Refactor Register*ListenerReply classes

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerSupport.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerSupport.java
index db5eeb83e70eedd4101cceeabd5491a2c5b3a47e..8dba00547f6926d554f7a753a56d9c0a4869d018 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerSupport.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerSupport.java
@@ -9,92 +9,34 @@ package org.opendaylight.controller.cluster.datastore;
 
 import akka.actor.ActorRef;
 import akka.actor.ActorSelection;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Map.Entry;
-import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
+import org.opendaylight.controller.cluster.datastore.actors.DataTreeNotificationListenerRegistrationActor;
 import org.opendaylight.controller.cluster.datastore.messages.RegisterDataTreeChangeListener;
-import org.opendaylight.controller.cluster.datastore.messages.RegisterDataTreeChangeListenerReply;
 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
-import org.opendaylight.yangtools.concepts.ListenerRegistration;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
-final class DataTreeChangeListenerSupport extends LeaderLocalDelegateFactory<RegisterDataTreeChangeListener, ListenerRegistration<DOMDataTreeChangeListener>, DataTreeCandidate> {
-    private static final Logger LOG = LoggerFactory.getLogger(DataTreeChangeListenerSupport.class);
-    private final ArrayList<DelayedDataTreeListenerRegistration> delayedRegistrations = new ArrayList<>();
-    private final Collection<ActorSelection> actors = new ArrayList<>();
+final class DataTreeChangeListenerSupport extends AbstractDataListenerSupport<DOMDataTreeChangeListener,
+        RegisterDataTreeChangeListener> {
 
     DataTreeChangeListenerSupport(final Shard shard) {
         super(shard);
     }
 
     @Override
-    void onLeadershipChange(final boolean isLeader) {
-        if (isLeader) {
-            for (DelayedDataTreeListenerRegistration reg : delayedRegistrations) {
-                reg.createDelegate(this);
-            }
-            delayedRegistrations.clear();
-            delayedRegistrations.trimToSize();
-        }
+    void doRegistration(final RegisterDataTreeChangeListener message, final ActorRef registrationActor) {
+        final ActorSelection listenerActor = processListenerRegistrationMessage(message);
 
-        final EnableNotification msg = new EnableNotification(isLeader);
-        for (ActorSelection dataChangeListener : actors) {
-            dataChangeListener.tell(msg, getSelf());
-        }
-    }
-
-    @Override
-    void onMessage(final RegisterDataTreeChangeListener registerTreeChangeListener, final boolean isLeader) {
-        LOG.debug("{}: registerTreeChangeListener for {}, leader: {}", persistenceId(), registerTreeChangeListener.getPath(), isLeader);
-
-        final ListenerRegistration<DOMDataTreeChangeListener> registration;
-        final DataTreeCandidate event;
-        if (!isLeader) {
-            LOG.debug("{}: Shard is not the leader - delaying registration", persistenceId());
-
-            DelayedDataTreeListenerRegistration delayedReg =
-                    new DelayedDataTreeListenerRegistration(registerTreeChangeListener);
-            delayedRegistrations.add(delayedReg);
-            registration = delayedReg;
-            event = null;
-        } else {
-            final Entry<ListenerRegistration<DOMDataTreeChangeListener>, DataTreeCandidate> res = createDelegate(registerTreeChangeListener);
-            registration = res.getKey();
-            event = res.getValue();
-        }
-
-        ActorRef listenerRegistration = createActor(DataTreeChangeListenerRegistrationActor.props(registration));
+        DOMDataTreeChangeListener listener = new ForwardingDataTreeChangeListener(listenerActor);
 
-        LOG.debug("{}: registerDataChangeListener sending reply, listenerRegistrationPath = {} ",
-            persistenceId(), listenerRegistration.path());
+        log().debug("{}: Registering listenerActor {} for path {}", persistenceId(), listenerActor, message.getPath());
 
-        tellSender(new RegisterDataTreeChangeListenerReply(listenerRegistration));
-        if (event != null) {
-            registration.getInstance().onDataTreeChanged(Collections.singletonList(event));
-        }
+        final ShardDataTree shardDataTree = getShard().getDataStore();
+        shardDataTree.registerTreeChangeListener(message.getPath(),
+                listener, shardDataTree.readCurrentData(), registration -> registrationActor.tell(
+                        new DataTreeNotificationListenerRegistrationActor.SetRegistration(registration, () ->
+                            removeListenerActor(listenerActor)), ActorRef.noSender()));
     }
 
     @Override
-    Entry<ListenerRegistration<DOMDataTreeChangeListener>, DataTreeCandidate> createDelegate(final RegisterDataTreeChangeListener message) {
-        ActorSelection dataChangeListenerPath = selectActor(message.getDataTreeChangeListenerPath());
-
-        // 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(true), 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
-        actors.add(dataChangeListenerPath);
-
-        DOMDataTreeChangeListener listener = new ForwardingDataTreeChangeListener(dataChangeListenerPath);
-
-        LOG.debug("{}: Registering for path {}", persistenceId(), message.getPath());
-
-        return getShard().getDataStore().registerTreeChangeListener(message.getPath(), listener);
+    protected String logName() {
+        return "registerTreeChangeListener";
     }
 }