/**
* 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 java.io.IOException;
import java.util.Random;
import java.util.Set;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.util.Bytes;
/**
* Action that removes a column family.
*/
public class RemoveColumnAction extends Action {
private final TableName tableName;
private final Set<String> protectedColumns;
private Admin admin;
private Random random;
public RemoveColumnAction(TableName tableName, Set<String> protectedColumns) {
this.tableName = tableName;
this.protectedColumns = protectedColumns;
random = new Random();
}
@Override
public void init(ActionContext context) throws IOException {
super.init(context);
this.admin = context.getHBaseIntegrationTestingUtility().getAdmin();
}
@Override
public void perform() throws Exception {
HTableDescriptor tableDescriptor = admin.getTableDescriptor(tableName);
HColumnDescriptor[] columnDescriptors = tableDescriptor.getColumnFamilies();
if (columnDescriptors.length <= (protectedColumns == null ? 1 : protectedColumns.size())) {
return;
}
int index = random.nextInt(columnDescriptors.length);
while(protectedColumns != null &&
protectedColumns.contains(columnDescriptors[index].getNameAsString())) {
index = random.nextInt(columnDescriptors.length);
}
byte[] colDescName = columnDescriptors[index].getName();
LOG.debug("Performing action: Removing " + Bytes.toString(colDescName)+ " from "
+ tableName.getNameAsString());
tableDescriptor.removeFamily(colDescName);
// Don't try the modify if we're stopping
if (context.isStopping()) {
return;
}
admin.modifyTable(tableName, tableDescriptor);
}
}