import akka.actor.ActorRef;
import akka.actor.ActorSelection;
-import com.google.common.base.Preconditions;
-import java.util.ArrayList;
-import java.util.Collection;
+import com.google.common.base.Optional;
+import java.util.Map.Entry;
import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
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.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-final class DataTreeChangeListenerSupport extends LeaderLocalDelegateFactory<RegisterDataTreeChangeListener, ListenerRegistration<DOMDataTreeChangeListener>> {
- private static final Logger LOG = LoggerFactory.getLogger(DataTreeChangeListenerSupport.class);
- private final ArrayList<DelayedDataTreeListenerRegistration> delayedRegistrations = new ArrayList<>();
- private final Collection<ActorSelection> actors = new ArrayList<>();
- private final Shard shard;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
+final class DataTreeChangeListenerSupport extends AbstractDataListenerSupport<DOMDataTreeChangeListener,
+ RegisterDataTreeChangeListener, DelayedDataTreeListenerRegistration, ListenerRegistration<DOMDataTreeChangeListener>> {
DataTreeChangeListenerSupport(final Shard shard) {
- this.shard = Preconditions.checkNotNull(shard);
+ super(shard);
}
@Override
- void onLeadershipChange(final boolean isLeader) {
- if (isLeader) {
- for (DelayedDataTreeListenerRegistration reg : delayedRegistrations) {
- reg.createDelegate(this);
- }
- delayedRegistrations.clear();
- delayedRegistrations.trimToSize();
- }
+ Entry<ListenerRegistration<DOMDataTreeChangeListener>, Optional<DataTreeCandidate>> createDelegate(
+ final RegisterDataTreeChangeListener message) {
+ ActorSelection dataChangeListenerPath = selectActor(message.getDataTreeChangeListenerPath());
- final EnableNotification msg = new EnableNotification(isLeader);
- for (ActorSelection dataChangeListener : actors) {
- dataChangeListener.tell(msg, shard.getSelf());
- }
- }
+ // 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());
- @Override
- void onMessage(final RegisterDataTreeChangeListener registerTreeChangeListener, final boolean isLeader) {
- LOG.debug("{}: registerTreeChangeListener for {}, leader: {}", shard.persistenceId(), registerTreeChangeListener.getPath(), isLeader);
+ // 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
+ if(!message.isRegisterOnAllInstances()) {
+ addListenerActor(dataChangeListenerPath);
+ }
- final ListenerRegistration<DOMDataTreeChangeListener> registration;
- if (!isLeader) {
- LOG.debug("{}: Shard is not the leader - delaying registration", shard.persistenceId());
+ DOMDataTreeChangeListener listener = new ForwardingDataTreeChangeListener(dataChangeListenerPath);
- DelayedDataTreeListenerRegistration delayedReg =
- new DelayedDataTreeListenerRegistration(registerTreeChangeListener);
- delayedRegistrations.add(delayedReg);
- registration = delayedReg;
- } else {
- registration = createDelegate(registerTreeChangeListener);
- }
+ log().debug("{}: Registering for path {}", persistenceId(), message.getPath());
- ActorRef listenerRegistration = shard.getContext().actorOf(
- DataTreeChangeListenerRegistrationActor.props(registration));
+ Entry<ListenerRegistration<DOMDataTreeChangeListener>, Optional<DataTreeCandidate>> regEntry =
+ getShard().getDataStore().registerTreeChangeListener(message.getPath(), listener);
- LOG.debug("{}: registerDataChangeListener sending reply, listenerRegistrationPath = {} ",
- shard.persistenceId(), listenerRegistration.path());
+ getShard().getDataStore().notifyOfInitialData(message.getPath(),
+ regEntry.getKey().getInstance(), regEntry.getValue());
- shard.getSender().tell(new RegisterDataTreeChangeListenerReply(listenerRegistration), shard.getSelf());
+ return regEntry;
}
@Override
- ListenerRegistration<DOMDataTreeChangeListener> createDelegate(final RegisterDataTreeChangeListener message) {
- ActorSelection dataChangeListenerPath = shard.getContext().system().actorSelection(
- message.getDataTreeChangeListenerPath().path());
-
- // 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), shard.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);
+ protected DelayedDataTreeListenerRegistration newDelayedListenerRegistration(RegisterDataTreeChangeListener message) {
+ return new DelayedDataTreeListenerRegistration(message);
+ }
- DOMDataTreeChangeListener listener = new ForwardingDataTreeChangeListener(dataChangeListenerPath);
+ @Override
+ protected ActorRef newRegistrationActor(ListenerRegistration<DOMDataTreeChangeListener> registration) {
+ return createActor(DataTreeChangeListenerRegistrationActor.props(registration));
+ }
- LOG.debug("{}: Registering for path {}", shard.persistenceId(), message.getPath());
+ @Override
+ protected Object newRegistrationReplyMessage(ActorRef registrationActor) {
+ return new RegisterDataTreeChangeListenerReply(registrationActor);
+ }
- return shard.getDataStore().registerTreeChangeListener(message.getPath(), listener);
+ @Override
+ protected String logName() {
+ return "registerTreeChangeListener";
}
}