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 */
018
019package org.apache.hadoop.hbase.chaos.actions;
020
021import java.util.Random;
022
023import org.apache.hadoop.hbase.HBaseTestingUtility;
024import org.apache.hadoop.hbase.TableName;
025import org.apache.hadoop.hbase.client.Admin;
026import org.slf4j.Logger;
027import org.slf4j.LoggerFactory;
028
029/**
030 * Action that tries to truncate of a table.
031 */
032public class TruncateTableAction extends Action {
033  private static final Logger LOG =
034      LoggerFactory.getLogger(TruncateTableAction.class);
035  private final TableName tableName;
036  private final Random random;
037
038  public TruncateTableAction(String tableName) {
039    this.tableName = TableName.valueOf(tableName);
040    this.random = new Random();
041  }
042
043  @Override
044  public void perform() throws Exception {
045    HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
046    Admin admin = util.getAdmin();
047
048    // Don't try the truncate if we're stopping
049    if (context.isStopping()) {
050      return;
051    }
052
053    boolean preserveSplits = random.nextBoolean();
054    LOG.info("Performing action: Truncate table " + tableName.getNameAsString() +
055             "preserve splits " + preserveSplits);
056    admin.truncateTable(tableName, preserveSplits);
057  }
058}