* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
-
package org.opendaylight.controller.cluster.datastore;
import akka.actor.ActorSelection;
-import akka.dispatch.Mapper;
-import akka.dispatch.OnComplete;
import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.FinalizablePhantomReference;
-import com.google.common.base.FinalizableReferenceQueue;
+import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
-import com.google.common.collect.Lists;
+import com.google.common.collect.Iterables;
import com.google.common.util.concurrent.CheckedFuture;
-import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
-import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
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.ReadDataReply;
-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.cluster.datastore.utils.NormalizedNodeAggregator;
import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
+import org.opendaylight.controller.sal.core.spi.data.AbstractDOMStoreTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
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.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import scala.concurrent.Future;
import scala.concurrent.Promise;
-import scala.concurrent.duration.FiniteDuration;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicLong;
-import javax.annotation.concurrent.GuardedBy;
/**
- * TransactionProxy acts as a proxy for one or more transactions that were created on a remote shard
- * <p>
- * Creating a transaction on the consumer side will create one instance of a transaction proxy. If during
- * the transaction reads and writes are done on data that belongs to different shards then a separate transaction will
- * be created on each of those shards by the TransactionProxy
- *</p>
- * <p>
- * The TransactionProxy does not make any guarantees about atomicity or order in which the transactions on the various
- * shards will be executed.
- * </p>
+ * A transaction potentially spanning multiple backend shards.
*/
-public class TransactionProxy implements DOMStoreReadWriteTransaction {
-
- public static enum TransactionType {
- READ_ONLY,
- WRITE_ONLY,
- READ_WRITE
+public class TransactionProxy extends AbstractDOMStoreTransaction<TransactionIdentifier> implements DOMStoreReadWriteTransaction {
+ private static enum TransactionState {
+ OPEN,
+ READY,
+ CLOSED,
}
+ private static final Logger LOG = LoggerFactory.getLogger(TransactionProxy.class);
- static final Mapper<Throwable, Throwable> SAME_FAILURE_TRANSFORMER =
- new Mapper<Throwable, Throwable>() {
- @Override
- public Throwable apply(Throwable failure) {
- return failure;
- }
- };
-
- private static final AtomicLong counter = new AtomicLong();
+ private final Map<String, TransactionContextWrapper> txContextAdapters = new HashMap<>();
+ private final AbstractTransactionContextFactory<?> txContextFactory;
+ private final TransactionType type;
+ private TransactionState state = TransactionState.OPEN;
+ private volatile OperationCompleter operationCompleter;
+ private volatile Semaphore operationLimiter;
- private static final Logger LOG = LoggerFactory.getLogger(TransactionProxy.class);
+ @VisibleForTesting
+ public TransactionProxy(final AbstractTransactionContextFactory<?> txContextFactory, final TransactionType type) {
+ super(txContextFactory.nextIdentifier(), txContextFactory.getActorContext().getDatastoreContext()
+ .isTransactionDebugContextEnabled());
+ this.txContextFactory = txContextFactory;
+ this.type = Preconditions.checkNotNull(type);
- /**
- * Time interval in between transaction create retries.
- */
- private static final FiniteDuration CREATE_TX_TRY_INTERVAL =
- FiniteDuration.create(1, TimeUnit.SECONDS);
-
- /**
- * Used to enqueue the PhantomReferences for read-only TransactionProxy instances. The
- * FinalizableReferenceQueue is safe to use statically in an OSGi environment as it uses some
- * trickery to clean up its internal thread when the bundle is unloaded.
- */
- private static final FinalizableReferenceQueue phantomReferenceQueue =
- new FinalizableReferenceQueue();
-
- /**
- * This stores the TransactionProxyCleanupPhantomReference instances statically, This is
- * necessary because PhantomReferences need a hard reference so they're not garbage collected.
- * Once finalized, the TransactionProxyCleanupPhantomReference removes itself from this map
- * and thus becomes eligible for garbage collection.
- */
- private static final Map<TransactionProxyCleanupPhantomReference,
- TransactionProxyCleanupPhantomReference> phantomReferenceCache =
- new ConcurrentHashMap<>();
-
- /**
- * A PhantomReference that closes remote transactions for a TransactionProxy when it's
- * garbage collected. This is used for read-only transactions as they're not explicitly closed
- * by clients. So the only way to detect that a transaction is no longer in use and it's safe
- * to clean up is when it's garbage collected. It's inexact as to when an instance will be GC'ed
- * but TransactionProxy instances should generally be short-lived enough to avoid being moved
- * to the old generation space and thus should be cleaned up in a timely manner as the GC
- * runs on the young generation (eden, swap1...) space much more frequently.
- */
- private static class TransactionProxyCleanupPhantomReference
- extends FinalizablePhantomReference<TransactionProxy> {
-
- private final List<ActorSelection> remoteTransactionActors;
- private final AtomicBoolean remoteTransactionActorsMB;
- private final ActorContext actorContext;
- private final TransactionIdentifier identifier;
-
- protected TransactionProxyCleanupPhantomReference(TransactionProxy referent) {
- super(referent, phantomReferenceQueue);
-
- // Note we need to cache the relevant fields from the TransactionProxy as we can't
- // have a hard reference to the TransactionProxy instance itself.
-
- remoteTransactionActors = referent.remoteTransactionActors;
- remoteTransactionActorsMB = referent.remoteTransactionActorsMB;
- actorContext = referent.actorContext;
- identifier = referent.identifier;
- }
+ LOG.debug("New {} Tx - {}", type, getIdentifier());
+ }
- @Override
- public void finalizeReferent() {
- LOG.trace("Cleaning up {} Tx actors for TransactionProxy {}",
- remoteTransactionActors.size(), identifier);
+ @Override
+ public CheckedFuture<Boolean, ReadFailedException> exists(final YangInstanceIdentifier path) {
+ Preconditions.checkState(type != TransactionType.WRITE_ONLY, "Reads from write-only transactions are not allowed");
- phantomReferenceCache.remove(this);
+ LOG.debug("Tx {} exists {}", getIdentifier(), path);
- // Access the memory barrier volatile to ensure all previous updates to the
- // remoteTransactionActors list are visible to this thread.
+ throttleOperation();
- if(remoteTransactionActorsMB.get()) {
- for(ActorSelection actor : remoteTransactionActors) {
- LOG.trace("Sending CloseTransaction to {}", actor);
- actorContext.sendOperationAsync(actor,
- new CloseTransaction().toSerializable());
- }
+ final SettableFuture<Boolean> proxyFuture = SettableFuture.create();
+ TransactionContextWrapper contextAdapter = getContextAdapter(path);
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(TransactionContext transactionContext) {
+ transactionContext.dataExists(path, proxyFuture);
}
- }
- }
+ });
- /**
- * Stores the remote Tx actors for each requested data store path to be used by the
- * PhantomReference to close the remote Tx's. This is only used for read-only Tx's. The
- * remoteTransactionActorsMB volatile serves as a memory barrier to publish updates to the
- * remoteTransactionActors list so they will be visible to the thread accessing the
- * PhantomReference.
- */
- private List<ActorSelection> remoteTransactionActors;
- private AtomicBoolean remoteTransactionActorsMB;
-
- /**
- * Stores the create transaction results per shard.
- */
- private final Map<String, TransactionFutureCallback> txFutureCallbackMap = new HashMap<>();
-
- private final TransactionType transactionType;
- private final ActorContext actorContext;
- private final TransactionIdentifier identifier;
- private final TransactionChainProxy transactionChainProxy;
- private final SchemaContext schemaContext;
- private boolean inReadyState;
-
- public TransactionProxy(ActorContext actorContext, TransactionType transactionType) {
- this(actorContext, transactionType, null);
+ return MappingCheckedFuture.create(proxyFuture, ReadFailedException.MAPPER);
}
- public TransactionProxy(ActorContext actorContext, TransactionType transactionType,
- TransactionChainProxy transactionChainProxy) {
- this.actorContext = Preconditions.checkNotNull(actorContext,
- "actorContext should not be null");
- this.transactionType = Preconditions.checkNotNull(transactionType,
- "transactionType should not be null");
- this.schemaContext = Preconditions.checkNotNull(actorContext.getSchemaContext(),
- "schemaContext should not be null");
- this.transactionChainProxy = transactionChainProxy;
-
- String memberName = actorContext.getCurrentMemberName();
- if(memberName == null){
- memberName = "UNKNOWN-MEMBER";
- }
-
- this.identifier = TransactionIdentifier.builder().memberName(memberName).counter(
- counter.getAndIncrement()).build();
+ @Override
+ public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final YangInstanceIdentifier path) {
+ Preconditions.checkState(type != TransactionType.WRITE_ONLY, "Reads from write-only transactions are not allowed");
- if(transactionType == TransactionType.READ_ONLY) {
- // Read-only Tx's aren't explicitly closed by the client so we create a PhantomReference
- // to close the remote Tx's when this instance is no longer in use and is garbage
- // collected.
+ LOG.debug("Tx {} read {}", getIdentifier(), path);
- remoteTransactionActors = Lists.newArrayList();
- remoteTransactionActorsMB = new AtomicBoolean();
+ if (YangInstanceIdentifier.EMPTY.equals(path)) {
+ return readAllData();
+ } else {
+ throttleOperation();
- TransactionProxyCleanupPhantomReference cleanup =
- new TransactionProxyCleanupPhantomReference(this);
- phantomReferenceCache.put(cleanup, cleanup);
+ return singleShardRead(shardNameFromIdentifier(path), path);
}
-
- LOG.debug("Created txn {} of type {}", identifier, transactionType);
}
- @VisibleForTesting
- List<Future<Object>> getRecordedOperationFutures() {
- List<Future<Object>> recordedOperationFutures = Lists.newArrayList();
- for(TransactionFutureCallback txFutureCallback : txFutureCallbackMap.values()) {
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
- if(transactionContext != null) {
- recordedOperationFutures.addAll(transactionContext.getRecordedOperationFutures());
+ private CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> singleShardRead(
+ final String shardName, final YangInstanceIdentifier path) {
+ final SettableFuture<Optional<NormalizedNode<?, ?>>> proxyFuture = SettableFuture.create();
+ TransactionContextWrapper contextAdapter = getContextAdapter(shardName);
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(TransactionContext transactionContext) {
+ transactionContext.readData(path, proxyFuture);
}
- }
+ });
- return recordedOperationFutures;
+ return MappingCheckedFuture.create(proxyFuture, ReadFailedException.MAPPER);
}
- @Override
- public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(
- final YangInstanceIdentifier path) {
-
- Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
- "Read operation on write-only transaction is not allowed");
+ private CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readAllData() {
+ final Set<String> allShardNames = txContextFactory.getActorContext().getConfiguration().getAllShardNames();
+ final Collection<CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException>> futures = new ArrayList<>(allShardNames.size());
- LOG.debug("Tx {} read {}", identifier, path);
+ for (String shardName : allShardNames) {
+ futures.add(singleShardRead(shardName, YangInstanceIdentifier.EMPTY));
+ }
- TransactionFutureCallback txFutureCallback = getOrCreateTxFutureCallback(path);
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
+ final ListenableFuture<List<Optional<NormalizedNode<?, ?>>>> listFuture = Futures.allAsList(futures);
+ final ListenableFuture<Optional<NormalizedNode<?, ?>>> aggregateFuture;
- CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> future;
- if(transactionContext != null) {
- future = transactionContext.readData(path);
- } else {
- // The shard Tx hasn't been created yet so add the Tx operation to the Tx Future
- // callback to be executed after the Tx is created.
- final SettableFuture<Optional<NormalizedNode<?, ?>>> proxyFuture = SettableFuture.create();
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
- @Override
- public void invoke(TransactionContext transactionContext) {
- Futures.addCallback(transactionContext.readData(path),
- new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
- @Override
- public void onSuccess(Optional<NormalizedNode<?, ?>> data) {
- proxyFuture.set(data);
- }
-
- @Override
- public void onFailure(Throwable t) {
- proxyFuture.setException(t);
- }
- });
+ aggregateFuture = Futures.transform(listFuture, new Function<List<Optional<NormalizedNode<?, ?>>>, Optional<NormalizedNode<?, ?>>>() {
+ @Override
+ public Optional<NormalizedNode<?, ?>> apply(final List<Optional<NormalizedNode<?, ?>>> input) {
+ try {
+ return NormalizedNodeAggregator.aggregate(YangInstanceIdentifier.EMPTY, input, txContextFactory.getActorContext().getSchemaContext());
+ } catch (DataValidationFailedException e) {
+ throw new IllegalArgumentException("Failed to aggregate", e);
}
- });
-
- future = MappingCheckedFuture.create(proxyFuture, ReadFailedException.MAPPER);
- }
+ }
+ });
- return future;
+ return MappingCheckedFuture.create(aggregateFuture, ReadFailedException.MAPPER);
}
@Override
- public CheckedFuture<Boolean, ReadFailedException> exists(final YangInstanceIdentifier path) {
+ public void delete(final YangInstanceIdentifier path) {
+ checkModificationState();
- Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
- "Exists operation on write-only transaction is not allowed");
+ LOG.debug("Tx {} delete {}", getIdentifier(), path);
- LOG.debug("Tx {} exists {}", identifier, path);
+ throttleOperation();
- TransactionFutureCallback txFutureCallback = getOrCreateTxFutureCallback(path);
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
+ TransactionContextWrapper contextAdapter = getContextAdapter(path);
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(TransactionContext transactionContext) {
+ transactionContext.deleteData(path);
+ }
+ });
+ }
- CheckedFuture<Boolean, ReadFailedException> future;
- if(transactionContext != null) {
- future = transactionContext.dataExists(path);
- } else {
- // The shard Tx hasn't been created yet so add the Tx operation to the Tx Future
- // callback to be executed after the Tx is created.
- final SettableFuture<Boolean> proxyFuture = SettableFuture.create();
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
- @Override
- public void invoke(TransactionContext transactionContext) {
- Futures.addCallback(transactionContext.dataExists(path),
- new FutureCallback<Boolean>() {
- @Override
- public void onSuccess(Boolean exists) {
- proxyFuture.set(exists);
- }
-
- @Override
- public void onFailure(Throwable t) {
- proxyFuture.setException(t);
- }
- });
- }
- });
+ @Override
+ public void merge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
+ checkModificationState();
- future = MappingCheckedFuture.create(proxyFuture, ReadFailedException.MAPPER);
- }
+ LOG.debug("Tx {} merge {}", getIdentifier(), path);
- return future;
- }
+ throttleOperation();
- 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 not allowed");
+ TransactionContextWrapper contextAdapter = getContextAdapter(path);
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(TransactionContext transactionContext) {
+ transactionContext.mergeData(path, data);
+ }
+ });
}
@Override
public void write(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
-
checkModificationState();
- LOG.debug("Tx {} write {}", identifier, path);
-
- TransactionFutureCallback txFutureCallback = getOrCreateTxFutureCallback(path);
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
- if(transactionContext != null) {
- transactionContext.writeData(path, data);
- } else {
- // The shard Tx hasn't been created yet so add the Tx operation to the Tx Future
- // callback to be executed after the Tx is created.
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
- @Override
- public void invoke(TransactionContext transactionContext) {
- transactionContext.writeData(path, data);
- }
- });
- }
- }
+ LOG.debug("Tx {} write {}", getIdentifier(), path);
- @Override
- public void merge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
+ throttleOperation();
- checkModificationState();
+ TransactionContextWrapper contextAdapter = getContextAdapter(path);
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(TransactionContext transactionContext) {
+ transactionContext.writeData(path, data);
+ }
+ });
+ }
- LOG.debug("Tx {} merge {}", identifier, path);
+ private void checkModificationState() {
+ Preconditions.checkState(type != TransactionType.READ_ONLY,
+ "Modification operation on read-only transaction is not allowed");
+ Preconditions.checkState(state == TransactionState.OPEN,
+ "Transaction is sealed - further modifications are not allowed");
+ }
- TransactionFutureCallback txFutureCallback = getOrCreateTxFutureCallback(path);
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
- if(transactionContext != null) {
- transactionContext.mergeData(path, data);
+ private boolean seal(final TransactionState newState) {
+ if (state == TransactionState.OPEN) {
+ state = newState;
+ return true;
} else {
- // The shard Tx hasn't been created yet so add the Tx operation to the Tx Future
- // callback to be executed after the Tx is created.
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
- @Override
- public void invoke(TransactionContext transactionContext) {
- transactionContext.mergeData(path, data);
- }
- });
+ return false;
}
}
@Override
- public void delete(final YangInstanceIdentifier path) {
-
- checkModificationState();
-
- LOG.debug("Tx {} delete {}", identifier, path);
+ public final void close() {
+ if (!seal(TransactionState.CLOSED)) {
+ Preconditions.checkState(state == TransactionState.CLOSED, "Transaction %s is ready, it cannot be closed",
+ getIdentifier());
+ // Idempotent no-op as per AutoCloseable recommendation
+ return;
+ }
- TransactionFutureCallback txFutureCallback = getOrCreateTxFutureCallback(path);
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
- if(transactionContext != null) {
- transactionContext.deleteData(path);
- } else {
- // The shard Tx hasn't been created yet so add the Tx operation to the Tx Future
- // callback to be executed after the Tx is created.
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
+ for (TransactionContextWrapper contextAdapter : txContextAdapters.values()) {
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
@Override
public void invoke(TransactionContext transactionContext) {
- transactionContext.deleteData(path);
+ transactionContext.closeTransaction();
}
});
}
- }
-
- @Override
- public DOMStoreThreePhaseCommitCohort ready() {
-
- checkModificationState();
-
- inReadyState = true;
-
- LOG.debug("Tx {} Readying {} transactions for commit", identifier,
- txFutureCallbackMap.size());
-
- List<Future<ActorSelection>> cohortFutures = Lists.newArrayList();
-
- for(TransactionFutureCallback txFutureCallback : txFutureCallbackMap.values()) {
-
- LOG.debug("Tx {} Readying transaction for shard {}", identifier,
- txFutureCallback.getShardName());
-
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
- if(transactionContext != null) {
- cohortFutures.add(transactionContext.readyTransaction());
- } else {
- // The shard Tx hasn't been created yet so create a promise to ready the Tx later
- // after it's created.
- final Promise<ActorSelection> cohortPromise = akka.dispatch.Futures.promise();
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
- @Override
- public void invoke(TransactionContext transactionContext) {
- cohortPromise.completeWith(transactionContext.readyTransaction());
- }
- });
-
- cohortFutures.add(cohortPromise.future());
- }
- }
- if(transactionChainProxy != null){
- transactionChainProxy.onTransactionReady(cohortFutures);
- }
- return new ThreePhaseCommitCohortProxy(actorContext, cohortFutures,
- identifier.toString());
+ txContextAdapters.clear();
}
@Override
- public Object getIdentifier() {
- return this.identifier;
- }
+ public final AbstractThreePhaseCommitCohort<?> ready() {
+ Preconditions.checkState(type != TransactionType.READ_ONLY, "Read-only transactions cannot be readied");
- @Override
- public void close() {
- for(TransactionFutureCallback txFutureCallback : txFutureCallbackMap.values()) {
- TransactionContext transactionContext = txFutureCallback.getTransactionContext();
- if(transactionContext != null) {
- transactionContext.closeTransaction();
- } else {
- txFutureCallback.addTxOperationOnComplete(new TransactionOperation() {
- @Override
- public void invoke(TransactionContext transactionContext) {
- transactionContext.closeTransaction();
- }
- });
- }
- }
+ final boolean success = seal(TransactionState.READY);
+ Preconditions.checkState(success, "Transaction %s is %s, it cannot be readied", getIdentifier(), state);
- txFutureCallbackMap.clear();
+ LOG.debug("Tx {} Readying {} components for commit", getIdentifier(), txContextAdapters.size());
- if(transactionType == TransactionType.READ_ONLY) {
- remoteTransactionActors.clear();
- remoteTransactionActorsMB.set(true);
+ final AbstractThreePhaseCommitCohort<?> ret;
+ switch (txContextAdapters.size()) {
+ case 0:
+ ret = NoOpDOMStoreThreePhaseCommitCohort.INSTANCE;
+ break;
+ case 1:
+ final Entry<String, TransactionContextWrapper> e = Iterables.getOnlyElement(txContextAdapters.entrySet());
+ ret = createSingleCommitCohort(e.getKey(), e.getValue());
+ break;
+ default:
+ ret = createMultiCommitCohort(txContextAdapters.entrySet());
}
- }
- private String shardNameFromIdentifier(YangInstanceIdentifier path){
- return ShardStrategyFactory.getStrategy(path).findShard(path);
+ txContextFactory.onTransactionReady(getIdentifier(), ret.getCohortFutures());
+
+ final Throwable debugContext = getDebugContext();
+ return debugContext == null ? ret : new DebugThreePhaseCommitCohort(getIdentifier(), ret, debugContext);
}
- private TransactionFutureCallback getOrCreateTxFutureCallback(YangInstanceIdentifier path) {
- String shardName = shardNameFromIdentifier(path);
- TransactionFutureCallback txFutureCallback = txFutureCallbackMap.get(shardName);
- if(txFutureCallback == null) {
- Future<ActorSelection> findPrimaryFuture = actorContext.findPrimaryShardAsync(shardName);
+ private AbstractThreePhaseCommitCohort<?> createSingleCommitCohort(final String shardName,
+ final TransactionContextWrapper contextAdapter) {
+ throttleOperation();
- final TransactionFutureCallback newTxFutureCallback =
- new TransactionFutureCallback(shardName);
+ LOG.debug("Tx {} Readying transaction for shard {}", getIdentifier(), shardName);
- txFutureCallback = newTxFutureCallback;
- txFutureCallbackMap.put(shardName, txFutureCallback);
+ final OperationCallback.Reference operationCallbackRef =
+ new OperationCallback.Reference(OperationCallback.NO_OP_CALLBACK);
- findPrimaryFuture.onComplete(new OnComplete<ActorSelection>() {
+ final TransactionContext transactionContext = contextAdapter.getTransactionContext();
+ final Future future;
+ if (transactionContext == null) {
+ final Promise promise = akka.dispatch.Futures.promise();
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
@Override
- public void onComplete(Throwable failure, ActorSelection primaryShard) {
- if(failure != null) {
- newTxFutureCallback.onComplete(failure, null);
- } else {
- newTxFutureCallback.setPrimaryShard(primaryShard);
- }
+ public void invoke(TransactionContext transactionContext) {
+ promise.completeWith(getReadyOrDirectCommitFuture(transactionContext, operationCallbackRef));
}
- }, actorContext.getActorSystem().dispatcher());
+ });
+ future = promise.future();
+ } else {
+ // avoid the creation of a promise and a TransactionOperation
+ future = getReadyOrDirectCommitFuture(transactionContext, operationCallbackRef);
}
- return txFutureCallback;
+ return new SingleCommitCohortProxy(txContextFactory.getActorContext(), future, getIdentifier().toString(),
+ operationCallbackRef);
}
- public String getTransactionChainId() {
- if(transactionChainProxy == null){
- return "";
+ private Future<?> getReadyOrDirectCommitFuture(TransactionContext transactionContext,
+ OperationCallback.Reference operationCallbackRef) {
+ if (transactionContext.supportsDirectCommit()) {
+ TransactionRateLimitingCallback rateLimitingCallback = new TransactionRateLimitingCallback(
+ txContextFactory.getActorContext());
+ operationCallbackRef.set(rateLimitingCallback);
+ rateLimitingCallback.run();
+ return transactionContext.directCommit();
+ } else {
+ return transactionContext.readyTransaction();
}
- return transactionChainProxy.getTransactionChainId();
- }
-
- /**
- * Interface for a transaction operation to be invoked later.
- */
- private static interface TransactionOperation {
- void invoke(TransactionContext transactionContext);
}
- /**
- * Implements a Future OnComplete callback for a CreateTransaction message. This class handles
- * retries, up to a limit, if the shard doesn't have a leader yet. This is done by scheduling a
- * retry task after a short delay.
- * <p>
- * The end result from a completed CreateTransaction message is a TransactionContext that is
- * used to perform transaction operations. Transaction operations that occur before the
- * CreateTransaction completes are cache and executed once the CreateTransaction completes,
- * successfully or not.
- */
- private class TransactionFutureCallback extends OnComplete<Object> {
-
- /**
- * The list of transaction operations to execute once the CreateTransaction completes.
- */
- @GuardedBy("txOperationsOnComplete")
- private final List<TransactionOperation> txOperationsOnComplete = Lists.newArrayList();
-
- /**
- * The TransactionContext resulting from the CreateTransaction reply.
- */
- private volatile TransactionContext transactionContext;
-
- /**
- * The target primary shard.
- */
- private volatile ActorSelection primaryShard;
-
- private volatile int createTxTries = (int) (actorContext.getDatastoreContext().
- getShardLeaderElectionTimeout().duration().toMillis() /
- CREATE_TX_TRY_INTERVAL.toMillis());
-
- private final String shardName;
-
- TransactionFutureCallback(String shardName) {
- this.shardName = shardName;
- }
-
- String getShardName() {
- return shardName;
- }
-
- TransactionContext getTransactionContext() {
- return transactionContext;
- }
-
-
- /**
- * Sets the target primary shard and initiates a CreateTransaction try.
- */
- void setPrimaryShard(ActorSelection primaryShard) {
- LOG.debug("Tx {} Primary shard found - trying create transaction", identifier);
-
- this.primaryShard = primaryShard;
- tryCreateTransaction();
- }
-
- /**
- * Adds a TransactionOperation to be executed after the CreateTransaction completes.
- */
- void addTxOperationOnComplete(TransactionOperation operation) {
- synchronized(txOperationsOnComplete) {
- if(transactionContext == null) {
- LOG.debug("Tx {} Adding operation on complete {}", identifier);
-
- txOperationsOnComplete.add(operation);
- } else {
- operation.invoke(transactionContext);
- }
- }
- }
+ private AbstractThreePhaseCommitCohort<ActorSelection> createMultiCommitCohort(
+ final Set<Entry<String, TransactionContextWrapper>> txContextAdapterEntries) {
- /**
- * Performs a CreateTransaction try async.
- */
- private void tryCreateTransaction() {
- Future<Object> createTxFuture = actorContext.executeOperationAsync(primaryShard,
- new CreateTransaction(identifier.toString(),
- TransactionProxy.this.transactionType.ordinal(),
- getTransactionChainId()).toSerializable());
+ throttleOperation();
+ final List<Future<ActorSelection>> cohortFutures = new ArrayList<>(txContextAdapterEntries.size());
+ for (Entry<String, TransactionContextWrapper> e : txContextAdapterEntries) {
+ LOG.debug("Tx {} Readying transaction for shard {}", getIdentifier(), e.getKey());
- createTxFuture.onComplete(this, actorContext.getActorSystem().dispatcher());
- }
+ TransactionContextWrapper contextAdapter = e.getValue();
+ final TransactionContext transactionContext = contextAdapter.getTransactionContext();
+ Future<ActorSelection> future;
+ if (transactionContext != null) {
+ // avoid the creation of a promise and a TransactionOperation
+ future = transactionContext.readyTransaction();
+ } else {
+ final Promise<ActorSelection> promise = akka.dispatch.Futures.promise();
+ contextAdapter.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(TransactionContext transactionContext) {
+ promise.completeWith(transactionContext.readyTransaction());
+ }
+ });
- @Override
- public void onComplete(Throwable failure, Object response) {
- if(failure instanceof NoShardLeaderException) {
- // There's no leader for the shard yet - schedule and try again, unless we're out
- // of retries. Note: createTxTries is volatile as it may be written by different
- // threads however not concurrently, therefore decrementing it non-atomically here
- // is ok.
- if(--createTxTries > 0) {
- LOG.debug("Tx {} Shard {} has no leader yet - scheduling create Tx retry",
- identifier, shardName);
-
- actorContext.getActorSystem().scheduler().scheduleOnce(CREATE_TX_TRY_INTERVAL,
- new Runnable() {
- @Override
- public void run() {
- tryCreateTransaction();
- }
- }, actorContext.getActorSystem().dispatcher());
- return;
- }
+ future = promise.future();
}
- // Create the TransactionContext from the response or failure and execute delayed
- // TransactionOperations. This entire section is done atomically (ie synchronized) with
- // respect to #addTxOperationOnComplete to handle timing issues and ensure no
- // TransactionOperation is missed and that they are processed in the order they occurred.
- synchronized(txOperationsOnComplete) {
- if(failure != null) {
- LOG.debug("Tx {} Creating NoOpTransaction because of error: {}", identifier,
- failure.getMessage());
-
- transactionContext = new NoOpTransactionContext(failure, identifier);
- } else if (response.getClass().equals(CreateTransactionReply.SERIALIZABLE_CLASS)) {
- createValidTransactionContext(CreateTransactionReply.fromSerializable(response));
- } else {
- IllegalArgumentException exception = new IllegalArgumentException(String.format(
- "Invalid reply type %s for CreateTransaction", response.getClass()));
-
- transactionContext = new NoOpTransactionContext(exception, identifier);
- }
-
- for(TransactionOperation oper: txOperationsOnComplete) {
- oper.invoke(transactionContext);
- }
-
- txOperationsOnComplete.clear();
- }
+ cohortFutures.add(future);
}
- private void createValidTransactionContext(CreateTransactionReply reply) {
- String transactionPath = reply.getTransactionPath();
-
- LOG.debug("Tx {} Received transaction actor path {}", identifier, transactionPath);
-
- ActorSelection transactionActor = actorContext.actorSelection(transactionPath);
-
- if (transactionType == TransactionType.READ_ONLY) {
- // Add the actor to the remoteTransactionActors list for access by the
- // cleanup PhantonReference.
- remoteTransactionActors.add(transactionActor);
-
- // Write to the memory barrier volatile to publish the above update to the
- // remoteTransactionActors list for thread visibility.
- remoteTransactionActorsMB.set(true);
- }
-
- // TxActor is always created where the leader of the shard is.
- // Check if TxActor is created in the same node
- boolean isTxActorLocal = actorContext.isLocalPath(transactionPath);
-
- transactionContext = new TransactionContextImpl(transactionActor, identifier,
- actorContext, schemaContext, isTxActorLocal);
- }
+ return new ThreePhaseCommitCohortProxy(txContextFactory.getActorContext(), cohortFutures, getIdentifier().toString());
}
- private interface TransactionContext {
- void closeTransaction();
-
- Future<ActorSelection> 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 static String shardNameFromIdentifier(final YangInstanceIdentifier path) {
+ return ShardStrategyFactory.getStrategy(path).findShard(path);
}
- private static abstract class AbstractTransactionContext implements TransactionContext {
-
- protected final TransactionIdentifier identifier;
- protected final List<Future<Object>> recordedOperationFutures = Lists.newArrayList();
-
- AbstractTransactionContext(TransactionIdentifier identifier) {
- this.identifier = identifier;
- }
-
- @Override
- public List<Future<Object>> getRecordedOperationFutures() {
- return recordedOperationFutures;
- }
+ private TransactionContextWrapper getContextAdapter(final YangInstanceIdentifier path) {
+ return getContextAdapter(shardNameFromIdentifier(path));
}
- private static class TransactionContextImpl extends AbstractTransactionContext {
- private final Logger LOG = LoggerFactory.getLogger(TransactionContextImpl.class);
-
- private final ActorContext actorContext;
- private final SchemaContext schemaContext;
- private final ActorSelection actor;
- private final boolean isTxActorLocal;
-
- private TransactionContextImpl(ActorSelection actor, TransactionIdentifier identifier,
- ActorContext actorContext, SchemaContext schemaContext,
- boolean isTxActorLocal) {
- super(identifier);
- this.actor = actor;
- this.actorContext = actorContext;
- this.schemaContext = schemaContext;
- this.isTxActorLocal = isTxActorLocal;
- }
-
- private ActorSelection getActor() {
- return actor;
- }
-
- @Override
- public void closeTransaction() {
- LOG.debug("Tx {} closeTransaction called", identifier);
-
- actorContext.sendOperationAsync(getActor(), new CloseTransaction().toSerializable());
+ private TransactionContextWrapper getContextAdapter(final String shardName) {
+ final TransactionContextWrapper existing = txContextAdapters.get(shardName);
+ if (existing != null) {
+ return existing;
}
- @Override
- public Future<ActorSelection> readyTransaction() {
- LOG.debug("Tx {} readyTransaction called with {} previous recorded operations pending",
- identifier, recordedOperationFutures.size());
-
- // Send the ReadyTransaction message to the Tx actor.
-
- ReadyTransaction readyTransaction = new ReadyTransaction();
- final Future<Object> replyFuture = actorContext.executeOperationAsync(getActor(),
- isTxActorLocal ? readyTransaction : readyTransaction.toSerializable());
-
- // 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 Mapper<Iterable<Object>, ActorSelection>() {
- @Override
- public ActorSelection checkedApply(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 instanceof ReadyTransactionReply) {
- return actorContext.actorSelection(((ReadyTransactionReply)serializedReadyReply).getCohortPath());
-
- } else if(serializedReadyReply.getClass().equals(ReadyTransactionReply.SERIALIZABLE_CLASS)) {
- ReadyTransactionReply reply = ReadyTransactionReply.fromSerializable(serializedReadyReply);
- return actorContext.actorSelection(reply.getCohortPath());
-
- } 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());
- }
+ final TransactionContextWrapper fresh = txContextFactory.newTransactionAdapter(this, shardName);
+ txContextAdapters.put(shardName, fresh);
+ return fresh;
+ }
- @Override
- public void deleteData(YangInstanceIdentifier path) {
- LOG.debug("Tx {} deleteData called path = {}", identifier, path);
+ TransactionType getType() {
+ return type;
+ }
- DeleteData deleteData = new DeleteData(path);
- recordedOperationFutures.add(actorContext.executeOperationAsync(getActor(),
- isTxActorLocal ? deleteData : deleteData.toSerializable()));
- }
+ boolean isReady() {
+ return state != TransactionState.OPEN;
+ }
- @Override
- public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
- LOG.debug("Tx {} mergeData called path = {}", identifier, path);
+ ActorContext getActorContext() {
+ return txContextFactory.getActorContext();
+ }
- MergeData mergeData = new MergeData(path, data, schemaContext);
- recordedOperationFutures.add(actorContext.executeOperationAsync(getActor(),
- isTxActorLocal ? mergeData : mergeData.toSerializable()));
+ OperationCompleter getCompleter() {
+ OperationCompleter ret = operationCompleter;
+ if (ret == null) {
+ final Semaphore s = getLimiter();
+ ret = new OperationCompleter(s);
+ operationCompleter = ret;
}
- @Override
- public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
- LOG.debug("Tx {} writeData called path = {}", identifier, path);
+ return ret;
+ }
- WriteData writeData = new WriteData(path, data, schemaContext);
- recordedOperationFutures.add(actorContext.executeOperationAsync(getActor(),
- isTxActorLocal ? writeData : writeData.toSerializable()));
+ Semaphore getLimiter() {
+ Semaphore ret = operationLimiter;
+ if (ret == null) {
+ // Note : Currently mailbox-capacity comes from akka.conf and not from the config-subsystem
+ ret = new Semaphore(getActorContext().getTransactionOutstandingOperationLimit());
+ operationLimiter = ret;
}
+ return ret;
+ }
- @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);
- }
- }
- };
+ void throttleOperation() {
+ throttleOperation(1);
+ }
- combinedFutures.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
+ private void throttleOperation(int acquirePermits) {
+ try {
+ if (!getLimiter().tryAcquire(acquirePermits,
+ getActorContext().getDatastoreContext().getOperationTimeoutInSeconds(), TimeUnit.SECONDS)){
+ LOG.warn("Failed to acquire operation permit for transaction {}", getIdentifier());
}
-
- 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 instanceof ReadDataReply) {
- ReadDataReply reply = (ReadDataReply) readResponse;
- returnFuture.set(Optional.<NormalizedNode<?, ?>>fromNullable(reply.getNormalizedNode()));
-
- } else if (readResponse.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)) {
- ReadDataReply reply = ReadDataReply.fromSerializable(schemaContext, path, readResponse);
- returnFuture.set(Optional.<NormalizedNode<?, ?>>fromNullable(reply.getNormalizedNode()));
-
- } else {
- returnFuture.setException(new ReadFailedException(
- "Invalid response reading data for path " + path));
- }
- }
- }
- };
-
- ReadData readData = new ReadData(path);
- Future<Object> readFuture = actorContext.executeOperationAsync(getActor(),
- isTxActorLocal ? readData : readData.toSerializable());
-
- 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);
+ } catch (InterruptedException e) {
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Interrupted when trying to acquire operation permit for transaction {}", getIdentifier(), e);
} 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());
+ LOG.warn("Interrupted when trying to acquire operation permit for transaction {}", getIdentifier());
}
-
- 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 instanceof DataExistsReply) {
- returnFuture.set(Boolean.valueOf(((DataExistsReply) response).exists()));
-
- } 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));
- }
- }
- }
- };
-
- DataExists dataExists = new DataExists(path);
- Future<Object> future = actorContext.executeOperationAsync(getActor(),
- isTxActorLocal ? dataExists : dataExists.toSerializable());
-
- future.onComplete(onComplete, actorContext.getActorSystem().dispatcher());
- }
- }
-
- private static class NoOpTransactionContext extends AbstractTransactionContext {
-
- private final Logger LOG = LoggerFactory.getLogger(NoOpTransactionContext.class);
-
- private final Throwable failure;
-
- public NoOpTransactionContext(Throwable failure, TransactionIdentifier identifier){
- super(identifier);
- this.failure = failure;
- }
-
- @Override
- public void closeTransaction() {
- LOG.debug("NoOpTransactionContext {} closeTransaction called", identifier);
- }
-
- @Override
- public Future<ActorSelection> 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));
}
}
}