+ private final Map<Object, DOMStoreThreePhaseCommitCohort>
+ modificationToCohort = new HashMap<>();
+
+ private final LoggingAdapter log =
+ Logging.getLogger(getContext().system(), this);
+
+ // By default persistent will be true and can be turned off using the system
+ // property persistent
+ private final boolean persistent;
+
+ private SchemaContext schemaContext;
+
+ private Shard(String name) {
+
+ String setting = System.getProperty("shard.persistent");
+ this.persistent = !"false".equals(setting);
+
+ log.info("Creating shard : {} persistent : {}", name , persistent);
+
+ store = new InMemoryDOMDataStore(name, storeExecutor);
+ }
+
+ public static Props props(final String name) {
+ return Props.create(new Creator<Shard>() {
+
+ @Override
+ public Shard create() throws Exception {
+ return new Shard(name);
+ }
+
+ });
+ }
+
+
+ @Override
+ public void onReceive(Object message) throws Exception {
+ log.debug("Received message {}", message);
+
+ if(!recoveryFinished()){
+ // FIXME : Properly handle recovery
+ return;
+ }
+
+ if (message instanceof CreateTransactionChain) {
+ createTransactionChain();
+ } else if (message.getClass().equals(RegisterChangeListener.SERIALIZABLE_CLASS)) {
+ registerChangeListener(RegisterChangeListener.fromSerializable(getContext().system(), message));
+ } else if (message instanceof UpdateSchemaContext) {
+ updateSchemaContext((UpdateSchemaContext) message);
+ } else if (message instanceof ForwardedCommitTransaction) {
+ handleForwardedCommit((ForwardedCommitTransaction) message);
+ } else if (message instanceof Persistent) {
+ commit(((Persistent)message).payload());
+ } else if (message instanceof CreateTransaction) {
+ createTransaction((CreateTransaction) message);
+ } else if(message instanceof NonPersistent){
+ commit(((NonPersistent)message).payload());
+ } else {
+ throw new Exception("Not recognized message in Shard::OnReceive"+message);
+ }
+ }
+
+ private void createTransaction(CreateTransaction createTransaction) {
+ DOMStoreReadWriteTransaction transaction =
+ store.newReadWriteTransaction();
+ ActorRef transactionActor = getContext().actorOf(
+ ShardTransaction.props(transaction, getSelf(), schemaContext), "shard-" + createTransaction.getTransactionId());
+ getSender()
+ .tell(new CreateTransactionReply(transactionActor.path().toString(), createTransaction.getTransactionId()).toSerializable(),
+ getSelf());
+ }
+
+ private void commit(Object serialized) {
+ Modification modification = MutableCompositeModification.fromSerializable(serialized, schemaContext);
+ DOMStoreThreePhaseCommitCohort cohort =
+ modificationToCohort.remove(serialized);
+ if (cohort == null) {
+ log.error(
+ "Could not find cohort for modification : " + modification);
+ return;
+ }
+ final ListenableFuture<Void> future = cohort.commit();
+ final ActorRef sender = getSender();
+ final ActorRef self = getSelf();
+ future.addListener(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ future.get();
+ sender.tell(new CommitTransactionReply(), self);
+ } catch (InterruptedException | ExecutionException e) {
+ // FIXME : Handle this properly
+ log.error(e, "An exception happened when committing");
+ }
+ }
+ }, getContext().dispatcher());