/*
    * 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.util.Random;
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.client.Admin;
  import org.apache.hadoop.hbase.client.HBaseAdmin;
  import org.apache.hadoop.hbase.TableName;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Action that tries to truncate of a table.
   */
  public class TruncateTableAction extends Action {
    private static final Logger LOG = LoggerFactory.getLogger(TruncateTableAction.class);
    private final TableName tableName;
    private final Random random;
  
    public TruncateTableAction(String tableName) {
      this.tableName = TableName.valueOf(tableName);
      this.random = new Random();
    }
  
    @Override protected Logger getLogger() {
      return LOG;
    }
  
    @Override
    public void perform() throws Exception {
      HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
      Admin admin = util.getHBaseAdmin();
  
      // Don't try the truncate if we're stopping
      if (context.isStopping()) {
        return;
      }
  
      boolean preserveSplits = random.nextBoolean();
      getLogger().info("Performing action: Truncate table {} preserve splits {}",
        tableName.getNameAsString(), preserveSplits);
      admin.truncateTable(tableName, preserveSplits);
    }
  }