Madan Jampani | 2546111 | 2015-02-17 14:17:29 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Madan Jampani | 0934270 | 2015-02-05 23:32:40 -0800 | [diff] [blame] | 17 | package org.onosproject.store.consistent.impl; |
| 18 | |
Madan Jampani | f1b8e17 | 2015-03-23 11:42:02 -0700 | [diff] [blame] | 19 | import java.util.List; |
Madan Jampani | 0934270 | 2015-02-05 23:32:40 -0800 | [diff] [blame] | 20 | |
| 21 | /** |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 22 | * A simple Partitioner that uses the map name hash to |
Madan Jampani | 0934270 | 2015-02-05 23:32:40 -0800 | [diff] [blame] | 23 | * pick a partition. |
| 24 | * <p> |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 25 | * This class uses a md5 hash based hashing scheme for hashing the map name to |
| 26 | * a partition. This partitioner maps all keys for a map to the same database |
Madan Jampani | 0934270 | 2015-02-05 23:32:40 -0800 | [diff] [blame] | 27 | * partition. |
| 28 | */ |
| 29 | public class SimpleTableHashPartitioner extends DatabasePartitioner { |
| 30 | |
Madan Jampani | f1b8e17 | 2015-03-23 11:42:02 -0700 | [diff] [blame] | 31 | public SimpleTableHashPartitioner(List<Database> partitions) { |
| 32 | super(partitions); |
Madan Jampani | 0934270 | 2015-02-05 23:32:40 -0800 | [diff] [blame] | 33 | } |
| 34 | |
| 35 | @Override |
Madan Jampani | 7804c99 | 2015-07-20 13:20:19 -0700 | [diff] [blame] | 36 | public Database getPartition(String mapName, String key) { |
| 37 | return partitions.get(hash(mapName) % partitions.size()); |
Madan Jampani | 0934270 | 2015-02-05 23:32:40 -0800 | [diff] [blame] | 38 | } |
Madan Jampani | bff6d8f | 2015-03-31 16:53:47 -0700 | [diff] [blame] | 39 | } |