X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FDataChangeListenerRegistrationProxy.java;h=06f3afc57cb19d13dfd75448ce59dcf1a1e6bf39;hp=e3cdbb4ee131d1b0961e9d57c8eeb5ee6e568b61;hb=9f19da6634f18ab4d55ca1def76566ca63416ff0;hpb=11e9ade9af527aba7faeb633d3c9c7552fd09d2d

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java
index e3cdbb4ee1..06f3afc57c 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java
@@ -11,11 +11,22 @@ package org.opendaylight.controller.cluster.datastore;
 import akka.actor.ActorRef;
 import akka.actor.ActorSelection;
 import akka.actor.PoisonPill;
+import akka.dispatch.OnComplete;
+import org.opendaylight.controller.cluster.datastore.exceptions.LocalShardNotFoundException;
 import org.opendaylight.controller.cluster.datastore.messages.CloseDataChangeListenerRegistration;
+import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
+import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
+import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
 import org.opendaylight.yangtools.concepts.ListenerRegistration;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import com.google.common.annotations.VisibleForTesting;
+import scala.concurrent.Future;
 
 /**
  * ListenerRegistrationProxy acts as a proxy for a ListenerRegistration that was done on a remote shard
@@ -24,18 +35,34 @@ import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  * The ListenerRegistrationProxy talks to a remote ListenerRegistration actor.
  * </p>
  */
+@SuppressWarnings("rawtypes")
 public class DataChangeListenerRegistrationProxy implements ListenerRegistration {
-    private final ActorSelection listenerRegistrationActor;
-    private final AsyncDataChangeListener listener;
-    private final ActorRef dataChangeListenerActor;
+
+    private static final Logger LOG = LoggerFactory.getLogger(DataChangeListenerRegistrationProxy.class);
+
+    private volatile ActorSelection listenerRegistrationActor;
+    private final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
+    private ActorRef dataChangeListenerActor;
+    private final String shardName;
+    private final ActorContext actorContext;
+    private boolean closed = false;
 
     public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
-    DataChangeListenerRegistrationProxy(
-        ActorSelection listenerRegistrationActor,
-        L listener, ActorRef dataChangeListenerActor) {
-        this.listenerRegistrationActor = listenerRegistrationActor;
+                                                              DataChangeListenerRegistrationProxy (
+            String shardName, ActorContext actorContext, L listener) {
+        this.shardName = shardName;
+        this.actorContext = actorContext;
         this.listener = listener;
-        this.dataChangeListenerActor = dataChangeListenerActor;
+    }
+
+    @VisibleForTesting
+    ActorSelection getListenerRegistrationActor() {
+        return listenerRegistrationActor;
+    }
+
+    @VisibleForTesting
+    ActorRef getDataChangeListenerActor() {
+        return dataChangeListenerActor;
     }
 
     @Override
@@ -43,9 +70,88 @@ public class DataChangeListenerRegistrationProxy implements ListenerRegistration
         return listener;
     }
 
+    private void setListenerRegistrationActor(ActorSelection listenerRegistrationActor) {
+        if(listenerRegistrationActor == null) {
+            return;
+        }
+
+        boolean sendCloseMessage = false;
+        synchronized(this) {
+            if(closed) {
+                sendCloseMessage = true;
+            } else {
+                this.listenerRegistrationActor = listenerRegistrationActor;
+            }
+        }
+
+        if(sendCloseMessage) {
+            listenerRegistrationActor.tell(new
+                CloseDataChangeListenerRegistration().toSerializable(), null);
+        }
+    }
+
+    public void init(final YangInstanceIdentifier path, final AsyncDataBroker.DataChangeScope scope) {
+
+        dataChangeListenerActor = actorContext.getActorSystem().actorOf(
+                DataChangeListener.props(listener));
+
+        Future<ActorRef> findFuture = actorContext.findLocalShardAsync(shardName);
+        findFuture.onComplete(new OnComplete<ActorRef>() {
+            @Override
+            public void onComplete(Throwable failure, ActorRef shard) {
+                if(failure instanceof LocalShardNotFoundException) {
+                    LOG.debug("No local shard found for {} - DataChangeListener {} at path {} " +
+                            "cannot be registered", shardName, listener, path);
+                } else if(failure != null) {
+                    LOG.error("Failed to find local shard {} - DataChangeListener {} at path {} " +
+                            "cannot be registered: {}", shardName, listener, path, failure);
+                } else {
+                    doRegistration(shard, path, scope);
+                }
+            }
+        }, actorContext.getActorSystem().dispatcher());
+    }
+
+    private void doRegistration(ActorRef shard, final YangInstanceIdentifier path,
+            DataChangeScope scope) {
+
+        Future<Object> future = actorContext.executeOperationAsync(shard,
+                new RegisterChangeListener(path, dataChangeListenerActor.path(), scope),
+                actorContext.getDatastoreContext().getShardInitializationTimeout());
+
+        future.onComplete(new OnComplete<Object>(){
+            @Override
+            public void onComplete(Throwable failure, Object result) {
+                if(failure != null) {
+                    LOG.error("Failed to register DataChangeListener {} at path {}",
+                            listener, path.toString(), failure);
+                } else {
+                    RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
+                    setListenerRegistrationActor(actorContext.actorSelection(
+                            reply.getListenerRegistrationPath()));
+                }
+            }
+        }, actorContext.getActorSystem().dispatcher());
+    }
+
     @Override
     public void close() {
-        listenerRegistrationActor.tell(new CloseDataChangeListenerRegistration().toSerializable(), null);
-        dataChangeListenerActor.tell(PoisonPill.getInstance(), null);
+
+        boolean sendCloseMessage;
+        synchronized(this) {
+            sendCloseMessage = !closed && listenerRegistrationActor != null;
+            closed = true;
+        }
+
+        if(sendCloseMessage) {
+            listenerRegistrationActor.tell(new CloseDataChangeListenerRegistration().toSerializable(),
+                    ActorRef.noSender());
+            listenerRegistrationActor = null;
+        }
+
+        if(dataChangeListenerActor != null) {
+            dataChangeListenerActor.tell(PoisonPill.getInstance(), ActorRef.noSender());
+            dataChangeListenerActor = null;
+        }
     }
 }