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.mob;
019
020import java.io.IOException;
021import org.apache.hadoop.conf.Configuration;
022import org.apache.hadoop.hbase.regionserver.DefaultStoreEngine;
023import org.apache.hadoop.hbase.regionserver.HStore;
024import org.apache.hadoop.hbase.util.ReflectionUtils;
025import org.apache.yetus.audience.InterfaceAudience;
026
027/**
028 * MobStoreEngine creates the mob specific compactor, and store flusher.
029 */
030@InterfaceAudience.Private
031public class MobStoreEngine extends DefaultStoreEngine {
032  public final static String MOB_COMPACTOR_CLASS_KEY = "hbase.hstore.mobengine.compactor.class";
033
034  @Override
035  protected void createStoreFlusher(Configuration conf, HStore store) throws IOException {
036    // When using MOB, we use DefaultMobStoreFlusher always
037    // Just use the compactor and compaction policy as that in DefaultStoreEngine. We can have MOB
038    // specific compactor and policy when that is implemented.
039    storeFlusher = new DefaultMobStoreFlusher(conf, store);
040  }
041
042  /**
043   * Creates the DefaultMobCompactor.
044   */
045  @Override
046  protected void createCompactor(Configuration conf, HStore store) throws IOException {
047    String className = conf.get(MOB_COMPACTOR_CLASS_KEY, DefaultMobStoreCompactor.class.getName());
048    try {
049      compactor = ReflectionUtils.instantiateWithCustomCtor(className,
050        new Class[] { Configuration.class, HStore.class }, new Object[] { conf, store });
051    } catch (RuntimeException e) {
052      throw new IOException("Unable to load configured compactor '" + className + "'", e);
053    }
054  }
055}