hbase-client/src/main/java/org/apache/hadoop/hbase/CacheEvictionStatsAggregator.java

   1 /**
   2  *
   3  * Licensed to the Apache Software Foundation (ASF) under one
   4  * or more contributor license agreements.  See the NOTICE file
   5  * distributed with this work for additional information
   6  * regarding copyright ownership.  The ASF licenses this file
   7  * to you under the Apache License, Version 2.0 (the
   8  * "License"); you may not use this file except in compliance
   9  * with the License.  You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  */
  19 package org.apache.hadoop.hbase;
  20
  21 import org.apache.yetus.audience.InterfaceAudience;
  22
  23 /**
  24  * Used to merge CacheEvictionStats. Thread safe for concurrent accessing.
  25  */
  26 @InterfaceAudience.Private
  27 public class CacheEvictionStatsAggregator {
  28
  29   private final CacheEvictionStatsBuilder builder;
  30
  31   public CacheEvictionStatsAggregator() {
  32     this.builder = new CacheEvictionStatsBuilder();
  33   }
  34
  35   public synchronized void append(CacheEvictionStats stats) {
  36     this.builder.append(stats);
  37   }
  38
  39   public synchronized CacheEvictionStats sum() {
  40     return this.builder.build();
  41   }
  42 }