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.apache.hadoop.hbase.io.encoding.DataBlockEncoding; 026import org.slf4j.Logger; 027import org.slf4j.LoggerFactory; 028 029/** 030 * Action that changes the encoding on a column family from a list of tables. 031 */ 032public class ChangeEncodingAction extends Action { 033 private final TableName tableName; 034 private final Random random; 035 private static final Logger LOG = LoggerFactory.getLogger(ChangeEncodingAction.class); 036 037 public ChangeEncodingAction(TableName tableName) { 038 this.tableName = tableName; 039 this.random = new Random(); 040 } 041 042 @Override 043 public void perform() throws IOException { 044 LOG.debug("Performing action: Changing encodings on " + tableName); 045 // possible DataBlockEncoding id's 046 final int[] possibleIds = {0, 2, 3, 4, 6}; 047 048 modifyAllTableColumns(tableName, (columnName, columnBuilder) -> { 049 short id = (short) possibleIds[random.nextInt(possibleIds.length)]; 050 DataBlockEncoding encoding = DataBlockEncoding.getEncodingById(id); 051 columnBuilder.setDataBlockEncoding(encoding); 052 LOG.debug("Set encoding of column family " + columnName + " to: " + encoding); 053 }); 054 } 055}