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1   /**
2    * Copyright 2011 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  package org.apache.hadoop.hbase.regionserver;
21  
22  import java.util.concurrent.atomic.AtomicLong;
23  
24  /**
25   * RegionServerAccounting keeps record of some basic real time information about
26   * the Region Server. Currently, it only keeps record the global memstore size. 
27   */
28  public class RegionServerAccounting {
29  
30    private final AtomicLong atomicGlobalMemstoreSize = new AtomicLong(0);
31    
32    /**
33     * @return the global Memstore size in the RegionServer
34     */
35    public long getGlobalMemstoreSize() {
36      return atomicGlobalMemstoreSize.get();
37    }
38    
39    /**
40     * @param memStoreSize the Memstore size will be added to 
41     *        the global Memstore size 
42     * @return the global Memstore size in the RegionServer 
43     */
44    public long addAndGetGlobalMemstoreSize(long memStoreSize) {
45      return atomicGlobalMemstoreSize.addAndGet(memStoreSize);
46    }
47   
48  }