import akka.actor.Props;
import akka.japi.Creator;
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
import org.opendaylight.controller.cluster.datastore.messages.DataChanged;
import org.opendaylight.controller.cluster.datastore.messages.DataChangedReply;
import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
public class DataChangeListener extends AbstractUntypedActor {
+ private static final Logger LOG = LoggerFactory.getLogger(DataChangeListener.class);
+
private final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
- private final SchemaContext schemaContext;
- private final YangInstanceIdentifier pathId;
private boolean notificationsEnabled = false;
- public DataChangeListener(SchemaContext schemaContext,
- AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener, YangInstanceIdentifier pathId) {
- this.listener = listener;
- this.schemaContext = schemaContext;
- this.pathId = pathId;
+ public DataChangeListener(AsyncDataChangeListener<YangInstanceIdentifier,
+ NormalizedNode<?, ?>> listener) {
+ this.listener = Preconditions.checkNotNull(listener, "listener should not be null");
}
- @Override public void handleReceive(Object message) throws Exception {
- if(message.getClass().equals(DataChanged.SERIALIZABLE_CLASS)){
+ @Override
+ public void handleReceive(Object message) throws Exception {
+ if(message instanceof DataChanged){
dataChanged(message);
} else if(message instanceof EnableNotification){
enableNotification((EnableNotification) message);
private void enableNotification(EnableNotification message) {
notificationsEnabled = message.isEnabled();
+ LOG.debug("{} notifications for listener {}", (notificationsEnabled ? "Enabled" : "Disabled"),
+ listener);
}
- public void dataChanged(Object message) {
+ private void dataChanged(Object message) {
// Do nothing if notifications are not enabled
- if(!notificationsEnabled){
+ if(!notificationsEnabled) {
+ LOG.debug("Notifications not enabled for listener {} - dropping change notification",
+ listener);
return;
}
- DataChanged reply = DataChanged.fromSerialize(schemaContext,message, pathId);
- AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>>
- change = reply.getChange();
+ DataChanged reply = (DataChanged) message;
+ AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>> change = reply.getChange();
+
+ LOG.debug("Sending change notification {} to listener {}", change, listener);
+
this.listener.onDataChanged(change);
- if(getSender() != null){
- getSender().tell(new DataChangedReply().toSerializable(), getSelf());
+ // It seems the sender is never null but it doesn't hurt to check. If the caller passes in
+ // a null sender (ActorRef.noSender()), akka translates that to the deadLetters actor.
+ if(getSender() != null && !getContext().system().deadLetters().equals(getSender())) {
+ getSender().tell(new DataChangedReply(), getSelf());
}
}
- public static Props props(final SchemaContext schemaContext, final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener, final YangInstanceIdentifier pathId) {
- return Props.create(new Creator<DataChangeListener>() {
- @Override
- public DataChangeListener create() throws Exception {
- return new DataChangeListener(schemaContext,listener,pathId );
- }
+ public static Props props(final AsyncDataChangeListener<YangInstanceIdentifier,
+ NormalizedNode<?, ?>> listener) {
+ return Props.create(new DataChangeListenerCreator(listener));
+ }
+
+ private static class DataChangeListenerCreator implements Creator<DataChangeListener> {
+ private static final long serialVersionUID = 1L;
+
+ final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
- });
+ DataChangeListenerCreator(
+ AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener) {
+ this.listener = listener;
+ }
+ @Override
+ public DataChangeListener create() throws Exception {
+ return new DataChangeListener(listener);
+ }
}
}