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.compactions;
019
020import java.io.IOException;
021import java.util.List;
022import java.util.Map;
023import org.apache.hadoop.conf.Configuration;
024import org.apache.hadoop.hbase.ExtendedCell;
025import org.apache.hadoop.hbase.regionserver.CustomTieringMultiFileWriter;
026import org.apache.hadoop.hbase.regionserver.DateTieredMultiFileWriter;
027import org.apache.hadoop.hbase.regionserver.HStore;
028import org.apache.yetus.audience.InterfaceAudience;
029
030@InterfaceAudience.Private
031public class CustomTieredCompactor extends DateTieredCompactor {
032
033  public static final String TIERING_VALUE_PROVIDER =
034    "hbase.hstore.custom-tiering-value.provider.class";
035  private TieringValueProvider tieringValueProvider;
036
037  public CustomTieredCompactor(Configuration conf, HStore store) throws IOException {
038    super(conf, store);
039    String className =
040      conf.get(TIERING_VALUE_PROVIDER, CustomCellTieringValueProvider.class.getName());
041    try {
042      tieringValueProvider =
043        (TieringValueProvider) Class.forName(className).getConstructor().newInstance();
044      tieringValueProvider.init(conf);
045    } catch (Exception e) {
046      throw new IOException("Unable to load configured tiering value provider '" + className + "'",
047        e);
048    }
049  }
050
051  @Override
052  protected List<ExtendedCell> decorateCells(List<ExtendedCell> cells) {
053    return tieringValueProvider.decorateCells(cells);
054  }
055
056  @Override
057  protected DateTieredMultiFileWriter createMultiWriter(final CompactionRequestImpl request,
058    final List<Long> lowerBoundaries, final Map<Long, String> lowerBoundariesPolicies) {
059    return new CustomTieringMultiFileWriter(lowerBoundaries, lowerBoundariesPolicies,
060      needEmptyFile(request), CustomTieredCompactor.this.tieringValueProvider::getTieringValue);
061  }
062
063  public interface TieringValueProvider {
064
065    void init(Configuration configuration) throws Exception;
066
067    default List<ExtendedCell> decorateCells(List<ExtendedCell> cells) {
068      return cells;
069    }
070
071    long getTieringValue(ExtendedCell cell);
072  }
073
074}