MXBeanImpl.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.hbase.regionserver;

/**
 * Impl for exposing Region Server Information through JMX
 */
public class MXBeanImpl implements MXBean {

  private final HRegionServer regionServer;

  private static MXBeanImpl instance = null;
  public synchronized static MXBeanImpl init(final HRegionServer rs){
    if (instance == null) {
      instance = new MXBeanImpl(rs);
    }
    return instance;
  }

  protected MXBeanImpl(final HRegionServer rs) {
    this.regionServer = rs;
  }

  @Override
  public String[] getCoprocessors() {
    return regionServer.getCoprocessors();
  }

  @Override
  public String getZookeeperQuorum() {
    return regionServer.getZooKeeper().getQuorum();
  }

  @Override
  public String getServerName() {
    return regionServer.getServerName().getServerName();
  }

}