+ public static final String DEFAULT_NAME = "default";
+
+ private final ListeningExecutorService storeExecutor =
+ MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2));
+
+ private final InMemoryDOMDataStore store;
+
+ private final Map<Modification, DOMStoreThreePhaseCommitCohort>
+ modificationToCohort = new HashMap<>();
+
+ private final LoggingAdapter log =
+ Logging.getLogger(getContext().system(), this);
+
+ private Shard(String name) {
+ 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 {
+ if (message instanceof CreateTransactionChain) {
+ createTransactionChain();
+ } else if (message instanceof RegisterChangeListener) {
+ registerChangeListener((RegisterChangeListener) 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);
+ }
+ }
+
+ private void commit(Persistent message) {
+ Modification modification = (Modification) message.payload();
+ DOMStoreThreePhaseCommitCohort cohort =
+ modificationToCohort.remove(modification);
+ 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) {
+ log.error(e, "An exception happened when committing");
+ }
+ }
+ }, getContext().dispatcher());
+ }