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=ec198510d3586f88dee40d04f9294a3fb370a9ae;hb=f9f6d8ed4b12e39386801f6b16b9485f5558336e;hp=6d7cbc86233543338a6b474a4a21035f33ecf770;hpb=39d81b37e75f8e38eab7ac1d6c606e704265fd9c;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 6d7cbc8623..ec198510d3 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
@@ -8,11 +8,12 @@
package org.opendaylight.controller.cluster.datastore;
-import akka.actor.ActorPath;
import akka.actor.ActorSelection;
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.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
@@ -20,6 +21,7 @@ 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.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;
@@ -52,6 +54,8 @@ 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;
/**
@@ -67,6 +71,11 @@ import java.util.concurrent.atomic.AtomicLong;
*
*/
public class TransactionProxy implements DOMStoreReadWriteTransaction {
+
+ private final TransactionChainProxy transactionChainProxy;
+
+
+
public enum TransactionType {
READ_ONLY,
WRITE_ONLY,
@@ -87,18 +96,113 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
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);
+
+ 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 Map 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");
+ public TransactionProxy(ActorContext actorContext, TransactionType transactionType) {
+ this(actorContext, transactionType, null);
+ }
+
+ @VisibleForTesting
+ List> getRecordedOperationFutures() {
+ List> recordedOperationFutures = Lists.newArrayList();
+ for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
+ recordedOperationFutures.addAll(transactionContext.getRecordedOperationFutures());
+ }
+
+ return recordedOperationFutures;
+ }
+
+ 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){
@@ -106,20 +210,23 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
}
this.identifier = TransactionIdentifier.builder().memberName(memberName).counter(
- counter.getAndIncrement()).build();
+ counter.getAndIncrement()).build();
- LOG.debug("Created txn {}", identifier);
+ 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();
- @VisibleForTesting
- List> getRecordedOperationFutures() {
- List> recordedOperationFutures = Lists.newArrayList();
- for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
- recordedOperationFutures.addAll(transactionContext.getRecordedOperationFutures());
+ TransactionProxyCleanupPhantomReference cleanup =
+ new TransactionProxyCleanupPhantomReference(this);
+ phantomReferenceCache.put(cleanup, cleanup);
+ }
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Created txn {} of type {}", identifier, transactionType);
}
-
- return recordedOperationFutures;
}
@Override
@@ -129,8 +236,9 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
"Read operation on write-only transaction is not allowed");
- LOG.debug("Tx {} read {}", identifier, path);
-
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} read {}", identifier, path);
+ }
createTransactionIfMissing(actorContext, path);
return transactionContext(path).readData(path);
@@ -142,8 +250,9 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
Preconditions.checkState(transactionType != TransactionType.WRITE_ONLY,
"Exists operation on write-only transaction is not allowed");
- LOG.debug("Tx {} exists {}", identifier, path);
-
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} exists {}", identifier, path);
+ }
createTransactionIfMissing(actorContext, path);
return transactionContext(path).dataExists(path);
@@ -153,7 +262,7 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
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");
+ "Transaction is sealed - further modifications are not allowed");
}
@Override
@@ -161,8 +270,9 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
checkModificationState();
- LOG.debug("Tx {} write {}", identifier, path);
-
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} write {}", identifier, path);
+ }
createTransactionIfMissing(actorContext, path);
transactionContext(path).writeData(path, data);
@@ -173,8 +283,9 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
checkModificationState();
- LOG.debug("Tx {} merge {}", identifier, path);
-
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} merge {}", identifier, path);
+ }
createTransactionIfMissing(actorContext, path);
transactionContext(path).mergeData(path, data);
@@ -184,9 +295,9 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
public void delete(YangInstanceIdentifier path) {
checkModificationState();
-
- LOG.debug("Tx {} delete {}", identifier, path);
-
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} delete {}", identifier, path);
+ }
createTransactionIfMissing(actorContext, path);
transactionContext(path).deleteData(path);
@@ -199,20 +310,26 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
inReadyState = true;
- LOG.debug("Tx {} Trying to get {} transactions ready for commit", identifier,
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} Trying to get {} transactions ready for commit", identifier,
remoteTransactionPaths.size());
-
- List> cohortPathFutures = Lists.newArrayList();
+ }
+ List> cohortFutures = Lists.newArrayList();
for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
- LOG.debug("Tx {} Readying transaction for shard {}", identifier,
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} Readying transaction for shard {}", identifier,
transactionContext.getShardName());
+ }
+ cohortFutures.add(transactionContext.readyTransaction());
+ }
- cohortPathFutures.add(transactionContext.readyTransaction());
+ if(transactionChainProxy != null){
+ transactionChainProxy.onTransactionReady(cohortFutures);
}
- return new ThreePhaseCommitCohortProxy(actorContext, cohortPathFutures,
+ return new ThreePhaseCommitCohortProxy(actorContext, cohortFutures,
identifier.toString());
}
@@ -226,6 +343,13 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
transactionContext.closeTransaction();
}
+
+ remoteTransactionPaths.clear();
+
+ if(transactionType == TransactionType.READ_ONLY) {
+ remoteTransactionActors.clear();
+ remoteTransactionActorsMB.set(true);
+ }
}
private TransactionContext transactionContext(YangInstanceIdentifier path){
@@ -237,52 +361,84 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
return ShardStrategyFactory.getStrategy(path).findShard(path);
}
- private void createTransactionIfMissing(ActorContext actorContext, YangInstanceIdentifier path) {
+ private void createTransactionIfMissing(ActorContext actorContext,
+ YangInstanceIdentifier path) {
+
+ if(transactionChainProxy != null){
+ transactionChainProxy.waitTillCurrentTransactionReady();
+ }
+
String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
TransactionContext transactionContext =
remoteTransactionPaths.get(shardName);
- if(transactionContext != null){
+ 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);
+ 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();
- LOG.debug("Tx {} Received transaction path = {}", identifier, transactionPath);
+ 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);
+ }
- ActorSelection transactionActor =
- actorContext.actorSelection(transactionPath);
- transactionContext =
- new TransactionContextImpl(shardName, transactionPath,
- transactionActor);
+ transactionContext = new TransactionContextImpl(shardName, transactionPath,
+ transactionActor, identifier, actorContext, schemaContext);
remoteTransactionPaths.put(shardName, transactionContext);
} else {
throw new IllegalArgumentException(String.format(
- "Invalid reply type {} for CreateTransaction", response.getClass()));
+ "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));
+ } 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();
+ Future readyTransaction();
void writeData(YangInstanceIdentifier path, NormalizedNode, ?> data);
@@ -298,13 +454,15 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
List> getRecordedOperationFutures();
}
- private abstract class AbstractTransactionContext implements TransactionContext {
+ private static abstract class AbstractTransactionContext implements TransactionContext {
+ protected final TransactionIdentifier identifier;
protected final String shardName;
protected final List> recordedOperationFutures = Lists.newArrayList();
- AbstractTransactionContext(String shardName) {
+ AbstractTransactionContext(String shardName, TransactionIdentifier identifier) {
this.shardName = shardName;
+ this.identifier = identifier;
}
@Override
@@ -318,42 +476,46 @@ public class TransactionProxy implements DOMStoreReadWriteTransaction {
}
}
- private class TransactionContextImpl extends AbstractTransactionContext {
+ 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 TransactionContextImpl(String shardName, String actorPath,
- ActorSelection actor) {
- super(shardName);
+ ActorSelection actor, TransactionIdentifier identifier, ActorContext actorContext,
+ SchemaContext schemaContext) {
+ super(shardName, identifier);
this.actorPath = actorPath;
this.actor = actor;
+ this.actorContext = actorContext;
+ this.schemaContext = schemaContext;
}
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());
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Tx {} closeTransaction called", identifier);
+ }
+ actorContext.sendOperationAsync(getActor(), new CloseTransaction().toSerializable());
}
@Override
- public Future readyTransaction() {
- LOG.debug("Tx {} readyTransaction called with {} previous recorded operations pending",
+ 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.
- final Future