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