Migrate from YangInstanceIdentifier.EMPTY

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / shardstrategy / DefaultShardStrategy.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/DefaultShardStrategy.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/DefaultShardStrategy.java
index a8ab5c4bd390ea3567613b8a9075c1cd430b0066..7e37b10e774dd9373be17c247f354c651fb18b45 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/DefaultShardStrategy.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardstrategy/DefaultShardStrategy.java
@@ -8,21 +8,32 @@
 
 package org.opendaylight.controller.cluster.datastore.shardstrategy;
 
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 
 /**
- * The DefaultShardStrategy basically puts all data into the default Shard
- * <p>
- *   The default shard stores data for all modules for which a specific set of shards has not been configured
- * </p>
+ * The DefaultShardStrategy basically puts all data into the default shard. The default shard stores data for all
+ * modules for which a specific set of shards has not been configured. This is only intended for testing.
  */
-public class DefaultShardStrategy implements ShardStrategy{
+public final class DefaultShardStrategy implements ShardStrategy {
+    public static final String NAME = "default";
+    public static final String DEFAULT_SHARD = "default";
+    private static final DefaultShardStrategy INSTANCE = new DefaultShardStrategy();
 
-  public static final String NAME = "default";
-  public static final String DEFAULT_SHARD = "default";
+    private DefaultShardStrategy() {
+        // Hidden to force a singleton instnace
+    }
 
-  @Override
-  public String findShard(InstanceIdentifier path) {
-    return DEFAULT_SHARD;
-  }
+    public static DefaultShardStrategy getInstance() {
+        return INSTANCE;
+    }
+
+    @Override
+    public String findShard(YangInstanceIdentifier path) {
+        return DEFAULT_SHARD;
+    }
+
+    @Override
+    public YangInstanceIdentifier getPrefixForPath(YangInstanceIdentifier path) {
+        return YangInstanceIdentifier.empty();
+    }
 }