BUG-2138: Create DistributedShardFrontend
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / shardstrategy / DefaultShardStrategy.java
1 /*
2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6  * and is available at http://www.eclipse.org/legal/epl-v10.html
7  */
8
9 package org.opendaylight.controller.cluster.datastore.shardstrategy;
10
11 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
12
13 /**
14  * The DefaultShardStrategy basically puts all data into the default shard. The default shard stores data for all
15  * modules for which a specific set of shards has not been configured. This is only intended for testing.
16  */
17 public final class DefaultShardStrategy implements ShardStrategy {
18     public static final String NAME = "default";
19     public static final String DEFAULT_SHARD = "default";
20     private static final DefaultShardStrategy INSTANCE = new DefaultShardStrategy();
21
22     private DefaultShardStrategy() {
23         // Hidden to force a singleton instnace
24     }
25
26     public static DefaultShardStrategy getInstance() {
27         return INSTANCE;
28     }
29
30     @Override
31     public String findShard(YangInstanceIdentifier path) {
32         return DEFAULT_SHARD;
33     }
34
35     @Override
36     public YangInstanceIdentifier getPrefixForPath(YangInstanceIdentifier path) {
37         return YangInstanceIdentifier.EMPTY;
38     }
39 }

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