*/
package org.opendaylight.controller.cluster.datastore;
-import com.google.common.base.Preconditions;
-import java.util.ArrayList;
-import java.util.List;
import akka.actor.ActorRef;
import akka.actor.ActorSelection;
-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.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;
-final class DataChangeListenerSupport extends LeaderLocalDelegateFactory<RegisterChangeListener, ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>> {
- private static final Logger LOG = LoggerFactory.getLogger(DataChangeListenerSupport.class);
- private final List<DelayedListenerRegistration> delayedListenerRegistrations = new ArrayList<>();
- private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
- private final Shard shard;
+final class DataChangeListenerSupport extends AbstractDataListenerSupport<
+ AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>, RegisterChangeListener,
+ DelayedDataChangeListenerRegistration> {
DataChangeListenerSupport(final Shard shard) {
- this.shard = Preconditions.checkNotNull(shard);
+ super(shard);
}
@Override
- void onLeadershipChange(final boolean isLeader) {
- for (ActorSelection dataChangeListener : dataChangeListeners) {
- dataChangeListener.tell(new EnableNotification(isLeader), shard.getSelf());
- }
+ void doRegistration(final RegisterChangeListener message, final ActorRef registrationActor) {
+ final ActorSelection listenerActor = processListenerRegistrationMessage(message);
- if (isLeader) {
- for (DelayedListenerRegistration reg: delayedListenerRegistrations) {
- if(!reg.isClosed()) {
- reg.setDelegate(createDelegate(reg.getRegisterChangeListener()));
- }
- }
+ 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: {}", shard.persistenceId(), message.getPath(), isLeader);
-
- ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier,
- NormalizedNode<?, ?>>> registration;
- if (isLeader) {
- registration = createDelegate(message);
- } else {
- LOG.debug("{}: Shard is not the leader - delaying registration", shard.persistenceId());
-
- DelayedListenerRegistration delayedReg = new DelayedListenerRegistration(message);
- delayedListenerRegistrations.add(delayedReg);
- registration = delayedReg;
- }
-
- ActorRef listenerRegistration = shard.getContext().actorOf(
- DataChangeListenerRegistration.props(registration));
-
- LOG.debug("{}: registerDataChangeListener sending reply, listenerRegistrationPath = {} ",
- shard.persistenceId(), listenerRegistration.path());
-
- shard.getSender().tell(new RegisterChangeListenerReply(listenerRegistration), shard.getSelf());
+ protected DelayedDataChangeListenerRegistration newDelayedListenerRegistration(RegisterChangeListener message,
+ ActorRef registrationActor) {
+ return new DelayedDataChangeListenerRegistration(message, registrationActor);
}
@Override
- ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>> createDelegate(
- final RegisterChangeListener message) {
- ActorSelection dataChangeListenerPath = shard.getContext().system().actorSelection(
- 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), 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
- dataChangeListeners.add(dataChangeListenerPath);
-
- AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener =
- new DataChangeListenerProxy(dataChangeListenerPath);
-
- LOG.debug("{}: Registering for path {}", shard.persistenceId(), message.getPath());
+ protected Object newRegistrationReplyMessage(ActorRef registrationActor) {
+ return new RegisterChangeListenerReply(registrationActor);
+ }
- return shard.getDataStore().registerChangeListener(message.getPath(), listener,
- message.getScope());
+ @Override
+ protected String logName() {
+ return "registerDataChangeListener";
}
}