X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FShard.java;h=7073ea758b2b751d93708914bfc3935779076908;hp=bf1eb056b577ce265c1a8e6d794a3572bf469ab5;hb=a469dbcec569cc972df0cd57cf725a2173d2604a;hpb=a277626b53741281883b1f414ef1885beb489f49
diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
index bf1eb056b5..7073ea758b 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
@@ -10,6 +10,7 @@ package org.opendaylight.controller.cluster.datastore;
import akka.actor.ActorRef;
import akka.actor.ActorSelection;
+import akka.actor.Cancellable;
import akka.actor.PoisonPill;
import akka.actor.Props;
import akka.event.Logging;
@@ -20,46 +21,60 @@ import akka.serialization.Serialization;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
-import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.collect.Lists;
import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.protobuf.ByteString;
import com.google.protobuf.InvalidProtocolBufferException;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Nonnull;
+import org.opendaylight.controller.cluster.DataPersistenceProvider;
import org.opendaylight.controller.cluster.common.actor.CommonConfig;
import org.opendaylight.controller.cluster.common.actor.MeteringBehavior;
+import org.opendaylight.controller.cluster.datastore.ShardCommitCoordinator.CohortEntry;
+import org.opendaylight.controller.cluster.datastore.compat.BackwardsCompatibleThreePhaseCommitCohort;
+import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
import org.opendaylight.controller.cluster.datastore.identifiers.ShardTransactionIdentifier;
import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardMBeanFactory;
import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats;
+import org.opendaylight.controller.cluster.datastore.messages.AbortTransaction;
+import org.opendaylight.controller.cluster.datastore.messages.AbortTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.ActorInitialized;
+import org.opendaylight.controller.cluster.datastore.messages.CanCommitTransaction;
import org.opendaylight.controller.cluster.datastore.messages.CloseTransactionChain;
+import org.opendaylight.controller.cluster.datastore.messages.CommitTransaction;
import org.opendaylight.controller.cluster.datastore.messages.CommitTransactionReply;
import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChainReply;
import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
-import org.opendaylight.controller.cluster.datastore.messages.ForwardedCommitTransaction;
+import org.opendaylight.controller.cluster.datastore.messages.ForwardedReadyTransaction;
import org.opendaylight.controller.cluster.datastore.messages.PeerAddressResolved;
import org.opendaylight.controller.cluster.datastore.messages.ReadData;
import org.opendaylight.controller.cluster.datastore.messages.ReadDataReply;
+import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
import org.opendaylight.controller.cluster.datastore.modification.Modification;
import org.opendaylight.controller.cluster.datastore.modification.MutableCompositeModification;
import org.opendaylight.controller.cluster.datastore.node.NormalizedNodeToNodeCodec;
-import org.opendaylight.controller.cluster.raft.ConfigParams;
-import org.opendaylight.controller.cluster.raft.DefaultConfigParamsImpl;
+import org.opendaylight.controller.cluster.notifications.RoleChangeNotifier;
import org.opendaylight.controller.cluster.raft.RaftActor;
import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
import org.opendaylight.controller.cluster.raft.protobuff.client.messages.CompositeModificationPayload;
+import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
-import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore;
import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStoreFactory;
import org.opendaylight.controller.protobuff.messages.common.NormalizedNodeMessages;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionFactory;
@@ -68,15 +83,9 @@ import org.opendaylight.yangtools.concepts.ListenerRegistration;
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 scala.concurrent.duration.Duration;
import scala.concurrent.duration.FiniteDuration;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeUnit;
-
/**
* A Shard represents a portion of the logical data tree
@@ -85,51 +94,65 @@ import java.util.concurrent.TimeUnit;
*/
public class Shard extends RaftActor {
- private static final ConfigParams configParams = new ShardConfigParams();
+ private static final Object COMMIT_TRANSACTION_REPLY = new CommitTransactionReply().toSerializable();
+
+ private static final Object TX_COMMIT_TIMEOUT_CHECK_MESSAGE = "txCommitTimeoutCheck";
public static final String DEFAULT_NAME = "default";
// The state of this Shard
private final InMemoryDOMDataStore store;
- private final Map
- modificationToCohort = new HashMap<>();
-
private final LoggingAdapter LOG =
Logging.getLogger(getContext().system(), this);
- // By default persistent will be true and can be turned off using the system
- // property shard.persistent
- private final boolean persistent;
-
/// The name of this shard
private final ShardIdentifier name;
private final ShardStats shardMBean;
- private final List dataChangeListeners = new ArrayList<>();
+ private final List dataChangeListeners = Lists.newArrayList();
+
+ private final List delayedListenerRegistrations =
+ Lists.newArrayList();
private final DatastoreContext datastoreContext;
+ private final DataPersistenceProvider dataPersistenceProvider;
+
private SchemaContext schemaContext;
private ActorRef createSnapshotTransaction;
+ private int createSnapshotTransactionCounter;
+
+ private final ShardCommitCoordinator commitCoordinator;
+
+ private final long transactionCommitTimeout;
+
+ private Cancellable txCommitTimeoutCheckSchedule;
+
+ private Optional roleChangeNotifier;
+
+ /**
+ * Coordinates persistence recovery on startup.
+ */
+ private ShardRecoveryCoordinator recoveryCoordinator;
+ private List currentLogRecoveryBatch;
+
private final Map transactionChains = new HashMap<>();
- private Shard(ShardIdentifier name, Map peerAddresses,
- DatastoreContext datastoreContext, SchemaContext schemaContext) {
- super(name.toString(), mapPeerAddresses(peerAddresses), Optional.of(configParams));
+ protected Shard(final ShardIdentifier name, final Map peerAddresses,
+ final DatastoreContext datastoreContext, final SchemaContext schemaContext) {
+ super(name.toString(), mapPeerAddresses(peerAddresses),
+ Optional.of(datastoreContext.getShardRaftConfig()));
this.name = name;
this.datastoreContext = datastoreContext;
this.schemaContext = schemaContext;
+ this.dataPersistenceProvider = (datastoreContext.isPersistent()) ? new PersistentDataProvider() : new NonPersistentRaftDataProvider();
- String setting = System.getProperty("shard.persistent");
-
- this.persistent = !"false".equals(setting);
-
- LOG.info("Shard created : {} persistent : {}", name, persistent);
+ LOG.info("Shard created : {} persistent : {}", name, datastoreContext.isPersistent());
store = InMemoryDOMDataStoreFactory.create(name.toString(), null,
datastoreContext.getDataStoreProperties());
@@ -140,16 +163,24 @@ public class Shard extends RaftActor {
shardMBean = ShardMBeanFactory.getShardStatsMBean(name.toString(),
datastoreContext.getDataStoreMXBeanType());
- shardMBean.setDataStoreExecutor(store.getDomStoreExecutor());
shardMBean.setNotificationManager(store.getDataChangeListenerNotificationManager());
if (isMetricsCaptureEnabled()) {
getContext().become(new MeteringBehavior(this));
}
+
+ commitCoordinator = new ShardCommitCoordinator(TimeUnit.SECONDS.convert(1, TimeUnit.MINUTES),
+ datastoreContext.getShardTransactionCommitQueueCapacity());
+
+ transactionCommitTimeout = TimeUnit.MILLISECONDS.convert(
+ datastoreContext.getShardTransactionCommitTimeoutInSeconds(), TimeUnit.SECONDS);
+
+ // create a notifier actor for each cluster member
+ roleChangeNotifier = createRoleChangeNotifier(name.toString());
}
private static Map mapPeerAddresses(
- Map peerAddresses) {
+ final Map peerAddresses) {
Map map = new HashMap<>();
for (Map.Entry entry : peerAddresses
@@ -162,7 +193,7 @@ public class Shard extends RaftActor {
public static Props props(final ShardIdentifier name,
final Map peerAddresses,
- DatastoreContext datastoreContext, SchemaContext schemaContext) {
+ final DatastoreContext datastoreContext, final SchemaContext schemaContext) {
Preconditions.checkNotNull(name, "name should not be null");
Preconditions.checkNotNull(peerAddresses, "peerAddresses should not be null");
Preconditions.checkNotNull(datastoreContext, "dataStoreContext should not be null");
@@ -171,61 +202,288 @@ public class Shard extends RaftActor {
return Props.create(new ShardCreator(name, peerAddresses, datastoreContext, schemaContext));
}
- @Override public void onReceiveRecover(Object message) {
- LOG.debug("onReceiveRecover: Received message {} from {}", message.getClass().toString(),
- getSender());
+ private Optional createRoleChangeNotifier(String shardId) {
+ ActorRef shardRoleChangeNotifier = this.getContext().actorOf(
+ RoleChangeNotifier.getProps(shardId), shardId + "-notifier");
+ return Optional.of(shardRoleChangeNotifier);
+ }
+
+ @Override
+ public void postStop() {
+ super.postStop();
+
+ if(txCommitTimeoutCheckSchedule != null) {
+ txCommitTimeoutCheckSchedule.cancel();
+ }
+ }
+
+ @Override
+ public void onReceiveRecover(final Object message) throws Exception {
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("onReceiveRecover: Received message {} from {}",
+ message.getClass().toString(),
+ getSender());
+ }
if (message instanceof RecoveryFailure){
LOG.error(((RecoveryFailure) message).cause(), "Recovery failed because of this cause");
+
+ // Even though recovery failed, we still need to finish our recovery, eg send the
+ // ActorInitialized message and start the txCommitTimeoutCheckSchedule.
+ onRecoveryComplete();
} else {
super.onReceiveRecover(message);
}
}
- @Override public void onReceiveCommand(Object message) {
- LOG.debug("onReceiveCommand: Received message {} from {}", message.getClass().toString(),
- getSender());
+ @Override
+ public void onReceiveCommand(final Object message) throws Exception {
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("onReceiveCommand: Received message {} from {}", message, getSender());
+ }
if(message.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)) {
- // This must be for install snapshot. Don't want to open this up and trigger
- // deSerialization
- self()
- .tell(new CaptureSnapshotReply(ReadDataReply.getNormalizedNodeByteString(message)),
- self());
-
- createSnapshotTransaction = null;
- // Send a PoisonPill instead of sending close transaction because we do not really need
- // a response
- getSender().tell(PoisonPill.getInstance(), self());
-
+ handleReadDataReply(message);
+ } else if (message.getClass().equals(CreateTransaction.SERIALIZABLE_CLASS)) {
+ handleCreateTransaction(message);
+ } else if(message instanceof ForwardedReadyTransaction) {
+ handleForwardedReadyTransaction((ForwardedReadyTransaction)message);
+ } else if(message.getClass().equals(CanCommitTransaction.SERIALIZABLE_CLASS)) {
+ handleCanCommitTransaction(CanCommitTransaction.fromSerializable(message));
+ } else if(message.getClass().equals(CommitTransaction.SERIALIZABLE_CLASS)) {
+ handleCommitTransaction(CommitTransaction.fromSerializable(message));
+ } else if(message.getClass().equals(AbortTransaction.SERIALIZABLE_CLASS)) {
+ handleAbortTransaction(AbortTransaction.fromSerializable(message));
} else if (message.getClass().equals(CloseTransactionChain.SERIALIZABLE_CLASS)){
closeTransactionChain(CloseTransactionChain.fromSerializable(message));
} else if (message instanceof RegisterChangeListener) {
registerChangeListener((RegisterChangeListener) message);
} else if (message instanceof UpdateSchemaContext) {
updateSchemaContext((UpdateSchemaContext) message);
- } else if (message instanceof ForwardedCommitTransaction) {
- handleForwardedCommit((ForwardedCommitTransaction) message);
- } else if (message.getClass()
- .equals(CreateTransaction.SERIALIZABLE_CLASS)) {
- if (isLeader()) {
- createTransaction(CreateTransaction.fromSerializable(message));
- } else if (getLeader() != null) {
- getLeader().forward(message, getContext());
- } else {
- getSender().tell(new akka.actor.Status.Failure(new IllegalStateException(
- "Could not find leader so transaction cannot be created")), getSelf());
- }
} else if (message instanceof PeerAddressResolved) {
PeerAddressResolved resolved = (PeerAddressResolved) message;
setPeerAddress(resolved.getPeerId().toString(),
resolved.getPeerAddress());
+ } else if(message.equals(TX_COMMIT_TIMEOUT_CHECK_MESSAGE)) {
+ handleTransactionCommitTimeoutCheck();
} else {
super.onReceiveCommand(message);
}
}
- private void closeTransactionChain(CloseTransactionChain closeTransactionChain) {
+ @Override
+ protected Optional getRoleChangeNotifier() {
+ return roleChangeNotifier;
+ }
+
+ private void handleTransactionCommitTimeoutCheck() {
+ CohortEntry cohortEntry = commitCoordinator.getCurrentCohortEntry();
+ if(cohortEntry != null) {
+ long elapsed = System.currentTimeMillis() - cohortEntry.getLastAccessTime();
+ if(elapsed > transactionCommitTimeout) {
+ LOG.warning("Current transaction {} has timed out after {} ms - aborting",
+ cohortEntry.getTransactionID(), transactionCommitTimeout);
+
+ doAbortTransaction(cohortEntry.getTransactionID(), null);
+ }
+ }
+ }
+
+ private void handleCommitTransaction(final CommitTransaction commit) {
+ final String transactionID = commit.getTransactionID();
+
+ LOG.debug("Committing transaction {}", transactionID);
+
+ // Get the current in-progress cohort entry in the commitCoordinator if it corresponds to
+ // this transaction.
+ final CohortEntry cohortEntry = commitCoordinator.getCohortEntryIfCurrent(transactionID);
+ if(cohortEntry == null) {
+ // We're not the current Tx - the Tx was likely expired b/c it took too long in
+ // between the canCommit and commit messages.
+ IllegalStateException ex = new IllegalStateException(
+ String.format("Cannot commit transaction %s - it is not the current transaction",
+ transactionID));
+ LOG.error(ex.getMessage());
+ shardMBean.incrementFailedTransactionsCount();
+ getSender().tell(new akka.actor.Status.Failure(ex), getSelf());
+ return;
+ }
+
+ // We perform the preCommit phase here atomically with the commit phase. This is an
+ // optimization to eliminate the overhead of an extra preCommit message. We lose front-end
+ // coordination of preCommit across shards in case of failure but preCommit should not
+ // normally fail since we ensure only one concurrent 3-phase commit.
+
+ try {
+ // We block on the future here so we don't have to worry about possibly accessing our
+ // state on a different thread outside of our dispatcher. Also, the data store
+ // currently uses a same thread executor anyway.
+ cohortEntry.getCohort().preCommit().get();
+
+ Shard.this.persistData(getSender(), transactionID,
+ new CompositeModificationPayload(cohortEntry.getModification().toSerializable()));
+ } catch (InterruptedException | ExecutionException e) {
+ LOG.error(e, "An exception occurred while preCommitting transaction {}",
+ cohortEntry.getTransactionID());
+ shardMBean.incrementFailedTransactionsCount();
+ getSender().tell(new akka.actor.Status.Failure(e), getSelf());
+ }
+
+ cohortEntry.updateLastAccessTime();
+ }
+
+ private void finishCommit(@Nonnull final ActorRef sender, final @Nonnull String transactionID) {
+ // With persistence enabled, this method is called via applyState by the leader strategy
+ // after the commit has been replicated to a majority of the followers.
+
+ CohortEntry cohortEntry = commitCoordinator.getCohortEntryIfCurrent(transactionID);
+ if(cohortEntry == null) {
+ // The transaction is no longer the current commit. This can happen if the transaction
+ // was aborted prior, most likely due to timeout in the front-end. We need to finish
+ // committing the transaction though since it was successfully persisted and replicated
+ // however we can't use the original cohort b/c it was already preCommitted and may
+ // conflict with the current commit or may have been aborted so we commit with a new
+ // transaction.
+ cohortEntry = commitCoordinator.getAndRemoveCohortEntry(transactionID);
+ if(cohortEntry != null) {
+ commitWithNewTransaction(cohortEntry.getModification());
+ sender.tell(COMMIT_TRANSACTION_REPLY, getSelf());
+ } else {
+ // This really shouldn't happen - it likely means that persistence or replication
+ // took so long to complete such that the cohort entry was expired from the cache.
+ IllegalStateException ex = new IllegalStateException(
+ String.format("Could not finish committing transaction %s - no CohortEntry found",
+ transactionID));
+ LOG.error(ex.getMessage());
+ sender.tell(new akka.actor.Status.Failure(ex), getSelf());
+ }
+
+ return;
+ }
+
+ LOG.debug("Finishing commit for transaction {}", cohortEntry.getTransactionID());
+
+ try {
+ // We block on the future here so we don't have to worry about possibly accessing our
+ // state on a different thread outside of our dispatcher. Also, the data store
+ // currently uses a same thread executor anyway.
+ cohortEntry.getCohort().commit().get();
+
+ sender.tell(COMMIT_TRANSACTION_REPLY, getSelf());
+
+ shardMBean.incrementCommittedTransactionCount();
+ shardMBean.setLastCommittedTransactionTime(System.currentTimeMillis());
+
+ } catch (InterruptedException | ExecutionException e) {
+ sender.tell(new akka.actor.Status.Failure(e), getSelf());
+
+ LOG.error(e, "An exception occurred while committing transaction {}", transactionID);
+ shardMBean.incrementFailedTransactionsCount();
+ }
+
+ commitCoordinator.currentTransactionComplete(transactionID, true);
+ }
+
+ private void handleCanCommitTransaction(final CanCommitTransaction canCommit) {
+ LOG.debug("Can committing transaction {}", canCommit.getTransactionID());
+ commitCoordinator.handleCanCommit(canCommit, getSender(), self());
+ }
+
+ private void handleForwardedReadyTransaction(ForwardedReadyTransaction ready) {
+ LOG.debug("Readying transaction {}, client version {}", ready.getTransactionID(),
+ ready.getTxnClientVersion());
+
+ // This message is forwarded by the ShardTransaction on ready. We cache the cohort in the
+ // commitCoordinator in preparation for the subsequent three phase commit initiated by
+ // the front-end.
+ commitCoordinator.transactionReady(ready.getTransactionID(), ready.getCohort(),
+ ready.getModification());
+
+ // Return our actor path as we'll handle the three phase commit, except if the Tx client
+ // version < 1 (Helium-1 version). This means the Tx was initiated by a base Helium version
+ // node. In that case, the subsequent 3-phase commit messages won't contain the
+ // transactionId so to maintain backwards compatibility, we create a separate cohort actor
+ // to provide the compatible behavior.
+ ActorRef replyActorPath = self();
+ if(ready.getTxnClientVersion() < CreateTransaction.HELIUM_1_VERSION) {
+ LOG.debug("Creating BackwardsCompatibleThreePhaseCommitCohort");
+ replyActorPath = getContext().actorOf(BackwardsCompatibleThreePhaseCommitCohort.props(
+ ready.getTransactionID()));
+ }
+
+ ReadyTransactionReply readyTransactionReply = new ReadyTransactionReply(
+ Serialization.serializedActorPath(replyActorPath));
+ getSender().tell(ready.isReturnSerialized() ? readyTransactionReply.toSerializable() :
+ readyTransactionReply, getSelf());
+ }
+
+ private void handleAbortTransaction(final AbortTransaction abort) {
+ doAbortTransaction(abort.getTransactionID(), getSender());
+ }
+
+ private void doAbortTransaction(final String transactionID, final ActorRef sender) {
+ final CohortEntry cohortEntry = commitCoordinator.getCohortEntryIfCurrent(transactionID);
+ if(cohortEntry != null) {
+ LOG.debug("Aborting transaction {}", transactionID);
+
+ // We don't remove the cached cohort entry here (ie pass false) in case the Tx was
+ // aborted during replication in which case we may still commit locally if replication
+ // succeeds.
+ commitCoordinator.currentTransactionComplete(transactionID, false);
+
+ final ListenableFuture future = cohortEntry.getCohort().abort();
+ final ActorRef self = getSelf();
+
+ Futures.addCallback(future, new FutureCallback() {
+ @Override
+ public void onSuccess(final Void v) {
+ shardMBean.incrementAbortTransactionsCount();
+
+ if(sender != null) {
+ sender.tell(new AbortTransactionReply().toSerializable(), self);
+ }
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.error(t, "An exception happened during abort");
+
+ if(sender != null) {
+ sender.tell(new akka.actor.Status.Failure(t), self);
+ }
+ }
+ });
+ }
+ }
+
+ private void handleCreateTransaction(final Object message) {
+ if (isLeader()) {
+ createTransaction(CreateTransaction.fromSerializable(message));
+ } else if (getLeader() != null) {
+ getLeader().forward(message, getContext());
+ } else {
+ getSender().tell(new akka.actor.Status.Failure(new NoShardLeaderException(
+ "Could not find shard leader so transaction cannot be created. This typically happens" +
+ " when the system is coming up or recovering and a leader is being elected. Try again" +
+ " later.")), getSelf());
+ }
+ }
+
+ private void handleReadDataReply(final Object message) {
+ // This must be for install snapshot. Don't want to open this up and trigger
+ // deSerialization
+
+ self().tell(new CaptureSnapshotReply(ReadDataReply.getNormalizedNodeByteString(message)),
+ self());
+
+ createSnapshotTransaction = null;
+
+ // Send a PoisonPill instead of sending close transaction because we do not really need
+ // a response
+ getSender().tell(PoisonPill.getInstance(), self());
+ }
+
+ private void closeTransactionChain(final CloseTransactionChain closeTransactionChain) {
DOMStoreTransactionChain chain =
transactionChains.remove(closeTransactionChain.getTransactionChainId());
@@ -234,10 +492,8 @@ public class Shard extends RaftActor {
}
}
- private ActorRef createTypedTransactionActor(
- int transactionType,
- ShardTransactionIdentifier transactionId,
- String transactionChainId ) {
+ private ActorRef createTypedTransactionActor(int transactionType,
+ ShardTransactionIdentifier transactionId, String transactionChainId, int clientVersion ) {
DOMStoreTransactionFactory factory = store;
@@ -250,37 +506,40 @@ public class Shard extends RaftActor {
}
}
- if(this.schemaContext == null){
- throw new NullPointerException("schemaContext should not be null");
+ if(this.schemaContext == null) {
+ throw new IllegalStateException("SchemaContext is not set");
}
- if (transactionType
- == TransactionProxy.TransactionType.READ_ONLY.ordinal()) {
+ if (transactionType == TransactionProxy.TransactionType.READ_ONLY.ordinal()) {
shardMBean.incrementReadOnlyTransactionCount();
return getContext().actorOf(
ShardTransaction.props(factory.newReadOnlyTransaction(), getSelf(),
- schemaContext,datastoreContext, shardMBean), transactionId.toString());
+ schemaContext,datastoreContext, shardMBean,
+ transactionId.getRemoteTransactionId(), clientVersion),
+ transactionId.toString());
- } else if (transactionType
- == TransactionProxy.TransactionType.READ_WRITE.ordinal()) {
+ } else if (transactionType == TransactionProxy.TransactionType.READ_WRITE.ordinal()) {
shardMBean.incrementReadWriteTransactionCount();
return getContext().actorOf(
ShardTransaction.props(factory.newReadWriteTransaction(), getSelf(),
- schemaContext, datastoreContext, shardMBean), transactionId.toString());
+ schemaContext, datastoreContext, shardMBean,
+ transactionId.getRemoteTransactionId(), clientVersion),
+ transactionId.toString());
- } else if (transactionType
- == TransactionProxy.TransactionType.WRITE_ONLY.ordinal()) {
+ } else if (transactionType == TransactionProxy.TransactionType.WRITE_ONLY.ordinal()) {
shardMBean.incrementWriteOnlyTransactionCount();
return getContext().actorOf(
ShardTransaction.props(factory.newWriteOnlyTransaction(), getSelf(),
- schemaContext, datastoreContext, shardMBean), transactionId.toString());
+ schemaContext, datastoreContext, shardMBean,
+ transactionId.getRemoteTransactionId(), clientVersion),
+ transactionId.toString());
} else {
throw new IllegalArgumentException(
"Shard="+name + ":CreateTransaction message has unidentified transaction type="
@@ -289,163 +548,116 @@ public class Shard extends RaftActor {
}
private void createTransaction(CreateTransaction createTransaction) {
- createTransaction(createTransaction.getTransactionType(),
- createTransaction.getTransactionId(), createTransaction.getTransactionChainId());
+ try {
+ ActorRef transactionActor = createTransaction(createTransaction.getTransactionType(),
+ createTransaction.getTransactionId(), createTransaction.getTransactionChainId(),
+ createTransaction.getVersion());
+
+ getSender().tell(new CreateTransactionReply(Serialization.serializedActorPath(transactionActor),
+ createTransaction.getTransactionId()).toSerializable(), getSelf());
+ } catch (Exception e) {
+ getSender().tell(new akka.actor.Status.Failure(e), getSelf());
+ }
}
- private ActorRef createTransaction(int transactionType, String remoteTransactionId, String transactionChainId) {
+ private ActorRef createTransaction(int transactionType, String remoteTransactionId,
+ String transactionChainId, int clientVersion) {
ShardTransactionIdentifier transactionId =
ShardTransactionIdentifier.builder()
.remoteTransactionId(remoteTransactionId)
.build();
- LOG.debug("Creating transaction : {} ", transactionId);
- ActorRef transactionActor =
- createTypedTransactionActor(transactionType, transactionId, transactionChainId);
- getSender()
- .tell(new CreateTransactionReply(
- Serialization.serializedActorPath(transactionActor),
- remoteTransactionId).toSerializable(),
- getSelf());
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Creating transaction : {} ", transactionId);
+ }
+
+ ActorRef transactionActor = createTypedTransactionActor(transactionType, transactionId,
+ transactionChainId, clientVersion);
return transactionActor;
}
- private void syncCommitTransaction(DOMStoreWriteTransaction transaction)
+ private void syncCommitTransaction(final DOMStoreWriteTransaction transaction)
throws ExecutionException, InterruptedException {
DOMStoreThreePhaseCommitCohort commitCohort = transaction.ready();
commitCohort.preCommit().get();
commitCohort.commit().get();
}
-
- private void commit(final ActorRef sender, Object serialized) {
- Modification modification = MutableCompositeModification
- .fromSerializable(serialized, schemaContext);
- DOMStoreThreePhaseCommitCohort cohort =
- modificationToCohort.remove(serialized);
- if (cohort == null) {
- LOG.debug(
- "Could not find cohort for modification : {}. Writing modification using a new transaction",
- modification);
- DOMStoreWriteTransaction transaction =
- store.newWriteOnlyTransaction();
-
- LOG.debug("Created new transaction {}", transaction.getIdentifier().toString());
-
- modification.apply(transaction);
- try {
- syncCommitTransaction(transaction);
- } catch (InterruptedException | ExecutionException e) {
- shardMBean.incrementFailedTransactionsCount();
- LOG.error("Failed to commit", e);
- return;
- }
- //we want to just apply the recovery commit and return
+ private void commitWithNewTransaction(final Modification modification) {
+ DOMStoreWriteTransaction tx = store.newWriteOnlyTransaction();
+ modification.apply(tx);
+ try {
+ syncCommitTransaction(tx);
shardMBean.incrementCommittedTransactionCount();
- return;
- }
-
-
- if(sender == null){
- LOG.error("Commit failed. Sender cannot be null");
- return;
+ shardMBean.setLastCommittedTransactionTime(System.currentTimeMillis());
+ } catch (InterruptedException | ExecutionException e) {
+ shardMBean.incrementFailedTransactionsCount();
+ LOG.error(e, "Failed to commit");
}
-
- final ListenableFuture future = cohort.commit();
- final ActorRef self = getSelf();
-
- Futures.addCallback(future, new FutureCallback() {
- @Override
- public void onSuccess(Void v) {
- sender.tell(new CommitTransactionReply().toSerializable(), self);
- shardMBean.incrementCommittedTransactionCount();
- shardMBean.setLastCommittedTransactionTime(System.currentTimeMillis());
- }
-
- @Override
- public void onFailure(Throwable t) {
- LOG.error(t, "An exception happened during commit");
- shardMBean.incrementFailedTransactionsCount();
- sender.tell(new akka.actor.Status.Failure(t), self);
- }
- });
-
}
- private void handleForwardedCommit(ForwardedCommitTransaction message) {
- Object serializedModification =
- message.getModification().toSerializable();
-
- modificationToCohort
- .put(serializedModification, message.getCohort());
-
- if (persistent) {
- this.persistData(getSender(), "identifier",
- new CompositeModificationPayload(serializedModification));
- } else {
- this.commit(getSender(), serializedModification);
- }
- }
-
- private void updateSchemaContext(UpdateSchemaContext message) {
+ private void updateSchemaContext(final UpdateSchemaContext message) {
this.schemaContext = message.getSchemaContext();
updateSchemaContext(message.getSchemaContext());
store.onGlobalContextUpdated(message.getSchemaContext());
}
- @VisibleForTesting void updateSchemaContext(SchemaContext schemaContext) {
+ @VisibleForTesting
+ void updateSchemaContext(final SchemaContext schemaContext) {
store.onGlobalContextUpdated(schemaContext);
}
- private void registerChangeListener(
- RegisterChangeListener registerChangeListener) {
+ private void registerChangeListener(final RegisterChangeListener registerChangeListener) {
- LOG.debug("registerDataChangeListener for {}", registerChangeListener
- .getPath());
+ LOG.debug("registerDataChangeListener for {}", registerChangeListener.getPath());
+ ListenerRegistration>> registration;
+ if(isLeader()) {
+ registration = doChangeListenerRegistration(registerChangeListener);
+ } else {
+ LOG.debug("Shard is not the leader - delaying registration");
- ActorSelection dataChangeListenerPath = getContext()
- .system().actorSelection(
- registerChangeListener.getDataChangeListenerPath());
+ DelayedListenerRegistration delayedReg =
+ new DelayedListenerRegistration(registerChangeListener);
+ delayedListenerRegistrations.add(delayedReg);
+ registration = delayedReg;
+ }
+ ActorRef listenerRegistration = getContext().actorOf(
+ DataChangeListenerRegistration.props(registration));
+
+ LOG.debug("registerDataChangeListener sending reply, listenerRegistrationPath = {} ",
+ listenerRegistration.path());
+
+ getSender().tell(new RegisterChangeListenerReply(listenerRegistration.path()), getSelf());
+ }
+
+ private ListenerRegistration>> doChangeListenerRegistration(
+ final RegisterChangeListener registerChangeListener) {
+
+ ActorSelection dataChangeListenerPath = getContext().system().actorSelection(
+ registerChangeListener.getDataChangeListenerPath());
// Notify the listener if notifications should be enabled or not
// If this shard is the leader then it will enable notifications else
// it will not
- dataChangeListenerPath
- .tell(new EnableNotification(isLeader()), getSelf());
+ dataChangeListenerPath.tell(new EnableNotification(true), getSelf());
// Now store a reference to the data change listener so it can be notified
// at a later point if notifications should be enabled or disabled
dataChangeListeners.add(dataChangeListenerPath);
- AsyncDataChangeListener>
- listener = new DataChangeListenerProxy(schemaContext, dataChangeListenerPath);
-
- ListenerRegistration>>
- registration = store.registerChangeListener(registerChangeListener.getPath(),
- listener, registerChangeListener.getScope());
- ActorRef listenerRegistration =
- getContext().actorOf(
- DataChangeListenerRegistration.props(registration));
-
- LOG.debug(
- "registerDataChangeListener sending reply, listenerRegistrationPath = {} "
- , listenerRegistration.path().toString());
+ AsyncDataChangeListener> listener =
+ new DataChangeListenerProxy(schemaContext, dataChangeListenerPath);
- getSender()
- .tell(new RegisterChangeListenerReply(listenerRegistration.path()),
- getSelf());
- }
+ LOG.debug("Registering for path {}", registerChangeListener.getPath());
- private void createTransactionChain() {
- DOMStoreTransactionChain chain = store.createTransactionChain();
- ActorRef transactionChain = getContext().actorOf(
- ShardTransactionChain.props(chain, schemaContext, datastoreContext, shardMBean));
- getSender().tell(new CreateTransactionChainReply(transactionChain.path()).toSerializable(),
- getSelf());
+ return store.registerChangeListener(registerChangeListener.getPath(), listener,
+ registerChangeListener.getScope());
}
private boolean isMetricsCaptureEnabled(){
@@ -453,26 +665,120 @@ public class Shard extends RaftActor {
return config.isMetricCaptureEnabled();
}
- @Override protected void applyState(ActorRef clientActor, String identifier,
- Object data) {
+ @Override
+ protected
+ void startLogRecoveryBatch(final int maxBatchSize) {
+ currentLogRecoveryBatch = Lists.newArrayListWithCapacity(maxBatchSize);
+
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("{} : starting log recovery batch with max size {}", persistenceId(), maxBatchSize);
+ }
+ }
+ @Override
+ protected void appendRecoveredLogEntry(final Payload data) {
if (data instanceof CompositeModificationPayload) {
- Object modification =
- ((CompositeModificationPayload) data).getModification();
+ currentLogRecoveryBatch.add(((CompositeModificationPayload) data).getModification());
+ } else {
+ LOG.error("Unknown state received {} during recovery", data);
+ }
+ }
- if (modification != null) {
- commit(clientActor, modification);
- } else {
- LOG.error(
- "modification is null - this is very unexpected, clientActor = {}, identifier = {}",
- identifier, clientActor.path().toString());
+ @Override
+ protected void applyRecoverySnapshot(final ByteString snapshot) {
+ if(recoveryCoordinator == null) {
+ recoveryCoordinator = new ShardRecoveryCoordinator(persistenceId(), schemaContext);
+ }
+
+ recoveryCoordinator.submit(snapshot, store.newWriteOnlyTransaction());
+
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("{} : submitted recovery sbapshot", persistenceId());
+ }
+ }
+
+ @Override
+ protected void applyCurrentLogRecoveryBatch() {
+ if(recoveryCoordinator == null) {
+ recoveryCoordinator = new ShardRecoveryCoordinator(persistenceId(), schemaContext);
+ }
+
+ recoveryCoordinator.submit(currentLogRecoveryBatch, store.newWriteOnlyTransaction());
+
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("{} : submitted log recovery batch with size {}", persistenceId(),
+ currentLogRecoveryBatch.size());
+ }
+ }
+
+ @Override
+ protected void onRecoveryComplete() {
+ if(recoveryCoordinator != null) {
+ Collection txList = recoveryCoordinator.getTransactions();
+
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("{} : recovery complete - committing {} Tx's", persistenceId(), txList.size());
}
+ for(DOMStoreWriteTransaction tx: txList) {
+ try {
+ syncCommitTransaction(tx);
+ shardMBean.incrementCommittedTransactionCount();
+ } catch (InterruptedException | ExecutionException e) {
+ shardMBean.incrementFailedTransactionsCount();
+ LOG.error(e, "Failed to commit");
+ }
+ }
+ }
+
+ recoveryCoordinator = null;
+ currentLogRecoveryBatch = null;
+ updateJournalStats();
+
+ //notify shard manager
+ getContext().parent().tell(new ActorInitialized(), getSelf());
+
+ // Being paranoid here - this method should only be called once but just in case...
+ if(txCommitTimeoutCheckSchedule == null) {
+ // Schedule a message to be periodically sent to check if the current in-progress
+ // transaction should be expired and aborted.
+ FiniteDuration period = Duration.create(transactionCommitTimeout / 3, TimeUnit.MILLISECONDS);
+ txCommitTimeoutCheckSchedule = getContext().system().scheduler().schedule(
+ period, period, getSelf(),
+ TX_COMMIT_TIMEOUT_CHECK_MESSAGE, getContext().dispatcher(), ActorRef.noSender());
+ }
+ }
+
+ @Override
+ protected void applyState(final ActorRef clientActor, final String identifier, final Object data) {
+
+ if (data instanceof CompositeModificationPayload) {
+ Object modification = ((CompositeModificationPayload) data).getModification();
+
+ if(modification == null) {
+ LOG.error(
+ "modification is null - this is very unexpected, clientActor = {}, identifier = {}",
+ identifier, clientActor != null ? clientActor.path().toString() : null);
+ } else if(clientActor == null) {
+ // There's no clientActor to which to send a commit reply so we must be applying
+ // replicated state from the leader.
+ commitWithNewTransaction(MutableCompositeModification.fromSerializable(
+ modification, schemaContext));
+ } else {
+ // This must be the OK to commit after replication consensus.
+ finishCommit(clientActor, identifier);
+ }
} else {
- LOG.error("Unknown state received {} Class loader = {} CompositeNodeMod.ClassLoader = {}", data, data.getClass().getClassLoader(), CompositeModificationPayload.class.getClassLoader());
+ LOG.error("Unknown state received {} Class loader = {} CompositeNodeMod.ClassLoader = {}",
+ data, data.getClass().getClassLoader(),
+ CompositeModificationPayload.class.getClassLoader());
}
- // Update stats
+ updateJournalStats();
+
+ }
+
+ private void updateJournalStats() {
ReplicatedLogEntry lastLogEntry = getLastLogEntry();
if (lastLogEntry != null) {
@@ -482,17 +788,18 @@ public class Shard extends RaftActor {
shardMBean.setCommitIndex(getCommitIndex());
shardMBean.setLastApplied(getLastApplied());
-
}
- @Override protected void createSnapshot() {
+ @Override
+ protected void createSnapshot() {
if (createSnapshotTransaction == null) {
// Create a transaction. We are really going to treat the transaction as a worker
// so that this actor does not get block building the snapshot
createSnapshotTransaction = createTransaction(
TransactionProxy.TransactionType.READ_ONLY.ordinal(),
- "createSnapshot", "");
+ "createSnapshot" + ++createSnapshotTransactionCounter, "",
+ CreateTransaction.CURRENT_VERSION);
createSnapshotTransaction.tell(
new ReadData(YangInstanceIdentifier.builder().build()).toSerializable(), self());
@@ -500,7 +807,9 @@ public class Shard extends RaftActor {
}
}
- @VisibleForTesting @Override protected void applySnapshot(ByteString snapshot) {
+ @VisibleForTesting
+ @Override
+ protected void applySnapshot(final ByteString snapshot) {
// Since this will be done only on Recovery or when this actor is a Follower
// we can safely commit everything in here. We not need to worry about event notifications
// as they would have already been disabled on the follower
@@ -510,7 +819,7 @@ public class Shard extends RaftActor {
DOMStoreWriteTransaction transaction = store.newWriteOnlyTransaction();
NormalizedNodeMessages.Node serializedNode = NormalizedNodeMessages.Node.parseFrom(snapshot);
NormalizedNode node = new NormalizedNodeToNodeCodec(schemaContext)
- .decode(YangInstanceIdentifier.builder().build(), serializedNode);
+ .decode(serializedNode);
// delete everything first
transaction.delete(YangInstanceIdentifier.builder().build());
@@ -525,20 +834,34 @@ public class Shard extends RaftActor {
}
}
- @Override protected void onStateChanged() {
+ @Override
+ protected void onStateChanged() {
+ boolean isLeader = isLeader();
for (ActorSelection dataChangeListener : dataChangeListeners) {
- dataChangeListener
- .tell(new EnableNotification(isLeader()), getSelf());
+ dataChangeListener.tell(new EnableNotification(isLeader), getSelf());
}
+ if(isLeader) {
+ for(DelayedListenerRegistration reg: delayedListenerRegistrations) {
+ if(!reg.isClosed()) {
+ reg.setDelegate(doChangeListenerRegistration(reg.getRegisterChangeListener()));
+ }
+ }
+
+ delayedListenerRegistrations.clear();
+ }
shardMBean.setRaftState(getRaftState().name());
shardMBean.setCurrentTerm(getCurrentTerm());
// If this actor is no longer the leader close all the transaction chains
- if(!isLeader()){
+ if(!isLeader){
for(Map.Entry entry : transactionChains.entrySet()){
- LOG.debug("onStateChanged: Closing transaction chain {} because shard {} is no longer the leader", entry.getKey(), getId());
+ if(LOG.isDebugEnabled()) {
+ LOG.debug(
+ "onStateChanged: Closing transaction chain {} because shard {} is no longer the leader",
+ entry.getKey(), getId());
+ }
entry.getValue().close();
}
@@ -546,11 +869,12 @@ public class Shard extends RaftActor {
}
}
- @Override protected void onLeaderChanged(String oldLeader, String newLeader) {
- if((oldLeader == null && newLeader == null) || (newLeader != null && newLeader.equals(oldLeader)) ){
- return;
- }
- LOG.info("Current state = {}, Leader = {}", getRaftState().name(), newLeader);
+ @Override
+ protected DataPersistenceProvider persistence() {
+ return dataPersistenceProvider;
+ }
+
+ @Override protected void onLeaderChanged(final String oldLeader, final String newLeader) {
shardMBean.setLeader(newLeader);
}
@@ -558,14 +882,9 @@ public class Shard extends RaftActor {
return this.name.toString();
}
-
- private static class ShardConfigParams extends DefaultConfigParamsImpl {
- public static final FiniteDuration HEART_BEAT_INTERVAL =
- new FiniteDuration(500, TimeUnit.MILLISECONDS);
-
- @Override public FiniteDuration getHeartBeatInterval() {
- return HEART_BEAT_INTERVAL;
- }
+ @VisibleForTesting
+ DataPersistenceProvider getDataPersistenceProvider() {
+ return dataPersistenceProvider;
}
private static class ShardCreator implements Creator {
@@ -577,8 +896,8 @@ public class Shard extends RaftActor {
final DatastoreContext datastoreContext;
final SchemaContext schemaContext;
- ShardCreator(ShardIdentifier name, Map peerAddresses,
- DatastoreContext datastoreContext, SchemaContext schemaContext) {
+ ShardCreator(final ShardIdentifier name, final Map peerAddresses,
+ final DatastoreContext datastoreContext, final SchemaContext schemaContext) {
this.name = name;
this.peerAddresses = peerAddresses;
this.datastoreContext = datastoreContext;
@@ -591,26 +910,54 @@ public class Shard extends RaftActor {
}
}
- @VisibleForTesting NormalizedNode readStore() throws ExecutionException, InterruptedException {
- DOMStoreReadTransaction transaction = store.newReadOnlyTransaction();
+ @VisibleForTesting
+ InMemoryDOMDataStore getDataStore() {
+ return store;
+ }
- CheckedFuture>, ReadFailedException> future =
- transaction.read(YangInstanceIdentifier.builder().build());
+ @VisibleForTesting
+ ShardStats getShardMBean() {
+ return shardMBean;
+ }
- NormalizedNode node = future.get().get();
+ private static class DelayedListenerRegistration implements
+ ListenerRegistration>> {
- transaction.close();
+ private volatile boolean closed;
- return node;
- }
+ private final RegisterChangeListener registerChangeListener;
- @VisibleForTesting void writeToStore(YangInstanceIdentifier id, NormalizedNode node)
- throws ExecutionException, InterruptedException {
- DOMStoreWriteTransaction transaction = store.newWriteOnlyTransaction();
+ private volatile ListenerRegistration>> delegate;
- transaction.write(id, node);
+ DelayedListenerRegistration(final RegisterChangeListener registerChangeListener) {
+ this.registerChangeListener = registerChangeListener;
+ }
- syncCommitTransaction(transaction);
- }
+ void setDelegate( final ListenerRegistration>> registration) {
+ this.delegate = registration;
+ }
+
+ boolean isClosed() {
+ return closed;
+ }
+
+ RegisterChangeListener getRegisterChangeListener() {
+ return registerChangeListener;
+ }
+
+ @Override
+ public AsyncDataChangeListener> getInstance() {
+ return delegate != null ? delegate.getInstance() : null;
+ }
+ @Override
+ public void close() {
+ closed = true;
+ if(delegate != null) {
+ delegate.close();
+ }
+ }
+ }
}