+ private void createSnapshot() {
+
+ // This is a special message sent by the shard to send back a serialized snapshot of the whole
+ // data store tree. This transaction was created for that purpose only so we can
+ // self-destruct after sending the reply.
+
+ final ActorRef sender = getSender();
+ final ActorRef self = getSelf();
+ final ListenableFuture<Optional<NormalizedNode<?, ?>>> future = transaction.read(DATASTORE_ROOT);
+
+ Futures.addCallback(future, new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
+ @Override
+ public void onSuccess(Optional<NormalizedNode<?, ?>> result) {
+ byte[] serialized = SerializationUtils.serializeNormalizedNode(result.get());
+ sender.tell(new CaptureSnapshotReply(serialized), self);
+
+ self.tell(PoisonPill.getInstance(), self);
+ }
+
+ @Override
+ public void onFailure(Throwable t) {
+ sender.tell(new akka.actor.Status.Failure(t), self);
+
+ self.tell(PoisonPill.getInstance(), self);
+ }
+ });
+ }
+