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 */ 018package org.apache.hadoop.hbase.executor; 019 020import org.apache.yetus.audience.InterfaceAudience; 021 022/** 023 * List of all HBase event handler types. 024 * <p> 025 * Event types are named by a convention: event type names specify the component from which the 026 * event originated and then where its destined -- e.g. RS_ZK_ prefix means the event came from a 027 * regionserver destined for zookeeper -- and then what the even is; e.g. REGION_OPENING. 028 * <p> 029 * We give the enums indices so we can add types later and keep them grouped together rather than 030 * have to add them always to the end as we would have to if we used raw enum ordinals. 031 */ 032@InterfaceAudience.Private 033public enum EventType { 034 // Messages originating from RS (NOTE: there is NO direct communication from 035 // RS to Master). These are a result of RS updates into ZK. 036 // RS_ZK_REGION_CLOSING (1), // It is replaced by M_ZK_REGION_CLOSING(HBASE-4739) 037 038 /** 039 * RS_ZK_REGION_CLOSED<br> 040 * 041 * RS has finished closing a region. 042 */ 043 RS_ZK_REGION_CLOSED (2, ExecutorType.MASTER_CLOSE_REGION), 044 /** 045 * RS_ZK_REGION_OPENING<br> 046 * 047 * RS is in process of opening a region. 048 */ 049 RS_ZK_REGION_OPENING (3, null), 050 /** 051 * RS_ZK_REGION_OPENED<br> 052 * 053 * RS has finished opening a region. 054 */ 055 RS_ZK_REGION_OPENED (4, ExecutorType.MASTER_OPEN_REGION), 056 /** 057 * RS_ZK_REGION_SPLITTING<br> 058 * 059 * RS has started a region split after master says it's ok to move on. 060 */ 061 RS_ZK_REGION_SPLITTING (5, null), 062 /** 063 * RS_ZK_REGION_SPLIT<br> 064 * 065 * RS split has completed and is notifying the master. 066 */ 067 RS_ZK_REGION_SPLIT (6, ExecutorType.MASTER_SERVER_OPERATIONS), 068 /** 069 * RS_ZK_REGION_FAILED_OPEN<br> 070 * 071 * RS failed to open a region. 072 */ 073 RS_ZK_REGION_FAILED_OPEN (7, ExecutorType.MASTER_CLOSE_REGION), 074 /** 075 * RS_ZK_REGION_MERGING<br> 076 * 077 * RS has started merging regions after master says it's ok to move on. 078 */ 079 RS_ZK_REGION_MERGING (8, null), 080 /** 081 * RS_ZK_REGION_MERGE<br> 082 * 083 * RS region merge has completed and is notifying the master. 084 */ 085 RS_ZK_REGION_MERGED (9, ExecutorType.MASTER_SERVER_OPERATIONS), 086 /** 087 * RS_ZK_REQUEST_REGION_SPLIT<br> 088 * 089 * RS has requested to split a region. This is to notify master 090 * and check with master if the region is in a state good to split. 091 */ 092 RS_ZK_REQUEST_REGION_SPLIT (10, null), 093 /** 094 * RS_ZK_REQUEST_REGION_MERGE<br> 095 * 096 * RS has requested to merge two regions. This is to notify master 097 * and check with master if two regions is in states good to merge. 098 */ 099 RS_ZK_REQUEST_REGION_MERGE (11, null), 100 101 /** 102 * Messages originating from Master to RS.<br> 103 * M_RS_OPEN_REGION<br> 104 * Master asking RS to open a region. 105 */ 106 M_RS_OPEN_REGION (20, ExecutorType.RS_OPEN_REGION), 107 /** 108 * Messages originating from Master to RS.<br> 109 * M_RS_OPEN_ROOT<br> 110 * Master asking RS to open root. 111 */ 112 M_RS_OPEN_ROOT (21, ExecutorType.RS_OPEN_ROOT), 113 /** 114 * Messages originating from Master to RS.<br> 115 * M_RS_OPEN_META<br> 116 * Master asking RS to open meta. 117 */ 118 M_RS_OPEN_META (22, ExecutorType.RS_OPEN_META), 119 /** 120 * Messages originating from Master to RS.<br> 121 * M_RS_CLOSE_REGION<br> 122 * Master asking RS to close a region. 123 */ 124 M_RS_CLOSE_REGION (23, ExecutorType.RS_CLOSE_REGION), 125 /** 126 * Messages originating from Master to RS.<br> 127 * M_RS_CLOSE_ROOT<br> 128 * Master asking RS to close root. 129 */ 130 M_RS_CLOSE_ROOT (24, ExecutorType.RS_CLOSE_ROOT), 131 /** 132 * Messages originating from Master to RS.<br> 133 * M_RS_CLOSE_META<br> 134 * Master asking RS to close meta. 135 */ 136 M_RS_CLOSE_META (25, ExecutorType.RS_CLOSE_META), 137 /** 138 * Messages originating from Master to RS.<br> 139 * M_RS_OPEN_PRIORITY_REGION<br> 140 * Master asking RS to open a priority region. 141 */ 142 M_RS_OPEN_PRIORITY_REGION (26, ExecutorType.RS_OPEN_PRIORITY_REGION), 143 144 /** 145 * Messages originating from Client to Master.<br> 146 * C_M_MERGE_REGION<br> 147 * Client asking Master to merge regions. 148 */ 149 C_M_MERGE_REGION (30, ExecutorType.MASTER_TABLE_OPERATIONS), 150 /** 151 * Messages originating from Client to Master.<br> 152 * C_M_DELETE_TABLE<br> 153 * Client asking Master to delete a table. 154 */ 155 C_M_DELETE_TABLE (40, ExecutorType.MASTER_TABLE_OPERATIONS), 156 /** 157 * Messages originating from Client to Master.<br> 158 * C_M_DISABLE_TABLE<br> 159 * Client asking Master to disable a table. 160 */ 161 C_M_DISABLE_TABLE (41, ExecutorType.MASTER_TABLE_OPERATIONS), 162 /** 163 * Messages originating from Client to Master.<br> 164 * C_M_ENABLE_TABLE<br> 165 * Client asking Master to enable a table. 166 */ 167 C_M_ENABLE_TABLE (42, ExecutorType.MASTER_TABLE_OPERATIONS), 168 /** 169 * Messages originating from Client to Master.<br> 170 * C_M_MODIFY_TABLE<br> 171 * Client asking Master to modify a table. 172 */ 173 C_M_MODIFY_TABLE (43, ExecutorType.MASTER_TABLE_OPERATIONS), 174 /** 175 * Messages originating from Client to Master.<br> 176 * C_M_ADD_FAMILY<br> 177 * Client asking Master to add family to table. 178 */ 179 C_M_ADD_FAMILY (44, null), 180 /** 181 * Messages originating from Client to Master.<br> 182 * C_M_DELETE_FAMILY<br> 183 * Client asking Master to delete family of table. 184 */ 185 C_M_DELETE_FAMILY (45, null), 186 /** 187 * Messages originating from Client to Master.<br> 188 * C_M_MODIFY_FAMILY<br> 189 * Client asking Master to modify family of table. 190 */ 191 C_M_MODIFY_FAMILY (46, null), 192 /** 193 * Messages originating from Client to Master.<br> 194 * C_M_CREATE_TABLE<br> 195 * Client asking Master to create a table. 196 */ 197 C_M_CREATE_TABLE (47, ExecutorType.MASTER_TABLE_OPERATIONS), 198 /** 199 * Messages originating from Client to Master.<br> 200 * C_M_SNAPSHOT_TABLE<br> 201 * Client asking Master to snapshot an offline table. 202 */ 203 C_M_SNAPSHOT_TABLE (48, ExecutorType.MASTER_SNAPSHOT_OPERATIONS), 204 /** 205 * Messages originating from Client to Master.<br> 206 * C_M_RESTORE_SNAPSHOT<br> 207 * Client asking Master to restore a snapshot. 208 */ 209 C_M_RESTORE_SNAPSHOT (49, ExecutorType.MASTER_SNAPSHOT_OPERATIONS), 210 211 // Updates from master to ZK. This is done by the master and there is 212 // nothing to process by either Master or RS 213 /** 214 * M_ZK_REGION_OFFLINE 215 * Master adds this region as offline in ZK 216 */ 217 M_ZK_REGION_OFFLINE (50, null), 218 /** 219 * M_ZK_REGION_CLOSING 220 * Master adds this region as closing in ZK 221 */ 222 M_ZK_REGION_CLOSING (51, null), 223 224 /** 225 * Master controlled events to be executed on the master 226 * M_SERVER_SHUTDOWN 227 * Master is processing shutdown of a RS 228 */ 229 M_SERVER_SHUTDOWN (70, ExecutorType.MASTER_SERVER_OPERATIONS), 230 /** 231 * Master controlled events to be executed on the master.<br> 232 * M_META_SERVER_SHUTDOWN <br> 233 * Master is processing shutdown of RS hosting a meta region (-ROOT- or hbase:meta). 234 */ 235 M_META_SERVER_SHUTDOWN (72, ExecutorType.MASTER_META_SERVER_OPERATIONS), 236 /** 237 * Master controlled events to be executed on the master.<br> 238 * 239 * M_MASTER_RECOVERY<br> 240 * Master is processing recovery of regions found in ZK RIT 241 */ 242 M_MASTER_RECOVERY (73, ExecutorType.MASTER_SERVER_OPERATIONS), 243 /** 244 * Master controlled events to be executed on the master.<br> 245 * 246 * M_LOG_REPLAY<br> 247 * Master is processing log replay of failed region server 248 */ 249 M_LOG_REPLAY (74, ExecutorType.M_LOG_REPLAY_OPS), 250 251 /** 252 * RS controlled events to be executed on the RS.<br> 253 * 254 * RS_PARALLEL_SEEK 255 */ 256 RS_PARALLEL_SEEK (80, ExecutorType.RS_PARALLEL_SEEK), 257 258 /** 259 * RS wal recovery work items (splitting wals) to be executed on the RS.<br> 260 * 261 * RS_LOG_REPLAY 262 */ 263 RS_LOG_REPLAY (81, ExecutorType.RS_LOG_REPLAY_OPS), 264 265 /** 266 * RS flush triggering from secondary region replicas to primary region replica. <br> 267 * 268 * RS_REGION_REPLICA_FLUSH 269 */ 270 RS_REGION_REPLICA_FLUSH (82, ExecutorType.RS_REGION_REPLICA_FLUSH_OPS), 271 272 /** 273 * RS compacted files discharger <br> 274 * 275 * RS_COMPACTED_FILES_DISCHARGER 276 */ 277 RS_COMPACTED_FILES_DISCHARGER (83, ExecutorType.RS_COMPACTED_FILES_DISCHARGER), 278 279 /** 280 * RS refresh peer.<br> 281 * 282 * RS_REFRESH_PEER 283 */ 284 RS_REFRESH_PEER (84, ExecutorType.RS_REFRESH_PEER); 285 286 private final int code; 287 private final ExecutorType executor; 288 289 /** 290 * Constructor 291 */ 292 EventType(final int code, final ExecutorType executor) { 293 this.code = code; 294 this.executor = executor; 295 } 296 297 public int getCode() { 298 return this.code; 299 } 300 301 public static EventType get(final int code) { 302 // Is this going to be slow? Its used rare but still... 303 for (EventType et : EventType.values()) { 304 if (et.getCode() == code) { 305 return et; 306 } 307 } 308 throw new IllegalArgumentException("Unknown code " + code); 309 } 310 311 ExecutorType getExecutorServiceType() { 312 return this.executor; 313 } 314}