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.io.IOException; 022import java.util.Random; 023 024import org.apache.hadoop.hbase.TableName; 025import org.slf4j.Logger; 026import org.slf4j.LoggerFactory; 027 028/** 029 * Action that changes the number of versions on a column family from a list of tables. 030 * 031 * Always keeps at least 1 as the number of versions. 032 */ 033public class ChangeVersionsAction extends Action { 034 private final TableName tableName; 035 private static final Logger LOG = LoggerFactory.getLogger(ChangeVersionsAction.class); 036 037 private Random random; 038 039 public ChangeVersionsAction(TableName tableName) { 040 this.tableName = tableName; 041 this.random = new Random(); 042 } 043 044 @Override 045 public void perform() throws IOException { 046 final int versions = random.nextInt(3) + 1; 047 048 LOG.debug("Performing action: Changing versions on " + tableName + " to " + versions); 049 modifyAllTableColumns(tableName, columnBuilder -> { 050 columnBuilder.setMinVersions(versions).setMaxVersions(versions); 051 }); 052 LOG.debug("Performing action: Just changed versions on " + tableName); 053 } 054}