- private final DOMStoreReadTransaction transaction;
- private final LoggingAdapter log =
- Logging.getLogger(getContext().system(), this);
-
- public ShardReadTransaction(DOMStoreReadTransaction transaction, ActorRef shardActor, SchemaContext schemaContext) {
- super(shardActor, schemaContext);
- this.transaction = transaction;
-
- }
-
- public ShardReadTransaction(DOMStoreTransactionChain transactionChain, DOMStoreReadTransaction transaction, ActorRef shardActor, SchemaContext schemaContext) {
- super(transactionChain, shardActor, schemaContext);
- this.transaction = transaction;
- }
-
- @Override
- public void handleReceive(Object message) throws Exception {
- if (ReadData.SERIALIZABLE_CLASS.equals(message.getClass())) {
- readData(transaction,ReadData.fromSerializable(message));
- } else {
- super.handleReceive(message);
+ private static final YangInstanceIdentifier DATASTORE_ROOT = YangInstanceIdentifier.builder().build();
+
+ private final DOMStoreReadTransaction transaction;
+
+ public ShardReadTransaction(DOMStoreReadTransaction transaction, ActorRef shardActor,
+ SchemaContext schemaContext, ShardStats shardStats, String transactionID,
+ short clientTxVersion) {
+ super(shardActor, schemaContext, shardStats, transactionID, clientTxVersion);
+ this.transaction = transaction;
+ }
+
+ @Override
+ public void handleReceive(Object message) throws Exception {
+ if(message instanceof ReadData) {
+ readData(transaction, (ReadData) message, !SERIALIZED_REPLY);
+
+ } else if (message instanceof DataExists) {
+ dataExists(transaction, (DataExists) message, !SERIALIZED_REPLY);
+ } else if (message instanceof CreateSnapshot) {
+ createSnapshot();
+ } else if(ReadData.SERIALIZABLE_CLASS.equals(message.getClass())) {
+ readData(transaction, ReadData.fromSerializable(message), SERIALIZED_REPLY);
+
+ } else if(DataExists.SERIALIZABLE_CLASS.equals(message.getClass())) {
+ dataExists(transaction, DataExists.fromSerializable(message), SERIALIZED_REPLY);
+
+ } else {
+ super.handleReceive(message);
+ }
+ }
+
+ 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);
+ }
+ });
+ }
+
+ @Override
+ protected DOMStoreTransaction getDOMStoreTransaction() {
+ return transaction;