/**
*
* 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.executor;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* List of all HBase event handler types. Event types are named by a
* convention: event type names specify the component from which the event
* originated and then where its destined -- e.g. RS2ZK_ prefix means the
* event came from a regionserver destined for zookeeper -- and then what
* the even is; e.g. REGION_OPENING.
*
* <p>We give the enums indices so we can add types later and keep them
* grouped together rather than have to add them always to the end as we
* would have to if we used raw enum ordinals.
*/
@InterfaceAudience.Private
public enum EventType {
// Messages originating from RS (NOTE: there is NO direct communication from
// RS to Master). These are a result of RS updates into ZK.
// RS_ZK_REGION_CLOSING (1), // It is replaced by M_ZK_REGION_CLOSING(HBASE-4739)
/**
* RS_ZK_REGION_CLOSED<br>
*
* RS has finished closing a region.
*/
RS_ZK_REGION_CLOSED (2, ExecutorType.MASTER_CLOSE_REGION),
/**
* RS_ZK_REGION_OPENING<br>
*
* RS is in process of opening a region.
*/
RS_ZK_REGION_OPENING (3, null),
/**
* RS_ZK_REGION_OPENED<br>
*
* RS has finished opening a region.
*/
RS_ZK_REGION_OPENED (4, ExecutorType.MASTER_OPEN_REGION),
/**
* RS_ZK_REGION_SPLITTING<br>
*
* RS has started a region split after master says it's ok to move on.
*/
RS_ZK_REGION_SPLITTING (5, null),
/**
* RS_ZK_REGION_SPLIT<br>
*
* RS split has completed and is notifying the master.
*/
RS_ZK_REGION_SPLIT (6, ExecutorType.MASTER_SERVER_OPERATIONS),
/**
* RS_ZK_REGION_FAILED_OPEN<br>
*
* RS failed to open a region.
*/
RS_ZK_REGION_FAILED_OPEN (7, ExecutorType.MASTER_CLOSE_REGION),
/**
* RS_ZK_REGION_MERGING<br>
*
* RS has started merging regions after master says it's ok to move on.
*/
RS_ZK_REGION_MERGING (8, null),
/**
* RS_ZK_REGION_MERGE<br>
*
* RS region merge has completed and is notifying the master.
*/
RS_ZK_REGION_MERGED (9, ExecutorType.MASTER_SERVER_OPERATIONS),
/**
* RS_ZK_REQUEST_REGION_SPLIT<br>
*
* RS has requested to split a region. This is to notify master
* and check with master if the region is in a state good to split.
*/
RS_ZK_REQUEST_REGION_SPLIT (10, null),
/**
* RS_ZK_REQUEST_REGION_MERGE<br>
*
* RS has requested to merge two regions. This is to notify master
* and check with master if two regions is in states good to merge.
*/
RS_ZK_REQUEST_REGION_MERGE (11, null),
/**
* Messages originating from Master to RS.<br>
* M_RS_OPEN_REGION<br>
* Master asking RS to open a region.
*/
M_RS_OPEN_REGION (20, ExecutorType.RS_OPEN_REGION),
/**
* Messages originating from Master to RS.<br>
* M_RS_OPEN_ROOT<br>
* Master asking RS to open root.
*/
M_RS_OPEN_ROOT (21, ExecutorType.RS_OPEN_ROOT),
/**
* Messages originating from Master to RS.<br>
* M_RS_OPEN_META<br>
* Master asking RS to open meta.
*/
M_RS_OPEN_META (22, ExecutorType.RS_OPEN_META),
/**
* Messages originating from Master to RS.<br>
* M_RS_CLOSE_REGION<br>
* Master asking RS to close a region.
*/
M_RS_CLOSE_REGION (23, ExecutorType.RS_CLOSE_REGION),
/**
* Messages originating from Master to RS.<br>
* M_RS_CLOSE_ROOT<br>
* Master asking RS to close root.
*/
M_RS_CLOSE_ROOT (24, ExecutorType.RS_CLOSE_ROOT),
/**
* Messages originating from Master to RS.<br>
* M_RS_CLOSE_META<br>
* Master asking RS to close meta.
*/
M_RS_CLOSE_META (25, ExecutorType.RS_CLOSE_META),
/**
* Messages originating from Master to RS.<br>
* M_RS_OPEN_PRIORITY_REGION<br>
* Master asking RS to open a priority region.
*/
M_RS_OPEN_PRIORITY_REGION (26, ExecutorType.RS_OPEN_PRIORITY_REGION),
/**
* Messages originating from Client to Master.<br>
* C_M_MERGE_REGION<br>
* Client asking Master to merge regions.
*/
C_M_MERGE_REGION (30, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_DELETE_TABLE<br>
* Client asking Master to delete a table.
*/
C_M_DELETE_TABLE (40, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_DISABLE_TABLE<br>
* Client asking Master to disable a table.
*/
C_M_DISABLE_TABLE (41, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_ENABLE_TABLE<br>
* Client asking Master to enable a table.
*/
C_M_ENABLE_TABLE (42, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_MODIFY_TABLE<br>
* Client asking Master to modify a table.
*/
C_M_MODIFY_TABLE (43, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_ADD_FAMILY<br>
* Client asking Master to add family to table.
*/
C_M_ADD_FAMILY (44, null),
/**
* Messages originating from Client to Master.<br>
* C_M_DELETE_FAMILY<br>
* Client asking Master to delete family of table.
*/
C_M_DELETE_FAMILY (45, null),
/**
* Messages originating from Client to Master.<br>
* C_M_MODIFY_FAMILY<br>
* Client asking Master to modify family of table.
*/
C_M_MODIFY_FAMILY (46, null),
/**
* Messages originating from Client to Master.<br>
* C_M_CREATE_TABLE<br>
* Client asking Master to create a table.
*/
C_M_CREATE_TABLE (47, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_SNAPSHOT_TABLE<br>
* Client asking Master to snapshot an offline table.
*/
C_M_SNAPSHOT_TABLE (48, ExecutorType.MASTER_TABLE_OPERATIONS),
/**
* Messages originating from Client to Master.<br>
* C_M_RESTORE_SNAPSHOT<br>
* Client asking Master to restore a snapshot.
*/
C_M_RESTORE_SNAPSHOT (49, ExecutorType.MASTER_TABLE_OPERATIONS),
// Updates from master to ZK. This is done by the master and there is
// nothing to process by either Master or RS
/**
* M_ZK_REGION_OFFLINE
* Master adds this region as offline in ZK
*/
M_ZK_REGION_OFFLINE (50, null),
/**
* M_ZK_REGION_CLOSING
* Master adds this region as closing in ZK
*/
M_ZK_REGION_CLOSING (51, null),
/**
* Master controlled events to be executed on the master
* M_SERVER_SHUTDOWN
* Master is processing shutdown of a RS
*/
M_SERVER_SHUTDOWN (70, ExecutorType.MASTER_SERVER_OPERATIONS),
/**
* Master controlled events to be executed on the master.<br>
* M_META_SERVER_SHUTDOWN <br>
* Master is processing shutdown of RS hosting a meta region (-ROOT- or hbase:meta).
*/
M_META_SERVER_SHUTDOWN (72, ExecutorType.MASTER_META_SERVER_OPERATIONS),
/**
* Master controlled events to be executed on the master.<br>
*
* M_MASTER_RECOVERY<br>
* Master is processing recovery of regions found in ZK RIT
*/
M_MASTER_RECOVERY (73, ExecutorType.MASTER_SERVER_OPERATIONS),
/**
* Master controlled events to be executed on the master.<br>
*
* M_LOG_REPLAY<br>
* Master is processing log replay of failed region server
*/
M_LOG_REPLAY (74, ExecutorType.M_LOG_REPLAY_OPS),
/**
* RS controlled events to be executed on the RS.<br>
*
* RS_PARALLEL_SEEK
*/
RS_PARALLEL_SEEK (80, ExecutorType.RS_PARALLEL_SEEK),
/**
* RS wal recovery work items(either creating recover.edits or directly replay wals)
* to be executed on the RS.<br>
*
* RS_LOG_REPLAY
*/
RS_LOG_REPLAY (81, ExecutorType.RS_LOG_REPLAY_OPS),
/**
* RS flush triggering from secondary region replicas to primary region replica. <br>
*
* RS_REGION_REPLICA_FLUSH
*/
RS_REGION_REPLICA_FLUSH (82, ExecutorType.RS_REGION_REPLICA_FLUSH_OPS),
/**
* RS compacted files discharger <br>
*
* RS_COMPACTED_FILES_DISCHARGER
*/
RS_COMPACTED_FILES_DISCHARGER (83, ExecutorType.RS_COMPACTED_FILES_DISCHARGER);
private final int code;
private final ExecutorType executor;
/**
* Constructor
*/
EventType(final int code, final ExecutorType executor) {
this.code = code;
this.executor = executor;
}
public int getCode() {
return this.code;
}
public static EventType get(final int code) {
// Is this going to be slow? Its used rare but still...
for (EventType et: EventType.values()) {
if (et.getCode() == code) return et;
}
throw new IllegalArgumentException("Unknown code " + code);
}
public boolean isOnlineSchemaChangeSupported() {
return (
this.equals(EventType.C_M_ADD_FAMILY) ||
this.equals(EventType.C_M_DELETE_FAMILY) ||
this.equals(EventType.C_M_MODIFY_FAMILY) ||
this.equals(EventType.C_M_MODIFY_TABLE)
);
}
ExecutorType getExecutorServiceType() {
return this.executor;
}
}