Keep DataChange registrations and notifications local

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/ActorContext.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/ActorContext.java
index ac0893da5ad157c230fad2aab7401b27d0054751..4706c66e2594eae1384b465bf5d0b246c72d8223 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/ActorContext.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/ActorContext.java
@@ -18,7 +18,9 @@ import org.opendaylight.controller.cluster.datastore.ClusterWrapper;
 import org.opendaylight.controller.cluster.datastore.Configuration;
 import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
 import org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException;
+import org.opendaylight.controller.cluster.datastore.messages.FindLocalShard;
 import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
+import org.opendaylight.controller.cluster.datastore.messages.LocalShardFound;
 import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 import org.slf4j.Logger;
@@ -91,6 +93,29 @@ public class ActorContext {
         return actorSystem.actorSelection(path);
     }
 
+    /**
+     * Finds a local shard given it's shard name and return it's ActorRef
+     *
+     * @param shardName the name of the local shard that needs to be found
+     * @return a reference to a local shard actor which represents the shard
+     *         specified by the shardName
+     */
+    public ActorRef findLocalShard(String shardName) {
+        Object result = executeLocalOperation(shardManager,
+            new FindLocalShard(shardName), ASK_DURATION);
+
+        if (result instanceof LocalShardFound) {
+            LocalShardFound found = (LocalShardFound) result;
+
+            LOG.debug("Local shard found {}", found.getPath());
+
+            return found.getPath();
+        }
+
+        return null;
+    }
+
+
     public String findPrimaryPath(String shardName) {
         Object result = executeLocalOperation(shardManager,
             new FindPrimary(shardName).toSerializable(), ASK_DURATION);
@@ -170,6 +195,34 @@ public class ActorContext {
         return executeRemoteOperation(primary, message, duration);
     }
 
+    /**
+     * Execute an operation on the the local shard only
+     * <p>
+     *     This method first finds the address of the local shard if any. It then
+     *     executes the operation on it.
+     * </p>
+     *
+     * @param shardName the name of the shard on which the operation needs to be executed
+     * @param message the message that needs to be sent to the shard
+     * @param duration the time duration in which this operation should complete
+     * @return the message that was returned by the local actor on which the
+     *         the operation was executed. If a local shard was not found then
+     *         null is returned
+     * @throws org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException
+     *         if the operation does not complete in a specified time duration
+     */
+    public Object executeLocalShardOperation(String shardName, Object message,
+        FiniteDuration duration) {
+        ActorRef local = findLocalShard(shardName);
+
+        if(local != null) {
+            return executeLocalOperation(local, message, duration);
+        }
+
+        return null;
+    }
+
+
     public void shutdown() {
         shardManager.tell(PoisonPill.getInstance(), null);
         actorSystem.shutdown();