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.List; 022 023import org.apache.hadoop.hbase.HBaseTestingUtility; 024import org.apache.hadoop.hbase.TableName; 025import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey; 026import org.apache.hadoop.hbase.client.Admin; 027import org.apache.hadoop.hbase.client.RegionInfo; 028import org.slf4j.Logger; 029import org.slf4j.LoggerFactory; 030 031/** 032* Action that tries to move a random region of a table. 033*/ 034public class MoveRandomRegionOfTableAction extends Action { 035 private static final Logger LOG = 036 LoggerFactory.getLogger(MoveRandomRegionOfTableAction.class); 037 private final long sleepTime; 038 private final TableName tableName; 039 040 public MoveRandomRegionOfTableAction(TableName tableName) { 041 this(-1, tableName); 042 } 043 044 public MoveRandomRegionOfTableAction(long sleepTime, TableName tableName) { 045 this.sleepTime = sleepTime; 046 this.tableName = tableName; 047 } 048 049 @Override 050 public void perform() throws Exception { 051 if (sleepTime > 0) { 052 Thread.sleep(sleepTime); 053 } 054 055 HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility(); 056 Admin admin = util.getAdmin(); 057 058 LOG.info("Performing action: Move random region of table " + tableName); 059 List<RegionInfo> regions = admin.getRegions(tableName); 060 if (regions == null || regions.isEmpty()) { 061 LOG.info("Table " + tableName + " doesn't have regions to move"); 062 return; 063 } 064 065 RegionInfo region = PolicyBasedChaosMonkey.selectRandomItem( 066 regions.toArray(new RegionInfo[regions.size()])); 067 LOG.debug("Move random region {}", region.getRegionNameAsString()); 068 // Use facility over in MoveRegionsOfTableAction... 069 MoveRegionsOfTableAction.moveRegion(admin, MoveRegionsOfTableAction.getServers(admin), region); 070 if (sleepTime > 0) { 071 Thread.sleep(sleepTime); 072 } 073 } 074}