001/*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.regionserver;
020
021import java.util.concurrent.LinkedBlockingQueue;
022import java.util.concurrent.ThreadFactory;
023import java.util.concurrent.ThreadPoolExecutor;
024import java.util.concurrent.TimeUnit;
025
026import org.apache.hadoop.hbase.client.RegionInfo;
027import org.apache.hadoop.hbase.wal.WAL;
028import org.apache.yetus.audience.InterfaceAudience;
029
030import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
031
032/**
033 * Services a Store needs from a Region.
034 * RegionServicesForStores class is the interface through which memstore access services at the
035 * region level.
036 * For example, when using alternative memory formats or due to compaction the memstore needs to
037 * take occasional lock and update size counters at the region level.
038 */
039@InterfaceAudience.Private
040public class RegionServicesForStores {
041
042  private static final int POOL_SIZE = 10;
043  private static final ThreadPoolExecutor INMEMORY_COMPACTION_POOL =
044      new ThreadPoolExecutor(POOL_SIZE, POOL_SIZE, 60, TimeUnit.SECONDS,
045          new LinkedBlockingQueue<>(),
046          new ThreadFactory() {
047            @Override
048            public Thread newThread(Runnable r) {
049              String name = Thread.currentThread().getName() + "-inmemoryCompactions-" +
050                  System.currentTimeMillis();
051              return new Thread(r, name);
052            }
053          });
054  private final HRegion region;
055
056  public RegionServicesForStores(HRegion region) {
057    this.region = region;
058  }
059
060  public void blockUpdates() {
061    region.blockUpdates();
062  }
063
064  public void unblockUpdates() {
065    region.unblockUpdates();
066  }
067
068  public void addMemStoreSize(long dataSizeDelta, long heapSizeDelta, long offHeapSizeDelta) {
069    region.incMemStoreSize(dataSizeDelta, heapSizeDelta, offHeapSizeDelta);
070  }
071
072  public RegionInfo getRegionInfo() {
073    return region.getRegionInfo();
074  }
075
076  public WAL getWAL() {
077    return region.getWAL();
078  }
079
080  public ThreadPoolExecutor getInMemoryCompactionPool() { return INMEMORY_COMPACTION_POOL; }
081
082  public long getMemStoreFlushSize() {
083    return region.getMemStoreFlushSize();
084  }
085
086  public int getNumStores() {
087    return region.getTableDescriptor().getColumnFamilyCount();
088  }
089
090  @VisibleForTesting
091  long getMemStoreSize() {
092    return region.getMemStoreDataSize();
093  }
094}