+ private String shardNameFromIdentifier(YangInstanceIdentifier path){
+ return ShardStrategyFactory.getStrategy(path).findShard(path);
+ }
+
+ private void createTransactionIfMissing(ActorContext actorContext, YangInstanceIdentifier path) {
+ String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
+
+ TransactionContext transactionContext =
+ remoteTransactionPaths.get(shardName);
+
+ if(transactionContext != null){
+ // A transaction already exists with that shard
+ return;
+ }
+
+ try {
+ Object response = actorContext.executeShardOperation(shardName,
+ new CreateTransaction(identifier.toString(),this.transactionType.ordinal() ).toSerializable(),
+ ActorContext.ASK_DURATION);
+ if (response.getClass().equals(CreateTransactionReply.SERIALIZABLE_CLASS)) {
+ CreateTransactionReply reply =
+ CreateTransactionReply.fromSerializable(response);
+
+ String transactionPath = reply.getTransactionPath();
+
+ LOG.debug("txn {} Received transaction path = {}", identifier, transactionPath);
+
+ ActorSelection transactionActor =
+ actorContext.actorSelection(transactionPath);
+ transactionContext =
+ new TransactionContextImpl(shardName, transactionPath,
+ transactionActor);
+
+ remoteTransactionPaths.put(shardName, transactionContext);
+ } else {
+ LOG.error("Was expecting {} but got {}", CreateTransactionReply.SERIALIZABLE_CLASS,
+ response.getClass());
+ }
+ } catch(Exception e){
+ LOG.error("txn {} Creating NoOpTransaction because of : {}", identifier, e.getMessage());
+ remoteTransactionPaths.put(shardName, new NoOpTransactionContext(shardName, e));
+ }
+ }
+
+ private interface TransactionContext {
+ String getShardName();
+
+ String getResolvedCohortPath(String cohortPath);
+
+ public void closeTransaction();
+
+ public Object readyTransaction();
+
+ void deleteData(YangInstanceIdentifier path);
+
+ void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data);
+
+ CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readData(
+ final YangInstanceIdentifier path);
+
+ void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data);
+
+ CheckedFuture<Boolean, ReadFailedException> dataExists(YangInstanceIdentifier path);
+ }
+
+
+ private class TransactionContextImpl implements TransactionContext {
+ private final String shardName;
+ private final String actorPath;
+ private final ActorSelection actor;
+
+
+ private TransactionContextImpl(String shardName, String actorPath,
+ ActorSelection actor) {
+ this.shardName = shardName;
+ this.actorPath = actorPath;
+ this.actor = actor;
+ }
+
+ @Override
+ public String getShardName() {
+ return shardName;
+ }
+
+ private ActorSelection getActor() {
+ return actor;
+ }
+
+ @Override
+ public String getResolvedCohortPath(String cohortPath) {
+ return actorContext.resolvePath(actorPath, cohortPath);
+ }
+
+ @Override
+ public void closeTransaction() {
+ actorContext.sendRemoteOperationAsync(getActor(), new CloseTransaction().toSerializable());
+ }
+
+ @Override
+ public Object readyTransaction() {
+ return actorContext.executeRemoteOperation(getActor(),
+ new ReadyTransaction().toSerializable(), ActorContext.ASK_DURATION);
+ }
+
+ @Override
+ public void deleteData(YangInstanceIdentifier path) {
+ actorContext.sendRemoteOperationAsync(getActor(), new DeleteData(path).toSerializable() );
+ }
+
+ @Override
+ public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ actorContext.sendRemoteOperationAsync(getActor(),
+ new MergeData(path, data, schemaContext).toSerializable());
+ }
+
+ @Override
+ public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readData(
+ final YangInstanceIdentifier path) {
+
+ final SettableFuture<Optional<NormalizedNode<?, ?>>> returnFuture = SettableFuture.create();
+
+ OnComplete<Object> onComplete = new OnComplete<Object>() {
+ @Override
+ public void onComplete(Throwable failure, Object response) throws Throwable {
+ if(failure != null) {
+ returnFuture.setException(new ReadFailedException(
+ "Error reading data for path " + path, failure));
+ } else {
+ if (response.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)) {
+ ReadDataReply reply = ReadDataReply.fromSerializable(schemaContext,
+ path, response);
+ if (reply.getNormalizedNode() == null) {
+ returnFuture.set(Optional.<NormalizedNode<?, ?>>absent());
+ } else {
+ returnFuture.set(Optional.<NormalizedNode<?, ?>>of(
+ reply.getNormalizedNode()));
+ }
+ } else {
+ returnFuture.setException(new ReadFailedException(
+ "Invalid response reading data for path " + path));
+ }
+ }
+ }
+ };
+
+ Future<Object> future = actorContext.executeRemoteOperationAsync(getActor(),
+ new ReadData(path).toSerializable(), ActorContext.ASK_DURATION);
+ future.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
+
+ return MappingCheckedFuture.create(returnFuture, ReadFailedException.MAPPER);
+ }
+
+ @Override
+ public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ actorContext.sendRemoteOperationAsync(getActor(),
+ new WriteData(path, data, schemaContext).toSerializable());
+ }
+
+ @Override
+ public CheckedFuture<Boolean, ReadFailedException> dataExists(
+ final YangInstanceIdentifier path) {
+
+ final SettableFuture<Boolean> returnFuture = SettableFuture.create();
+
+ OnComplete<Object> onComplete = new OnComplete<Object>() {
+ @Override
+ public void onComplete(Throwable failure, Object response) throws Throwable {
+ if(failure != null) {
+ returnFuture.setException(new ReadFailedException(
+ "Error checking exists for path " + path, failure));
+ } else {
+ if (response.getClass().equals(DataExistsReply.SERIALIZABLE_CLASS)) {
+ returnFuture.set(Boolean.valueOf(DataExistsReply.
+ fromSerializable(response).exists()));
+ } else {
+ returnFuture.setException(new ReadFailedException(
+ "Invalid response checking exists for path " + path));
+ }
+ }
+ }
+ };
+
+ Future<Object> future = actorContext.executeRemoteOperationAsync(getActor(),
+ new DataExists(path).toSerializable(), ActorContext.ASK_DURATION);
+ future.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
+
+ return MappingCheckedFuture.create(returnFuture, ReadFailedException.MAPPER);
+ }
+ }
+
+ private class NoOpTransactionContext implements TransactionContext {
+
+ private final Logger
+ LOG = LoggerFactory.getLogger(NoOpTransactionContext.class);
+
+ private final String shardName;
+ private final Exception failure;
+
+ private ActorRef cohort;
+
+ public NoOpTransactionContext(String shardName, Exception failure){
+ this.shardName = shardName;
+ this.failure = failure;
+ }
+
+ @Override
+ public String getShardName() {
+ return shardName;
+
+ }
+
+ @Override
+ public String getResolvedCohortPath(String cohortPath) {
+ return cohort.path().toString();
+ }
+
+ @Override
+ public void closeTransaction() {
+ LOG.warn("txn {} closeTransaction called", identifier);
+ }
+
+ @Override public Object readyTransaction() {
+ LOG.warn("txn {} readyTransaction called", identifier);
+ cohort = actorContext.getActorSystem().actorOf(Props.create(NoOpCohort.class));
+ return new ReadyTransactionReply(cohort.path()).toSerializable();
+ }
+
+ @Override
+ public void deleteData(YangInstanceIdentifier path) {
+ LOG.warn("txt {} deleteData called path = {}", identifier, path);
+ }
+
+ @Override
+ public void mergeData(YangInstanceIdentifier path,
+ NormalizedNode<?, ?> data) {
+ LOG.warn("txn {} mergeData called path = {}", identifier, path);
+ }
+
+ @Override
+ public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readData(
+ YangInstanceIdentifier path) {
+ LOG.warn("txn {} readData called path = {}", identifier, path);
+ return Futures.immediateFailedCheckedFuture(new ReadFailedException(
+ "Error reading data for path " + path, failure));
+ }
+
+ @Override public void writeData(YangInstanceIdentifier path,
+ NormalizedNode<?, ?> data) {
+ LOG.warn("txn {} writeData called path = {}", identifier, path);
+ }
+
+ @Override public CheckedFuture<Boolean, ReadFailedException> dataExists(
+ YangInstanceIdentifier path) {
+ LOG.warn("txn {} dataExists called path = {}", identifier, path);
+ return Futures.immediateFailedCheckedFuture(new ReadFailedException(
+ "Error checking exists for path " + path, failure));
+ }