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.chaos.actions;
019
020import java.util.Random;
021
022import org.apache.hadoop.hbase.HBaseTestingUtility;
023import org.apache.hadoop.hbase.TableName;
024import org.apache.hadoop.hbase.client.Admin;
025import org.apache.hadoop.hbase.client.TableDescriptor;
026import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
027import org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy;
028import org.apache.hadoop.hbase.regionserver.DisabledRegionSplitPolicy;
029import org.apache.hadoop.hbase.regionserver.IncreasingToUpperBoundRegionSplitPolicy;
030import org.slf4j.Logger;
031import org.slf4j.LoggerFactory;
032
033public class ChangeSplitPolicyAction extends Action {
034  private static final Logger LOG = LoggerFactory.getLogger(ChangeSplitPolicyAction.class);
035  private final TableName tableName;
036  private final String[] possiblePolicies;
037  private final Random random;
038
039  public ChangeSplitPolicyAction(TableName tableName) {
040    this.tableName = tableName;
041    possiblePolicies = new String[] {
042        IncreasingToUpperBoundRegionSplitPolicy.class.getName(),
043        ConstantSizeRegionSplitPolicy.class.getName(),
044        DisabledRegionSplitPolicy.class.getName()
045    };
046    this.random = new Random();
047  }
048
049
050  @Override
051  public void perform() throws Exception {
052    HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
053    Admin admin = util.getAdmin();
054
055    LOG.info("Performing action: Change split policy of table " + tableName);
056    TableDescriptor tableDescriptor = admin.getDescriptor(tableName);
057    TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(tableDescriptor);
058    String chosenPolicy = possiblePolicies[random.nextInt(possiblePolicies.length)];
059    builder.setRegionSplitPolicyClassName(chosenPolicy);
060    LOG.info("Changing "  + tableName + " split policy to " + chosenPolicy);
061    admin.modifyTable(builder.build());
062  }
063}