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