1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.coordination;
19
20 import org.apache.hadoop.hbase.classification.InterfaceAudience;
21 import org.apache.hadoop.hbase.CoordinatedStateException;
22 import org.apache.hadoop.hbase.CoordinatedStateManager;
23 import org.apache.hadoop.hbase.Server;
24 import org.apache.hadoop.hbase.TableStateManager;
25
26 /**
27 * Base class for {@link org.apache.hadoop.hbase.CoordinatedStateManager} implementations.
28 * Defines methods to retrieve coordination objects for relevant areas. CoordinatedStateManager
29 * reference returned from Server interface has to be casted to this type to
30 * access those methods.
31 */
32 @InterfaceAudience.Private
33 public abstract class BaseCoordinatedStateManager implements CoordinatedStateManager {
34
35 @Override
36 public void initialize(Server server) {
37 }
38
39 @Override
40 public void start() {
41 }
42
43 @Override
44 public void stop() {
45 }
46
47 @Override
48 public Server getServer() {
49 return null;
50 }
51
52 @Override
53 public abstract TableStateManager getTableStateManager() throws InterruptedException,
54 CoordinatedStateException;
55 /**
56 * Method to retrieve coordination for split log worker
57 */
58 public abstract SplitLogWorkerCoordination getSplitLogWorkerCoordination();
59 /**
60 * Method to retrieve coordination for split log manager
61 */
62 public abstract SplitLogManagerCoordination getSplitLogManagerCoordination();
63 /**
64 * Method to retrieve coordination for split transaction.
65 */
66 abstract public SplitTransactionCoordination getSplitTransactionCoordination();
67
68 /**
69 * Method to retrieve coordination for closing region operations.
70 */
71 public abstract CloseRegionCoordination getCloseRegionCoordination();
72
73 /**
74 * Method to retrieve coordination for opening region operations.
75 */
76 public abstract OpenRegionCoordination getOpenRegionCoordination();
77
78 /**
79 * Method to retrieve coordination for region merge transaction
80 */
81 public abstract RegionMergeCoordination getRegionMergeCoordination();
82 }