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1   /**
2    * Copyright 2010 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  
21  package org.apache.hadoop.hbase.regionserver.metrics;
22  
23  import org.apache.hadoop.metrics.util.MBeanUtil;
24  import org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase;
25  import org.apache.hadoop.metrics.util.MetricsRegistry;
26  
27  import javax.management.ObjectName;
28  
29  /**
30   * Exports dynamic region server metric recorded in
31   * {@link RegionServerDynamicMetrics} as an MBean
32   * for JMX monitoring.
33   */
34  public class RegionServerDynamicStatistics extends MetricsDynamicMBeanBase {
35    private final ObjectName mbeanName;
36  
37    public RegionServerDynamicStatistics(MetricsRegistry registry) {
38      super(registry, "RegionServerDynamicStatistics");
39      mbeanName = MBeanUtil.registerMBean("RegionServer", "RegionServerDynamicStatistics", this);
40    }
41  
42    public void shutdown() {
43      if (mbeanName != null)
44        MBeanUtil.unregisterMBean(mbeanName);
45    }
46  
47  }