import akka.actor.ActorPath;
import akka.actor.ActorSelection;
+import akka.dispatch.OnComplete;
+
+import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
-import com.google.common.util.concurrent.ListenableFuture;
-import com.google.common.util.concurrent.ListenableFutureTask;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Lists;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.SettableFuture;
+
+import org.opendaylight.controller.cluster.datastore.identifiers.TransactionIdentifier;
import org.opendaylight.controller.cluster.datastore.messages.CloseTransaction;
import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.DataExists;
+import org.opendaylight.controller.cluster.datastore.messages.DataExistsReply;
import org.opendaylight.controller.cluster.datastore.messages.DeleteData;
import org.opendaylight.controller.cluster.datastore.messages.MergeData;
import org.opendaylight.controller.cluster.datastore.messages.ReadData;
import org.opendaylight.controller.cluster.datastore.messages.ReadyTransaction;
import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
import org.opendaylight.controller.cluster.datastore.messages.WriteData;
+import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
+import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.util.concurrent.MappingCheckedFuture;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import scala.Function1;
+import scala.concurrent.Future;
+import scala.runtime.AbstractFunction1;
-import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicLong;
/**
READ_WRITE
}
+ static Function1<Throwable, Throwable> SAME_FAILURE_TRANSFORMER = new AbstractFunction1<
+ Throwable, Throwable>() {
+ @Override
+ public Throwable apply(Throwable failure) {
+ return failure;
+ }
+ };
+
private static final AtomicLong counter = new AtomicLong();
+ private static final Logger
+ LOG = LoggerFactory.getLogger(TransactionProxy.class);
+
+
private final TransactionType transactionType;
private final ActorContext actorContext;
- private final Map<String, ActorSelection> remoteTransactionPaths = new HashMap<>();
- private final String identifier;
- private final ExecutorService executor;
+ private final Map<String, TransactionContext> remoteTransactionPaths = new HashMap<>();
+ private final TransactionIdentifier identifier;
+ private final SchemaContext schemaContext;
+ private boolean inReadyState;
+
+ public TransactionProxy(ActorContext actorContext, TransactionType transactionType,
+ SchemaContext schemaContext) {
+ this.actorContext = Preconditions.checkNotNull(actorContext, "actorContext should not be null");
+ this.transactionType = Preconditions.checkNotNull(transactionType, "transactionType should not be null");
+ this.schemaContext = Preconditions.checkNotNull(schemaContext, "schemaContext should not be null");
+
+ String memberName = actorContext.getCurrentMemberName();
+ if(memberName == null){
+ memberName = "UNKNOWN-MEMBER";
+ }
+
+ this.identifier = TransactionIdentifier.builder().memberName(memberName).counter(
+ counter.getAndIncrement()).build();
- public TransactionProxy(
- ActorContext actorContext,
- TransactionType transactionType,
- ExecutorService executor
- ) {
+ LOG.debug("Created txn {} of type {}", identifier, transactionType);
- this.identifier = "txn-" + counter.getAndIncrement();
- this.transactionType = transactionType;
- this.actorContext = actorContext;
- this.executor = executor;
+ }
- Object response = actorContext.executeShardOperation(Shard.DEFAULT_NAME, new CreateTransaction(identifier), ActorContext.ASK_DURATION);
- if(response instanceof CreateTransactionReply){
- CreateTransactionReply reply = (CreateTransactionReply) response;
- remoteTransactionPaths.put(Shard.DEFAULT_NAME, actorContext.actorSelection(reply.getTransactionPath()));
+ @VisibleForTesting
+ List<Future<Object>> getRecordedOperationFutures() {
+ List<Future<Object>> recordedOperationFutures = Lists.newArrayList();
+ for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
+ recordedOperationFutures.addAll(transactionContext.getRecordedOperationFutures());
}
+
+ return recordedOperationFutures;
}
@Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
- final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
-
- Callable<Optional<NormalizedNode<?,?>>> call = new Callable() {
-
- @Override public Optional<NormalizedNode<?,?>> call() throws Exception {
- Object response = actorContext
- .executeRemoteOperation(remoteTransaction, new ReadData(path),
- ActorContext.ASK_DURATION);
- if(response instanceof ReadDataReply){
- ReadDataReply reply = (ReadDataReply) response;
- if(reply.getNormalizedNode() == null){
- return Optional.absent();
- }
- //FIXME : A cast should not be required here ???
- return (Optional<NormalizedNode<?, ?>>) Optional.of(reply.getNormalizedNode());
- }
+ public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(
+ final YangInstanceIdentifier path) {
- return Optional.absent();
- }
- };
+ Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
+ "Read operation on write-only transaction is not allowed");
+
+ LOG.debug("Tx {} read {}", identifier, path);
+
+ createTransactionIfMissing(actorContext, path);
+
+ return transactionContext(path).readData(path);
+ }
+
+ @Override
+ public CheckedFuture<Boolean, ReadFailedException> exists(YangInstanceIdentifier path) {
- ListenableFutureTask<Optional<NormalizedNode<?, ?>>>
- future = ListenableFutureTask.create(call);
+ Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
+ "Exists operation on write-only transaction is not allowed");
- executor.submit(future);
+ LOG.debug("Tx {} exists {}", identifier, path);
- return future;
+ createTransactionIfMissing(actorContext, path);
+
+ return transactionContext(path).dataExists(path);
+ }
+
+ private void checkModificationState() {
+ Preconditions.checkState(transactionType != TransactionType.READ_ONLY,
+ "Modification operation on read-only transaction is not allowed");
+ Preconditions.checkState(!inReadyState,
+ "Transaction is sealed - further modifications are allowed");
}
@Override
- public void write(InstanceIdentifier path, NormalizedNode<?, ?> data) {
- final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
- remoteTransaction.tell(new WriteData(path, data), null);
+ public void write(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+
+ checkModificationState();
+
+ LOG.debug("Tx {} write {}", identifier, path);
+
+ createTransactionIfMissing(actorContext, path);
+
+ transactionContext(path).writeData(path, data);
}
@Override
- public void merge(InstanceIdentifier path, NormalizedNode<?, ?> data) {
- final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
- remoteTransaction.tell(new MergeData(path, data), null);
+ public void merge(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+
+ checkModificationState();
+
+ LOG.debug("Tx {} merge {}", identifier, path);
+
+ createTransactionIfMissing(actorContext, path);
+
+ transactionContext(path).mergeData(path, data);
}
@Override
- public void delete(InstanceIdentifier path) {
- final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
- remoteTransaction.tell(new DeleteData(path), null);
+ public void delete(YangInstanceIdentifier path) {
+
+ checkModificationState();
+
+ LOG.debug("Tx {} delete {}", identifier, path);
+
+ createTransactionIfMissing(actorContext, path);
+
+ transactionContext(path).deleteData(path);
}
@Override
public DOMStoreThreePhaseCommitCohort ready() {
- List<ActorPath> cohortPaths = new ArrayList<>();
- for(ActorSelection remoteTransaction : remoteTransactionPaths.values()) {
- Object result = actorContext.executeRemoteOperation(remoteTransaction,
- new ReadyTransaction(),
- ActorContext.ASK_DURATION
- );
+ checkModificationState();
- if(result instanceof ReadyTransactionReply){
- ReadyTransactionReply reply = (ReadyTransactionReply) result;
- cohortPaths.add(reply.getCohortPath());
- }
+ inReadyState = true;
+
+ LOG.debug("Tx {} Trying to get {} transactions ready for commit", identifier,
+ remoteTransactionPaths.size());
+
+ List<Future<ActorPath>> cohortPathFutures = Lists.newArrayList();
+
+ for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
+
+ LOG.debug("Tx {} Readying transaction for shard {}", identifier,
+ transactionContext.getShardName());
+
+ cohortPathFutures.add(transactionContext.readyTransaction());
}
- return new ThreePhaseCommitCohortProxy(actorContext, cohortPaths, identifier, executor);
+ return new ThreePhaseCommitCohortProxy(actorContext, cohortPathFutures,
+ identifier.toString());
}
@Override
@Override
public void close() {
- for(ActorSelection remoteTransaction : remoteTransactionPaths.values()) {
- remoteTransaction.tell(new CloseTransaction(), null);
+ for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
+ transactionContext.closeTransaction();
}
}
- private ActorSelection remoteTransactionFromIdentifier(InstanceIdentifier path){
+ private TransactionContext transactionContext(YangInstanceIdentifier path){
String shardName = shardNameFromIdentifier(path);
return remoteTransactionPaths.get(shardName);
}
- private String shardNameFromIdentifier(InstanceIdentifier path){
- return Shard.DEFAULT_NAME;
+ 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("Tx {} Received transaction path = {}", identifier, transactionPath);
+
+ ActorSelection transactionActor =
+ actorContext.actorSelection(transactionPath);
+ transactionContext =
+ new TransactionContextImpl(shardName, transactionPath,
+ transactionActor);
+
+ remoteTransactionPaths.put(shardName, transactionContext);
+ } else {
+ throw new IllegalArgumentException(String.format(
+ "Invalid reply type {} for CreateTransaction", response.getClass()));
+ }
+ } catch(Exception e){
+ LOG.debug("Tx {} Creating NoOpTransaction because of : {}", identifier, e.getMessage());
+ remoteTransactionPaths.put(shardName, new NoOpTransactionContext(shardName, e));
+ }
+ }
+
+ private interface TransactionContext {
+ String getShardName();
+
+ void closeTransaction();
+
+ Future<ActorPath> readyTransaction();
+
+ void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data);
+
+ void deleteData(YangInstanceIdentifier path);
+
+ void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data);
+
+ CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readData(
+ final YangInstanceIdentifier path);
+
+ CheckedFuture<Boolean, ReadFailedException> dataExists(YangInstanceIdentifier path);
+
+ List<Future<Object>> getRecordedOperationFutures();
+ }
+
+ private abstract class AbstractTransactionContext implements TransactionContext {
+
+ protected final String shardName;
+ protected final List<Future<Object>> recordedOperationFutures = Lists.newArrayList();
+
+ AbstractTransactionContext(String shardName) {
+ this.shardName = shardName;
+ }
+
+ @Override
+ public String getShardName() {
+ return shardName;
+ }
+
+ @Override
+ public List<Future<Object>> getRecordedOperationFutures() {
+ return recordedOperationFutures;
+ }
+ }
+
+ private class TransactionContextImpl extends AbstractTransactionContext {
+ private final Logger LOG = LoggerFactory.getLogger(TransactionContextImpl.class);
+
+ private final String actorPath;
+ private final ActorSelection actor;
+
+ private TransactionContextImpl(String shardName, String actorPath,
+ ActorSelection actor) {
+ super(shardName);
+ this.actorPath = actorPath;
+ this.actor = actor;
+ }
+
+ private ActorSelection getActor() {
+ return actor;
+ }
+
+ private String getResolvedCohortPath(String cohortPath) {
+ return actorContext.resolvePath(actorPath, cohortPath);
+ }
+
+ @Override
+ public void closeTransaction() {
+ LOG.debug("Tx {} closeTransaction called", identifier);
+ actorContext.sendRemoteOperationAsync(getActor(), new CloseTransaction().toSerializable());
+ }
+
+ @Override
+ public Future<ActorPath> readyTransaction() {
+ LOG.debug("Tx {} readyTransaction called with {} previous recorded operations pending",
+ identifier, recordedOperationFutures.size());
+
+ // Send the ReadyTransaction message to the Tx actor.
+
+ final Future<Object> replyFuture = actorContext.executeRemoteOperationAsync(getActor(),
+ new ReadyTransaction().toSerializable(), ActorContext.ASK_DURATION);
+
+ // Combine all the previously recorded put/merge/delete operation reply Futures and the
+ // ReadyTransactionReply Future into one Future. If any one fails then the combined
+ // Future will fail. We need all prior operations and the ready operation to succeed
+ // in order to attempt commit.
+
+ List<Future<Object>> futureList =
+ Lists.newArrayListWithCapacity(recordedOperationFutures.size() + 1);
+ futureList.addAll(recordedOperationFutures);
+ futureList.add(replyFuture);
+
+ Future<Iterable<Object>> combinedFutures = akka.dispatch.Futures.sequence(futureList,
+ actorContext.getActorSystem().dispatcher());
+
+ // Transform the combined Future into a Future that returns the cohort actor path from
+ // the ReadyTransactionReply. That's the end result of the ready operation.
+
+ return combinedFutures.transform(new AbstractFunction1<Iterable<Object>, ActorPath>() {
+ @Override
+ public ActorPath apply(Iterable<Object> notUsed) {
+
+ LOG.debug("Tx {} readyTransaction: pending recorded operations succeeded",
+ identifier);
+
+ // At this point all the Futures succeeded and we need to extract the cohort
+ // actor path from the ReadyTransactionReply. For the recorded operations, they
+ // don't return any data so we're only interested that they completed
+ // successfully. We could be paranoid and verify the correct reply types but
+ // that really should never happen so it's not worth the overhead of
+ // de-serializing each reply.
+
+ // Note the Future get call here won't block as it's complete.
+ Object serializedReadyReply = replyFuture.value().get().get();
+ if(serializedReadyReply.getClass().equals(
+ ReadyTransactionReply.SERIALIZABLE_CLASS)) {
+ ReadyTransactionReply reply = ReadyTransactionReply.fromSerializable(
+ actorContext.getActorSystem(), serializedReadyReply);
+
+ String resolvedCohortPath = getResolvedCohortPath(
+ reply.getCohortPath().toString());
+
+ LOG.debug("Tx {} readyTransaction: resolved cohort path {}",
+ identifier, resolvedCohortPath);
+
+ return actorContext.actorFor(resolvedCohortPath);
+ } else {
+ // Throwing an exception here will fail the Future.
+
+ throw new IllegalArgumentException(String.format("Invalid reply type {}",
+ serializedReadyReply.getClass()));
+ }
+ }
+ }, SAME_FAILURE_TRANSFORMER, actorContext.getActorSystem().dispatcher());
+ }
+
+ @Override
+ public void deleteData(YangInstanceIdentifier path) {
+ LOG.debug("Tx {} deleteData called path = {}", identifier, path);
+ recordedOperationFutures.add(actorContext.executeRemoteOperationAsync(getActor(),
+ new DeleteData(path).toSerializable(), ActorContext.ASK_DURATION ));
+ }
+
+ @Override
+ public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ LOG.debug("Tx {} mergeData called path = {}", identifier, path);
+ recordedOperationFutures.add(actorContext.executeRemoteOperationAsync(getActor(),
+ new MergeData(path, data, schemaContext).toSerializable(),
+ ActorContext.ASK_DURATION));
+ }
+
+ @Override
+ public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ LOG.debug("Tx {} writeData called path = {}", identifier, path);
+ recordedOperationFutures.add(actorContext.executeRemoteOperationAsync(getActor(),
+ new WriteData(path, data, schemaContext).toSerializable(),
+ ActorContext.ASK_DURATION));
+ }
+
+ @Override
+ public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readData(
+ final YangInstanceIdentifier path) {
+
+ LOG.debug("Tx {} readData called path = {}", identifier, path);
+
+ final SettableFuture<Optional<NormalizedNode<?, ?>>> returnFuture = SettableFuture.create();
+
+ // If there were any previous recorded put/merge/delete operation reply Futures then we
+ // must wait for them to successfully complete. This is necessary to honor the read
+ // uncommitted semantics of the public API contract. If any one fails then fail the read.
+
+ if(recordedOperationFutures.isEmpty()) {
+ finishReadData(path, returnFuture);
+ } else {
+ LOG.debug("Tx {} readData: verifying {} previous recorded operations",
+ identifier, recordedOperationFutures.size());
+
+ // Note: we make a copy of recordedOperationFutures to be on the safe side in case
+ // Futures#sequence accesses the passed List on a different thread, as
+ // recordedOperationFutures is not synchronized.
+
+ Future<Iterable<Object>> combinedFutures = akka.dispatch.Futures.sequence(
+ Lists.newArrayList(recordedOperationFutures),
+ actorContext.getActorSystem().dispatcher());
+ OnComplete<Iterable<Object>> onComplete = new OnComplete<Iterable<Object>>() {
+ @Override
+ public void onComplete(Throwable failure, Iterable<Object> notUsed)
+ throws Throwable {
+ if(failure != null) {
+ LOG.debug("Tx {} readData: a recorded operation failed: {}",
+ identifier, failure);
+
+ returnFuture.setException(new ReadFailedException(
+ "The read could not be performed because a previous put, merge,"
+ + "or delete operation failed", failure));
+ } else {
+ finishReadData(path, returnFuture);
+ }
+ }
+ };
+
+ combinedFutures.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
+ }
+
+ return MappingCheckedFuture.create(returnFuture, ReadFailedException.MAPPER);
+ }
+
+ private void finishReadData(final YangInstanceIdentifier path,
+ final SettableFuture<Optional<NormalizedNode<?, ?>>> returnFuture) {
+
+ LOG.debug("Tx {} finishReadData called path = {}", identifier, path);
+
+ OnComplete<Object> onComplete = new OnComplete<Object>() {
+ @Override
+ public void onComplete(Throwable failure, Object readResponse) throws Throwable {
+ if(failure != null) {
+ LOG.debug("Tx {} read operation failed: {}", identifier, failure);
+
+ returnFuture.setException(new ReadFailedException(
+ "Error reading data for path " + path, failure));
+ } else {
+ LOG.debug("Tx {} read operation succeeded", identifier, failure);
+
+ if (readResponse.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)) {
+ ReadDataReply reply = ReadDataReply.fromSerializable(schemaContext,
+ path, readResponse);
+ 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> readFuture = actorContext.executeRemoteOperationAsync(getActor(),
+ new ReadData(path).toSerializable(), ActorContext.ASK_DURATION);
+ readFuture.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
+ }
+
+ @Override
+ public CheckedFuture<Boolean, ReadFailedException> dataExists(
+ final YangInstanceIdentifier path) {
+
+ LOG.debug("Tx {} dataExists called path = {}", identifier, path);
+
+ final SettableFuture<Boolean> returnFuture = SettableFuture.create();
+
+ // If there were any previous recorded put/merge/delete operation reply Futures then we
+ // must wait for them to successfully complete. This is necessary to honor the read
+ // uncommitted semantics of the public API contract. If any one fails then fail this
+ // request.
+
+ if(recordedOperationFutures.isEmpty()) {
+ finishDataExists(path, returnFuture);
+ } else {
+ LOG.debug("Tx {} dataExists: verifying {} previous recorded operations",
+ identifier, recordedOperationFutures.size());
+
+ // Note: we make a copy of recordedOperationFutures to be on the safe side in case
+ // Futures#sequence accesses the passed List on a different thread, as
+ // recordedOperationFutures is not synchronized.
+
+ Future<Iterable<Object>> combinedFutures = akka.dispatch.Futures.sequence(
+ Lists.newArrayList(recordedOperationFutures),
+ actorContext.getActorSystem().dispatcher());
+ OnComplete<Iterable<Object>> onComplete = new OnComplete<Iterable<Object>>() {
+ @Override
+ public void onComplete(Throwable failure, Iterable<Object> notUsed)
+ throws Throwable {
+ if(failure != null) {
+ LOG.debug("Tx {} dataExists: a recorded operation failed: {}",
+ identifier, failure);
+
+ returnFuture.setException(new ReadFailedException(
+ "The data exists could not be performed because a previous "
+ + "put, merge, or delete operation failed", failure));
+ } else {
+ finishDataExists(path, returnFuture);
+ }
+ }
+ };
+
+ combinedFutures.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
+ }
+
+ return MappingCheckedFuture.create(returnFuture, ReadFailedException.MAPPER);
+ }
+
+ private void finishDataExists(final YangInstanceIdentifier path,
+ final SettableFuture<Boolean> returnFuture) {
+
+ LOG.debug("Tx {} finishDataExists called path = {}", identifier, path);
+
+ OnComplete<Object> onComplete = new OnComplete<Object>() {
+ @Override
+ public void onComplete(Throwable failure, Object response) throws Throwable {
+ if(failure != null) {
+ LOG.debug("Tx {} dataExists operation failed: {}", identifier, failure);
+
+ returnFuture.setException(new ReadFailedException(
+ "Error checking data exists for path " + path, failure));
+ } else {
+ LOG.debug("Tx {} dataExists operation succeeded", identifier, failure);
+
+ 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());
+ }
+ }
+
+ private class NoOpTransactionContext extends AbstractTransactionContext {
+
+ private final Logger LOG = LoggerFactory.getLogger(NoOpTransactionContext.class);
+
+ private final Exception failure;
+
+ public NoOpTransactionContext(String shardName, Exception failure){
+ super(shardName);
+ this.failure = failure;
+ }
+
+ @Override
+ public void closeTransaction() {
+ LOG.debug("NoOpTransactionContext {} closeTransaction called", identifier);
+ }
+
+ @Override
+ public Future<ActorPath> readyTransaction() {
+ LOG.debug("Tx {} readyTransaction called", identifier);
+ return akka.dispatch.Futures.failed(failure);
+ }
+
+ @Override
+ public void deleteData(YangInstanceIdentifier path) {
+ LOG.debug("Tx {} deleteData called path = {}", identifier, path);
+ }
+
+ @Override
+ public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ LOG.debug("Tx {} mergeData called path = {}", identifier, path);
+ }
+
+ @Override
+ public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ LOG.debug("Tx {} writeData called path = {}", identifier, path);
+ }
+
+ @Override
+ public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readData(
+ YangInstanceIdentifier path) {
+ LOG.debug("Tx {} readData called path = {}", identifier, path);
+ return Futures.immediateFailedCheckedFuture(new ReadFailedException(
+ "Error reading data for path " + path, failure));
+ }
+
+ @Override
+ public CheckedFuture<Boolean, ReadFailedException> dataExists(
+ YangInstanceIdentifier path) {
+ LOG.debug("Tx {} dataExists called path = {}", identifier, path);
+ return Futures.immediateFailedCheckedFuture(new ReadFailedException(
+ "Error checking exists for path " + path, failure));
+ }
}
}