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.regionserver;
019
020import static org.apache.hadoop.hbase.regionserver.DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY;
021
022import java.io.IOException;
023import org.apache.hadoop.conf.Configuration;
024import org.apache.hadoop.hbase.CellComparator;
025import org.apache.hadoop.hbase.CompoundConfiguration;
026import org.apache.hadoop.hbase.regionserver.compactions.CustomDateTieredCompactionPolicy;
027import org.apache.hadoop.hbase.regionserver.compactions.CustomTieredCompactor;
028import org.apache.yetus.audience.InterfaceAudience;
029
030/**
031 * Extension of {@link DateTieredStoreEngine} that uses a pluggable value provider for extracting
032 * the value to be used for comparison in this tiered compaction. Differently from the existing Date
033 * Tiered Compaction, this doesn't yield multiple tiers or files, but rather provides two tiers
034 * based on a configurable “cut-off” age. All rows with the cell tiering value older than this
035 * “cut-off” age would be placed together in an “old” tier, whilst younger rows would go to a
036 * separate, “young” tier file.
037 */
038@InterfaceAudience.Private
039public class CustomTieredStoreEngine extends DateTieredStoreEngine {
040
041  @Override
042  protected void createComponents(Configuration conf, HStore store, CellComparator kvComparator)
043    throws IOException {
044    CompoundConfiguration config = new CompoundConfiguration();
045    config.add(conf);
046    config.add(store.conf);
047    config.set(DEFAULT_COMPACTION_POLICY_CLASS_KEY,
048      CustomDateTieredCompactionPolicy.class.getName());
049    createCompactionPolicy(config, store);
050    this.storeFileManager = new DefaultStoreFileManager(kvComparator,
051      StoreFileComparators.SEQ_ID_MAX_TIMESTAMP, config, compactionPolicy.getConf());
052    this.storeFlusher = new DefaultStoreFlusher(config, store);
053    this.compactor = new CustomTieredCompactor(config, store);
054  }
055
056}