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;
022import org.apache.hadoop.hbase.HBaseTestingUtility;
023import org.apache.hadoop.hbase.TableName;
024import org.apache.hadoop.hbase.client.Admin;
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027
028/**
029 * Action that tries to truncate of a table.
030 */
031public class TruncateTableAction extends Action {
032  private static final Logger LOG = LoggerFactory.getLogger(TruncateTableAction.class);
033  private final TableName tableName;
034  private final Random random;
035
036  public TruncateTableAction(String tableName) {
037    this.tableName = TableName.valueOf(tableName);
038    this.random = new Random();
039  }
040
041  @Override protected Logger getLogger() {
042    return LOG;
043  }
044
045  @Override
046  public void perform() throws Exception {
047    HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
048    Admin admin = util.getAdmin();
049
050    // Don't try the truncate if we're stopping
051    if (context.isStopping()) {
052      return;
053    }
054
055    boolean preserveSplits = random.nextBoolean();
056    getLogger().info("Performing action: Truncate table {} preserve splits {}",
057      tableName.getNameAsString(), preserveSplits);
058    admin.truncateTable(tableName, preserveSplits);
059  }
060}