/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.chaos.actions;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy;
import org.apache.hadoop.hbase.regionserver.DisabledRegionSplitPolicy;
import org.apache.hadoop.hbase.regionserver.IncreasingToUpperBoundRegionSplitPolicy;
import java.util.Random;
public class ChangeSplitPolicyAction extends Action {
private final TableName tableName;
private final String[] possiblePolicies;
private final Random random;
public ChangeSplitPolicyAction(TableName tableName) {
this.tableName = tableName;
possiblePolicies = new String[] {
IncreasingToUpperBoundRegionSplitPolicy.class.getName(),
ConstantSizeRegionSplitPolicy.class.getName(),
DisabledRegionSplitPolicy.class.getName()
};
this.random = new Random();
}
@Override
public void perform() throws Exception {
HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
Admin admin = util.getAdmin();
LOG.info("Performing action: Change split policy of table " + tableName);
HTableDescriptor tableDescriptor = admin.getTableDescriptor(tableName);
String chosenPolicy = possiblePolicies[random.nextInt(possiblePolicies.length)];
tableDescriptor.setRegionSplitPolicyClassName(chosenPolicy);
LOG.info("Changing " + tableName + " split policy to " + chosenPolicy);
admin.modifyTable(tableName, tableDescriptor);
}
}