001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase;
019
020import java.util.HashMap;
021import java.util.Map;
022import org.apache.yetus.audience.InterfaceAudience;
023
024@InterfaceAudience.Private
025public final class CacheEvictionStatsBuilder {
026  long evictedBlocks = 0;
027  long maxCacheSize = 0;
028  Map<byte[], Throwable> exceptions = new HashMap<>();
029
030  CacheEvictionStatsBuilder() {
031  }
032
033  public CacheEvictionStatsBuilder withEvictedBlocks(long evictedBlocks) {
034    this.evictedBlocks = evictedBlocks;
035    return this;
036  }
037
038  public CacheEvictionStatsBuilder withMaxCacheSize(long maxCacheSize) {
039    this.maxCacheSize = maxCacheSize;
040    return this;
041  }
042
043  public void addException(byte[] regionName, Throwable ie) {
044    exceptions.put(regionName, ie);
045  }
046
047  public CacheEvictionStatsBuilder append(CacheEvictionStats stats) {
048    this.evictedBlocks += stats.getEvictedBlocks();
049    this.maxCacheSize += stats.getMaxCacheSize();
050    this.exceptions.putAll(stats.getExceptions());
051    return this;
052  }
053
054  public CacheEvictionStats build() {
055    return new CacheEvictionStats(this);
056  }
057}