X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FTransactionProxy.java;h=43bf09eb8aceee72089911717bd8d6b5e6c2c556;hb=2dedb8231e13abe55d6b75eb532d23dbe536e168;hp=715f48c3492156d1b14005462da2c26aacb1768c;hpb=c36bb2bc93ea0fbdd3ca8b2663447fc921450aee;p=controller.git
diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java
index 715f48c349..43bf09eb8a 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/TransactionProxy.java
@@ -5,862 +5,324 @@
* 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.OnComplete;
+import static com.google.common.base.Preconditions.checkState;
+import static java.util.Objects.requireNonNull;
+import akka.actor.ActorSelection;
import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.FinalizablePhantomReference;
-import com.google.common.base.FinalizableReferenceQueue;
-import com.google.common.base.Optional;
-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.collect.Iterables;
+import com.google.common.util.concurrent.FluentFuture;
import com.google.common.util.concurrent.SettableFuture;
-
-import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
-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 java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Optional;
+import java.util.SortedSet;
+import java.util.TreeMap;
+import java.util.TreeSet;
+import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
+import org.opendaylight.controller.cluster.datastore.TransactionModificationOperation.DeleteOperation;
+import org.opendaylight.controller.cluster.datastore.TransactionModificationOperation.MergeOperation;
+import org.opendaylight.controller.cluster.datastore.TransactionModificationOperation.WriteOperation;
+import org.opendaylight.controller.cluster.datastore.messages.AbstractRead;
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.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.util.concurrent.MappingCheckedFuture;
+import org.opendaylight.controller.cluster.datastore.utils.ActorUtils;
+import org.opendaylight.controller.cluster.datastore.utils.RootScatterGather;
+import org.opendaylight.mdsal.dom.spi.store.AbstractDOMStoreTransaction;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreReadWriteTransaction;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
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.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicLong;
+import scala.concurrent.Promise;
/**
- * TransactionProxy acts as a proxy for one or more transactions that were created on a remote shard
- *
- * 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
- *
- *
- * The TransactionProxy does not make any guarantees about atomicity or order in which the transactions on the various
- * shards will be executed.
- *
+ * A transaction potentially spanning multiple backend shards.
*/
-public class TransactionProxy implements DOMStoreReadWriteTransaction {
-
- private final TransactionChainProxy transactionChainProxy;
-
-
-
- public enum TransactionType {
- READ_ONLY,
- WRITE_ONLY,
- READ_WRITE
+public class TransactionProxy extends AbstractDOMStoreTransaction
+ implements DOMStoreReadWriteTransaction {
+ private enum TransactionState {
+ OPEN,
+ READY,
+ CLOSED,
}
- static Function1 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);
-
-
- /**
- * 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 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 {
-
- private final List 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;
- }
-
- @Override
- public void finalizeReferent() {
- LOG.trace("Cleaning up {} Tx actors for TransactionProxy {}",
- remoteTransactionActors.size(), identifier);
+ private static final Logger LOG = LoggerFactory.getLogger(TransactionProxy.class);
+ private static final DeleteOperation ROOT_DELETE_OPERATION = new DeleteOperation(YangInstanceIdentifier.empty());
- phantomReferenceCache.remove(this);
-
- // Access the memory barrier volatile to ensure all previous updates to the
- // remoteTransactionActors list are visible to this thread.
-
- if(remoteTransactionActorsMB.get()) {
- for(ActorSelection actor : remoteTransactionActors) {
- LOG.trace("Sending CloseTransaction to {}", actor);
- actorContext.sendOperationAsync(actor,
- new CloseTransaction().toSerializable());
- }
- }
- }
- }
-
- /**
- * 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 remoteTransactionActors;
- private AtomicBoolean remoteTransactionActorsMB;
-
- private final Map remoteTransactionPaths = new HashMap<>();
-
- private final TransactionType transactionType;
- private final ActorContext actorContext;
- private final TransactionIdentifier identifier;
- private final SchemaContext schemaContext;
- private boolean inReadyState;
-
- public TransactionProxy(ActorContext actorContext, TransactionType transactionType) {
- this(actorContext, transactionType, null);
- }
+ private final Map txContextWrappers = new TreeMap<>();
+ private final AbstractTransactionContextFactory> txContextFactory;
+ private final TransactionType type;
+ private TransactionState state = TransactionState.OPEN;
@VisibleForTesting
- List> getRecordedOperationFutures() {
- List> recordedOperationFutures = Lists.newArrayList();
- for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
- recordedOperationFutures.addAll(transactionContext.getRecordedOperationFutures());
- }
+ public TransactionProxy(final AbstractTransactionContextFactory> txContextFactory, final TransactionType type) {
+ super(txContextFactory.nextIdentifier(), txContextFactory.getActorUtils().getDatastoreContext()
+ .isTransactionDebugContextEnabled());
+ this.txContextFactory = txContextFactory;
+ this.type = requireNonNull(type);
- return recordedOperationFutures;
+ LOG.debug("New {} Tx - {}", type, getIdentifier());
}
- 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();
-
- 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.
-
- remoteTransactionActors = Lists.newArrayList();
- remoteTransactionActorsMB = new AtomicBoolean();
-
- TransactionProxyCleanupPhantomReference cleanup =
- new TransactionProxyCleanupPhantomReference(this);
- phantomReferenceCache.put(cleanup, cleanup);
- }
- if(LOG.isDebugEnabled()) {
- LOG.debug("Created txn {} of type {}", identifier, transactionType);
- }
+ @Override
+ public FluentFuture exists(final YangInstanceIdentifier path) {
+ return executeRead(shardNameFromIdentifier(path), new DataExists(path, DataStoreVersions.CURRENT_VERSION));
}
- @Override
- public CheckedFuture>, ReadFailedException> read(
- final YangInstanceIdentifier path) {
+ private FluentFuture executeRead(final String shardName, final AbstractRead readCmd) {
+ checkState(type != TransactionType.WRITE_ONLY, "Reads from write-only transactions are not allowed");
- Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
- "Read operation on write-only transaction is not allowed");
+ LOG.trace("Tx {} {} {}", getIdentifier(), readCmd.getClass().getSimpleName(), readCmd.getPath());
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} read {}", identifier, path);
- }
- createTransactionIfMissing(actorContext, path);
+ final SettableFuture proxyFuture = SettableFuture.create();
+ AbstractTransactionContextWrapper contextWrapper = wrapperFromShardName(shardName);
+ contextWrapper.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(final TransactionContext transactionContext, final Boolean havePermit) {
+ transactionContext.executeRead(readCmd, proxyFuture, havePermit);
+ }
+ });
- return transactionContext(path).readData(path);
+ return FluentFuture.from(proxyFuture);
}
@Override
- public CheckedFuture exists(YangInstanceIdentifier path) {
+ public FluentFuture> read(final YangInstanceIdentifier path) {
+ checkState(type != TransactionType.WRITE_ONLY, "Reads from write-only transactions are not allowed");
+ requireNonNull(path, "path should not be null");
- Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
- "Exists operation on write-only transaction is not allowed");
-
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} exists {}", identifier, path);
- }
- createTransactionIfMissing(actorContext, path);
-
- return transactionContext(path).dataExists(path);
+ LOG.trace("Tx {} read {}", getIdentifier(), path);
+ return path.isEmpty() ? readAllData() : singleShardRead(shardNameFromIdentifier(path), 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 not allowed");
+ private FluentFuture> singleShardRead(final String shardName,
+ final YangInstanceIdentifier path) {
+ return executeRead(shardName, new ReadData(path, DataStoreVersions.CURRENT_VERSION));
}
- @Override
- public void write(YangInstanceIdentifier path, NormalizedNode, ?> data) {
-
- checkModificationState();
-
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} write {}", identifier, path);
- }
- createTransactionIfMissing(actorContext, path);
-
- transactionContext(path).writeData(path, data);
+ private FluentFuture> readAllData() {
+ final var actorUtils = getActorUtils();
+ return RootScatterGather.gather(actorUtils, actorUtils.getConfiguration().getAllShardNames().stream()
+ .map(shardName -> singleShardRead(shardName, YangInstanceIdentifier.empty())));
}
@Override
- public void merge(YangInstanceIdentifier path, NormalizedNode, ?> data) {
-
- checkModificationState();
+ public void delete(final YangInstanceIdentifier path) {
+ checkModificationState("delete", path);
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} merge {}", identifier, path);
+ if (path.isEmpty()) {
+ deleteAllData();
+ } else {
+ executeModification(new DeleteOperation(path));
}
- createTransactionIfMissing(actorContext, path);
-
- transactionContext(path).mergeData(path, data);
}
- @Override
- public void delete(YangInstanceIdentifier path) {
-
- checkModificationState();
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} delete {}", identifier, path);
+ private void deleteAllData() {
+ for (String shardName : getActorUtils().getConfiguration().getAllShardNames()) {
+ wrapperFromShardName(shardName).maybeExecuteTransactionOperation(ROOT_DELETE_OPERATION);
}
- createTransactionIfMissing(actorContext, path);
-
- transactionContext(path).deleteData(path);
}
@Override
- public DOMStoreThreePhaseCommitCohort ready() {
-
- checkModificationState();
-
- inReadyState = true;
+ public void merge(final YangInstanceIdentifier path, final NormalizedNode data) {
+ checkModificationState("merge", path);
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} Trying to get {} transactions ready for commit", identifier,
- remoteTransactionPaths.size());
+ if (path.isEmpty()) {
+ mergeAllData(RootScatterGather.castRootNode(data));
+ } else {
+ executeModification(new MergeOperation(path, data));
}
- List> cohortFutures = Lists.newArrayList();
-
- for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
-
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} Readying transaction for shard {}", identifier,
- transactionContext.getShardName());
- }
- cohortFutures.add(transactionContext.readyTransaction());
- }
-
- if(transactionChainProxy != null){
- transactionChainProxy.onTransactionReady(cohortFutures);
- }
-
- return new ThreePhaseCommitCohortProxy(actorContext, cohortFutures,
- identifier.toString());
}
- @Override
- public Object getIdentifier() {
- return this.identifier;
+ private void mergeAllData(final ContainerNode rootData) {
+ if (!rootData.isEmpty()) {
+ RootScatterGather.scatterTouched(rootData, this::wrapperFromRootChild).forEach(
+ scattered -> scattered.shard().maybeExecuteTransactionOperation(
+ new MergeOperation(YangInstanceIdentifier.empty(), scattered.container())));
+ }
}
@Override
- public void close() {
- for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
- transactionContext.closeTransaction();
- }
+ public void write(final YangInstanceIdentifier path, final NormalizedNode data) {
+ checkModificationState("write", path);
- remoteTransactionPaths.clear();
-
- if(transactionType == TransactionType.READ_ONLY) {
- remoteTransactionActors.clear();
- remoteTransactionActorsMB.set(true);
+ if (path.isEmpty()) {
+ writeAllData(RootScatterGather.castRootNode(data));
+ } else {
+ executeModification(new WriteOperation(path, data));
}
}
- private TransactionContext transactionContext(YangInstanceIdentifier path){
- String shardName = shardNameFromIdentifier(path);
- return remoteTransactionPaths.get(shardName);
+ private void writeAllData(final ContainerNode rootData) {
+ RootScatterGather.scatterAll(rootData, this::wrapperFromRootChild,
+ getActorUtils().getConfiguration().getAllShardNames().stream().map(this::wrapperFromShardName)).forEach(
+ scattered -> scattered.shard().maybeExecuteTransactionOperation(
+ new WriteOperation(YangInstanceIdentifier.empty(), scattered.container())));
}
- private String shardNameFromIdentifier(YangInstanceIdentifier path){
- return ShardStrategyFactory.getStrategy(path).findShard(path);
+ private void executeModification(final TransactionModificationOperation operation) {
+ wrapperFromShardName(shardNameFromIdentifier(operation.path())).maybeExecuteTransactionOperation(operation);
}
- private void createTransactionIfMissing(ActorContext actorContext,
- YangInstanceIdentifier path) {
+ private void checkModificationState(final String opName, final YangInstanceIdentifier path) {
+ checkState(type != TransactionType.READ_ONLY, "Modification operation on read-only transaction is not allowed");
+ checkState(state == TransactionState.OPEN, "Transaction is sealed - further modifications are not allowed");
+ LOG.trace("Tx {} {} {}", getIdentifier(), opName, path);
+ }
- if(transactionChainProxy != null){
- transactionChainProxy.waitTillCurrentTransactionReady();
+ private boolean seal(final TransactionState newState) {
+ if (state == TransactionState.OPEN) {
+ state = newState;
+ return true;
}
+ return false;
+ }
- String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
-
- TransactionContext transactionContext =
- remoteTransactionPaths.get(shardName);
-
- if (transactionContext != null) {
- // A transaction already exists with that shard
+ @Override
+ public final void close() {
+ if (!seal(TransactionState.CLOSED)) {
+ checkState(state == TransactionState.CLOSED, "Transaction %s is ready, it cannot be closed",
+ getIdentifier());
+ // Idempotent no-op as per AutoCloseable recommendation
return;
}
- try {
- Optional primaryShard = actorContext.findPrimaryShard(shardName);
- if (!primaryShard.isPresent()) {
- throw new PrimaryNotFoundException("Primary could not be found for shard " + shardName);
- }
-
- Object response = actorContext.executeOperation(primaryShard.get(),
- new CreateTransaction(identifier.toString(), this.transactionType.ordinal(),
- getTransactionChainId()).toSerializable());
- if (response.getClass().equals(CreateTransactionReply.SERIALIZABLE_CLASS)) {
- CreateTransactionReply reply =
- CreateTransactionReply.fromSerializable(response);
-
- String transactionPath = reply.getTransactionPath();
-
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} Received transaction 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);
+ for (AbstractTransactionContextWrapper contextWrapper : txContextWrappers.values()) {
+ contextWrapper.maybeExecuteTransactionOperation(new TransactionOperation() {
+ @Override
+ public void invoke(final TransactionContext transactionContext, final Boolean havePermit) {
+ transactionContext.closeTransaction();
}
-
- // 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(shardName, transactionPath,
- transactionActor, identifier, actorContext, schemaContext, isTxActorLocal);
-
- remoteTransactionPaths.put(shardName, transactionContext);
- } else {
- throw new IllegalArgumentException(String.format(
- "Invalid reply type {} for CreateTransaction", response.getClass()));
- }
- } catch (Exception e) {
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} Creating NoOpTransaction because of : {}", identifier, e.getMessage());
- }
- remoteTransactionPaths
- .put(shardName, new NoOpTransactionContext(shardName, e, identifier));
+ });
}
- }
- public String getTransactionChainId() {
- if(transactionChainProxy == null){
- return "";
- }
- return transactionChainProxy.getTransactionChainId();
- }
-
-
- private interface TransactionContext {
- String getShardName();
-
- void closeTransaction();
-
- Future readyTransaction();
-
- void writeData(YangInstanceIdentifier path, NormalizedNode, ?> data);
- void deleteData(YangInstanceIdentifier path);
-
- void mergeData(YangInstanceIdentifier path, NormalizedNode, ?> data);
-
- CheckedFuture>, ReadFailedException> readData(
- final YangInstanceIdentifier path);
-
- CheckedFuture dataExists(YangInstanceIdentifier path);
-
- List> getRecordedOperationFutures();
+ txContextWrappers.clear();
}
- private static abstract class AbstractTransactionContext implements TransactionContext {
-
- protected final TransactionIdentifier identifier;
- protected final String shardName;
- protected final List> recordedOperationFutures = Lists.newArrayList();
-
- AbstractTransactionContext(String shardName, TransactionIdentifier identifier) {
- this.shardName = shardName;
- this.identifier = identifier;
- }
-
- @Override
- public String getShardName() {
- return shardName;
- }
-
- @Override
- public List> getRecordedOperationFutures() {
- return recordedOperationFutures;
- }
- }
+ @Override
+ public final AbstractThreePhaseCommitCohort> ready() {
+ checkState(type != TransactionType.READ_ONLY, "Read-only transactions cannot be readied");
- private static class TransactionContextImpl extends AbstractTransactionContext {
- private final Logger LOG = LoggerFactory.getLogger(TransactionContextImpl.class);
-
- private final ActorContext actorContext;
- private final SchemaContext schemaContext;
- private final String actorPath;
- private final ActorSelection actor;
- private final boolean isTxActorLocal;
-
- private TransactionContextImpl(String shardName, String actorPath,
- ActorSelection actor, TransactionIdentifier identifier, ActorContext actorContext,
- SchemaContext schemaContext, boolean isTxActorLocal) {
- super(shardName, identifier);
- this.actorPath = actorPath;
- this.actor = actor;
- this.actorContext = actorContext;
- this.schemaContext = schemaContext;
- this.isTxActorLocal = isTxActorLocal;
- }
+ final boolean success = seal(TransactionState.READY);
+ checkState(success, "Transaction %s is %s, it cannot be readied", getIdentifier(), state);
- private ActorSelection getActor() {
- return actor;
- }
+ LOG.debug("Tx {} Readying {} components for commit", getIdentifier(), txContextWrappers.size());
- @Override
- public void closeTransaction() {
- if(LOG.isDebugEnabled()) {
- LOG.debug("Tx {} closeTransaction called", identifier);
- }
- actorContext.sendOperationAsync(getActor(), new CloseTransaction().toSerializable());
+ final AbstractThreePhaseCommitCohort> ret;
+ switch (txContextWrappers.size()) {
+ case 0:
+ ret = NoOpDOMStoreThreePhaseCommitCohort.INSTANCE;
+ break;
+ case 1:
+ final Entry e = Iterables.getOnlyElement(
+ txContextWrappers.entrySet());
+ ret = createSingleCommitCohort(e.getKey(), e.getValue());
+ break;
+ default:
+ ret = createMultiCommitCohort();
}
- @Override
- public Future readyTransaction() {
- if(LOG.isDebugEnabled()) {
- 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