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.BatchedModifications;
+import org.opendaylight.controller.cluster.datastore.messages.BatchedModificationsReply;
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.md.sal.dom.store.impl.InMemoryDOMDataStoreFactory;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionFactory;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
private final InMemoryDOMDataStore store;
/// The name of this shard
- private final ShardIdentifier name;
+ private final String name;
private final ShardStats shardMBean;
private ShardRecoveryCoordinator recoveryCoordinator;
private List<Object> currentLogRecoveryBatch;
- private final Map<String, DOMStoreTransactionChain> transactionChains = new HashMap<>();
+ private final DOMTransactionFactory transactionFactory;
private final String txnDispatcherPath;
super(name.toString(), mapPeerAddresses(peerAddresses),
Optional.of(datastoreContext.getShardRaftConfig()));
- this.name = name;
+ this.name = name.toString();
this.datastoreContext = datastoreContext;
this.schemaContext = schemaContext;
this.dataPersistenceProvider = (datastoreContext.isPersistent())
getContext().become(new MeteringBehavior(this));
}
- commitCoordinator = new ShardCommitCoordinator(TimeUnit.SECONDS.convert(1, TimeUnit.MINUTES),
- datastoreContext.getShardTransactionCommitQueueCapacity(), LOG, name.toString());
+ transactionFactory = new DOMTransactionFactory(store, shardMBean, LOG, this.name);
+
+ commitCoordinator = new ShardCommitCoordinator(transactionFactory,
+ TimeUnit.SECONDS.convert(5, TimeUnit.MINUTES),
+ datastoreContext.getShardTransactionCommitQueueCapacity(), self(), LOG, this.name);
setTransactionCommitTimeout();
try {
if (CreateTransaction.SERIALIZABLE_CLASS.isInstance(message)) {
handleCreateTransaction(message);
+ } else if (BatchedModifications.class.isInstance(message)) {
+ handleBatchedModifications((BatchedModifications)message);
} else if (message instanceof ForwardedReadyTransaction) {
handleForwardedReadyTransaction((ForwardedReadyTransaction) message);
} else if (CanCommitTransaction.SERIALIZABLE_CLASS.isInstance(message)) {
commitCoordinator.handleCanCommit(canCommit, getSender(), self());
}
+ private void handleBatchedModifications(BatchedModifications batched) {
+ // This message is sent to prepare the modificationsa transaction directly on the Shard as an
+ // optimization to avoid the extra overhead of a separate ShardTransaction actor. On the last
+ // BatchedModifications message, the caller sets the ready flag in the message indicating
+ // modifications are complete. The reply contains the cohort actor path (this actor) for the caller
+ // to initiate the 3-phase commit. This also avoids the overhead of sending an additional
+ // ReadyTransaction message.
+
+ // If we're not the leader then forward to the leader. This is a safety measure - we shouldn't
+ // normally get here if we're not the leader as the front-end (TransactionProxy) should determine
+ // the primary/leader shard. However with timing and caching on the front-end, there's a small
+ // window where it could have a stale leader during leadership transitions.
+ //
+ if(isLeader()) {
+ try {
+ BatchedModificationsReply reply = commitCoordinator.handleTransactionModifications(batched);
+ sender().tell(reply, self());
+ } catch (Exception e) {
+ LOG.error("{}: Error handling BatchedModifications for Tx {}", persistenceId(),
+ batched.getTransactionID(), e);
+ getSender().tell(new akka.actor.Status.Failure(e), getSelf());
+ }
+ } else {
+ ActorSelection leader = getLeader();
+ if(leader != null) {
+ // TODO: what if this is not the first batch and leadership changed in between batched messages?
+ // We could check if the commitCoordinator already has a cached entry and forward all the previous
+ // batched modifications.
+ LOG.debug("{}: Forwarding BatchedModifications to leader {}", persistenceId(), leader);
+ leader.forward(batched, getContext());
+ } else {
+ // TODO: rather than throwing an immediate exception, we could schedule a timer to try again to make
+ // it more resilient in case we're in the process of electing a new leader.
+ getSender().tell(new akka.actor.Status.Failure(new NoShardLeaderException(String.format(
+ "Could not find the leader for shard %s. This typically happens" +
+ " when the system is coming up or recovering and a leader is being elected. Try again" +
+ " later.", persistenceId()))), getSelf());
+ }
+ }
+ }
+
private void handleForwardedReadyTransaction(ForwardedReadyTransaction ready) {
LOG.debug("{}: Readying transaction {}, client version {}", persistenceId(),
ready.getTransactionID(), ready.getTxnClientVersion());
// commitCoordinator in preparation for the subsequent three phase commit initiated by
// the front-end.
commitCoordinator.transactionReady(ready.getTransactionID(), ready.getCohort(),
- ready.getModification());
+ (MutableCompositeModification) 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
}
private void closeTransactionChain(final CloseTransactionChain closeTransactionChain) {
- DOMStoreTransactionChain chain =
- transactionChains.remove(closeTransactionChain.getTransactionChainId());
-
- if(chain != null) {
- chain.close();
- }
+ transactionFactory.closeTransactionChain(closeTransactionChain.getTransactionChainId());
}
private ActorRef createTypedTransactionActor(int transactionType,
ShardTransactionIdentifier transactionId, String transactionChainId,
short clientVersion ) {
- DOMStoreTransactionFactory factory = store;
-
- if(!transactionChainId.isEmpty()) {
- factory = transactionChains.get(transactionChainId);
- if(factory == null){
- DOMStoreTransactionChain transactionChain = store.createTransactionChain();
- transactionChains.put(transactionChainId, transactionChain);
- factory = transactionChain;
- }
- }
-
- if(this.schemaContext == null) {
- throw new IllegalStateException("SchemaContext is not set");
- }
+ DOMStoreTransaction transaction = transactionFactory.newTransaction(
+ TransactionProxy.TransactionType.fromInt(transactionType), transactionId.toString(),
+ transactionChainId);
- if (transactionType == TransactionProxy.TransactionType.WRITE_ONLY.ordinal()) {
-
- shardMBean.incrementWriteOnlyTransactionCount();
-
- return createShardTransaction(factory.newWriteOnlyTransaction(), transactionId, clientVersion);
-
- } else if (transactionType == TransactionProxy.TransactionType.READ_WRITE.ordinal()) {
-
- shardMBean.incrementReadWriteTransactionCount();
-
- return createShardTransaction(factory.newReadWriteTransaction(), transactionId, clientVersion);
-
- } else if (transactionType == TransactionProxy.TransactionType.READ_ONLY.ordinal()) {
-
- shardMBean.incrementReadOnlyTransactionCount();
-
- return createShardTransaction(factory.newReadOnlyTransaction(), transactionId, clientVersion);
-
- } else {
- throw new IllegalArgumentException(
- "Shard="+name + ":CreateTransaction message has unidentified transaction type="
- + transactionType);
- }
+ return createShardTransaction(transaction, transactionId, clientVersion);
}
private ActorRef createShardTransaction(DOMStoreTransaction transaction, ShardTransactionIdentifier transactionId,
}
// If this actor is no longer the leader close all the transaction chains
- if(!isLeader){
- for(Map.Entry<String, DOMStoreTransactionChain> entry : transactionChains.entrySet()){
- if(LOG.isDebugEnabled()) {
- LOG.debug(
- "{}: onStateChanged: Closing transaction chain {} because shard {} is no longer the leader",
- persistenceId(), entry.getKey(), getId());
- }
- entry.getValue().close();
+ if(!isLeader) {
+ if(LOG.isDebugEnabled()) {
+ LOG.debug(
+ "{}: onStateChanged: Closing all transaction chains because shard {} is no longer the leader",
+ persistenceId(), getId());
}
- transactionChains.clear();
+ transactionFactory.closeAllTransactionChains();
}
}
}
@Override public String persistenceId() {
- return this.name.toString();
+ return this.name;
}
@VisibleForTesting
return dataPersistenceProvider;
}
+ @VisibleForTesting
+ ShardCommitCoordinator getCommitCoordinator() {
+ return commitCoordinator;
+ }
+
+
private static class ShardCreator implements Creator<Shard> {
private static final long serialVersionUID = 1L;
Code Review / controller.git / blobdiff