverId) {
    super(mr, serverId);
    mbeanName = MBeanUtil.registerMBean("JournalNode",
        "JournalNodeActivity", this);
  }

  public void shutdown() {
    if (mbeanName != null)
      MBeanUtil.unregisterMBean(mbeanName);
  }
}