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";
}
}