Keep DataChange registrations and notifications local

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
index 46f09217d04a3119f97b4ae25b66737a22690caa..23e27c9f5ff909b2c9b887aa5f7687b92d7cda10 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
@@ -27,6 +27,7 @@ import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChain;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChainReply;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
 import org.opendaylight.controller.cluster.datastore.messages.ForwardedCommitTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.PeerAddressResolved;
 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
@@ -44,7 +45,9 @@ import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
@@ -80,6 +83,8 @@ public class Shard extends RaftActor {
 
     private final ShardStats shardMBean;
 
+    private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
+
     private Shard(String name, Map<String, String> peerAddresses) {
         super(name, peerAddresses);
 
@@ -228,6 +233,16 @@ public class Shard extends RaftActor {
             .system().actorSelection(
                 registerChangeListener.getDataChangeListenerPath());
 
+
+        // Notify the listener if notifications should be enabled or not
+        // If this shard is the leader then it will enable notifications else
+        // it will not
+        dataChangeListenerPath.tell(new EnableNotification(isLeader()), getSelf());
+
+        // Now store a reference to the data change listener so it can be notified
+        // at a later point if notifications should be enabled or disabled
+        dataChangeListeners.add(dataChangeListenerPath);
+
         AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>
             listener = new DataChangeListenerProxy(schemaContext,dataChangeListenerPath);
 
@@ -285,6 +300,12 @@ public class Shard extends RaftActor {
         throw new UnsupportedOperationException("applySnapshot");
     }
 
+    @Override protected void onStateChanged() {
+        for(ActorSelection dataChangeListener : dataChangeListeners){
+            dataChangeListener.tell(new EnableNotification(isLeader()), getSelf());
+        }
+    }
+
     @Override public String persistenceId() {
         return this.name;
     }