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 org.apache.hadoop.conf.Configuration;
022import org.apache.yetus.audience.InterfaceAudience;
023
024/**
025 * Basic strategy chooses between two actions: flattening a segment or merging indices of all
026 * segments in the pipeline.
027 * If number of segments in pipeline exceed the limit defined in MemStoreCompactionStrategy then
028 * apply merge, otherwise flatten some segment.
029 */
030@InterfaceAudience.Private
031public class BasicMemStoreCompactionStrategy extends MemStoreCompactionStrategy{
032  private static final String NAME = "BASIC";
033
034  public BasicMemStoreCompactionStrategy(Configuration conf, String cfName) {
035    super(conf, cfName);
036  }
037
038  @Override
039  public Action getAction(VersionedSegmentsList versionedList) {
040    return simpleMergeOrFlatten(versionedList, getName());
041  }
042
043  @Override
044  protected String getName() {
045    return NAME;
046  }
047}