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.master.normalizer;
020
021import org.apache.hadoop.hbase.ScheduledChore;
022import org.apache.yetus.audience.InterfaceAudience;
023import org.slf4j.Logger;
024import org.slf4j.LoggerFactory;
025import org.apache.hadoop.hbase.master.HMaster;
026
027import java.io.IOException;
028
029/**
030 * Chore that will call {@link org.apache.hadoop.hbase.master.HMaster#normalizeRegions()}
031 * when needed.
032 */
033@InterfaceAudience.Private
034public class RegionNormalizerChore extends ScheduledChore {
035  private static final Logger LOG = LoggerFactory.getLogger(RegionNormalizerChore.class);
036
037  private final HMaster master;
038
039  public RegionNormalizerChore(HMaster master) {
040    super(master.getServerName() + "-RegionNormalizerChore", master,
041      master.getConfiguration().getInt("hbase.normalizer.period", 300000));
042    this.master = master;
043  }
044
045  @Override
046  protected void chore() {
047    try {
048      master.normalizeRegions();
049    } catch (IOException e) {
050      LOG.error("Failed to normalize regions.", e);
051    }
052  }
053}