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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.regionserver;
19  
20  /**
21   * Impl for exposing Region Server Information through JMX
22   */
23  public class MXBeanImpl implements MXBean {
24  
25    private final HRegionServer regionServer;
26  
27    private static MXBeanImpl instance = null;
28    public synchronized static MXBeanImpl init(final HRegionServer rs){
29      if (instance == null) {
30        instance = new MXBeanImpl(rs);
31      }
32      return instance;
33    }
34  
35    protected MXBeanImpl(final HRegionServer rs) {
36      this.regionServer = rs;
37    }
38  
39    @Override
40    public String[] getCoprocessors() {
41      return regionServer.getCoprocessors();
42    }
43  
44    @Override
45    public String getZookeeperQuorum() {
46      return regionServer.getZooKeeper().getQuorum();
47    }
48  
49    @Override
50    public String getServerName() {
51      return regionServer.getServerName().getServerName();
52    }
53  
54  }