import akka.actor.ActorRef;
import akka.actor.ActorSelection;
-import java.util.ArrayList;
-import java.util.List;
-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.RegisterChangeListener;
import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
-import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
-import org.opendaylight.controller.md.sal.dom.store.impl.DOMImmutableDataChangeEvent;
-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;
-final class DataChangeListenerSupport extends LeaderLocalDelegateFactory<RegisterChangeListener, ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>, DOMImmutableDataChangeEvent> {
- private static final Logger LOG = LoggerFactory.getLogger(DataChangeListenerSupport.class);
- private final List<DelayedListenerRegistration> delayedListenerRegistrations = new ArrayList<>();
- private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
+final class DataChangeListenerSupport extends AbstractDataListenerSupport<
+ AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>, RegisterChangeListener,
+ DelayedDataChangeListenerRegistration> {
DataChangeListenerSupport(final Shard shard) {
super(shard);
}
@Override
- void onLeadershipChange(final boolean isLeader) {
- for (ActorSelection dataChangeListener : dataChangeListeners) {
- dataChangeListener.tell(new EnableNotification(isLeader), getSelf());
- }
+ void doRegistration(final RegisterChangeListener message, final ActorRef registrationActor) {
+ final ActorSelection listenerActor = processListenerRegistrationMessage(message);
- if (isLeader) {
- for (DelayedListenerRegistration reg: delayedListenerRegistrations) {
- if(!reg.isClosed()) {
- final Entry<ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>, DOMImmutableDataChangeEvent> res =
- createDelegate(reg.getRegisterChangeListener());
- reg.setDelegate(res.getKey());
- if (res.getValue() != null) {
- reg.getInstance().onDataChanged(res.getValue());
- }
- }
- }
+ AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener =
+ new DataChangeListenerProxy(listenerActor);
+
+ log().debug("{}: Registering for path {}", persistenceId(), message.getPath());
- delayedListenerRegistrations.clear();
- }
+ final ShardDataTree shardDataTree = getShard().getDataStore();
+ shardDataTree.registerDataChangeListener(message.getPath(), listener, message.getScope(),
+ shardDataTree.readCurrentData(), registration -> registrationActor.tell(
+ new DataTreeNotificationListenerRegistrationActor.SetRegistration(registration, () ->
+ removeListenerActor(listenerActor)), ActorRef.noSender()));
}
@Override
- void onMessage(final RegisterChangeListener message, final boolean isLeader) {
-
- LOG.debug("{}: registerDataChangeListener for {}, leader: {}", persistenceId(), message.getPath(), isLeader);
-
- final ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier,
- NormalizedNode<?, ?>>> registration;
- final AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>> event;
- if (isLeader) {
- final Entry<ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>, DOMImmutableDataChangeEvent> res =
- createDelegate(message);
- registration = res.getKey();
- event = res.getValue();
- } else {
- LOG.debug("{}: Shard is not the leader - delaying registration", persistenceId());
-
- DelayedListenerRegistration delayedReg = new DelayedListenerRegistration(message);
- delayedListenerRegistrations.add(delayedReg);
- registration = delayedReg;
- event = null;
- }
-
- ActorRef listenerRegistration = createActor(DataChangeListenerRegistration.props(registration));
-
- LOG.debug("{}: registerDataChangeListener sending reply, listenerRegistrationPath = {} ",
- persistenceId(), listenerRegistration.path());
-
- tellSender(new RegisterChangeListenerReply(listenerRegistration));
- if (event != null) {
- registration.getInstance().onDataChanged(event);
- }
+ protected DelayedDataChangeListenerRegistration newDelayedListenerRegistration(RegisterChangeListener message,
+ ActorRef registrationActor) {
+ return new DelayedDataChangeListenerRegistration(message, registrationActor);
}
@Override
- Entry<ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>, DOMImmutableDataChangeEvent> createDelegate(
- final RegisterChangeListener message) {
- ActorSelection dataChangeListenerPath = selectActor(message.getDataChangeListenerPath());
-
- // 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
- dataChangeListeners.add(dataChangeListenerPath);
-
- AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener =
- new DataChangeListenerProxy(dataChangeListenerPath);
-
- LOG.debug("{}: Registering for path {}", persistenceId(), message.getPath());
+ protected Object newRegistrationReplyMessage(ActorRef registrationActor) {
+ return new RegisterChangeListenerReply(registrationActor);
+ }
- return getShard().getDataStore().registerChangeListener(message.getPath(), listener,
- message.getScope());
+ @Override
+ protected String logName() {
+ return "registerDataChangeListener";
}
}