+
+ boolean treeChange = true;
+ for (DOMStore ds : datastores.values()) {
+ if (!(ds instanceof DOMStoreTreeChangePublisher)) {
+ treeChange = false;
+ break;
+ }
+ }
+
+ if (treeChange) {
+ extensions = ImmutableMap.<Class<? extends DOMDataBrokerExtension>, DOMDataBrokerExtension>of(DOMDataTreeChangeService.class, new DOMDataTreeChangeService() {
+ @Override
+ public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerDataTreeChangeListener(final DOMDataTreeIdentifier treeId, final L listener) {
+ DOMStore publisher = getTxFactories().get(treeId.getDatastoreType());
+ checkState(publisher != null, "Requested logical data store is not available.");
+
+ return ((DOMStoreTreeChangePublisher)publisher).registerTreeChangeListener(treeId.getRootIdentifier(), listener);
+ }
+ });
+ } else {
+ extensions = Collections.emptyMap();
+ }