import akka.actor.ActorRef;
import akka.actor.ActorSelection;
import akka.actor.Cancellable;
+import akka.actor.ExtendedActorSystem;
import akka.actor.Props;
import akka.actor.Status;
import akka.actor.Status.Failure;
+import akka.serialization.JavaSerializer;
import akka.serialization.Serialization;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
import org.opendaylight.controller.cluster.access.commands.ConnectClientSuccess;
import org.opendaylight.controller.cluster.access.commands.LocalHistoryRequest;
import org.opendaylight.controller.cluster.access.commands.NotLeaderException;
+import org.opendaylight.controller.cluster.access.commands.OutOfSequenceEnvelopeException;
import org.opendaylight.controller.cluster.access.commands.TransactionRequest;
import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
import org.opendaylight.controller.cluster.access.concepts.FrontendIdentifier;
import org.opendaylight.controller.cluster.datastore.persisted.AbortTransactionPayload;
import org.opendaylight.controller.cluster.datastore.persisted.DatastoreSnapshot;
import org.opendaylight.controller.cluster.datastore.persisted.DatastoreSnapshot.ShardSnapshot;
+import org.opendaylight.controller.cluster.messaging.MessageAssembler;
import org.opendaylight.controller.cluster.messaging.MessageSlicer;
import org.opendaylight.controller.cluster.messaging.SliceOptions;
import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
private final FrontendMetadata frontendMetadata;
private Map<FrontendIdentifier, LeaderFrontendState> knownFrontends = ImmutableMap.of();
+ private boolean paused;
private final MessageSlicer responseMessageSlicer;
private final Dispatchers dispatchers;
+ private final MessageAssembler requestMessageAssembler;
+
protected Shard(final AbstractBuilder<?, ?> builder) {
super(builder.getId().toString(), builder.getPeerAddresses(),
Optional.of(builder.getDatastoreContext().getShardRaftConfig()), DataStoreVersions.CURRENT_VERSION);
.messageSliceSize(datastoreContext.getMaximumMessageSliceSize())
.fileBackedStreamFactory(getRaftActorContext().getFileBackedOutputStreamFactory())
.expireStateAfterInactivity(2, TimeUnit.MINUTES).build();
+
+ requestMessageAssembler = MessageAssembler.builder().logContext(this.name)
+ .fileBackedStreamFactory(getRaftActorContext().getFileBackedOutputStreamFactory())
+ .assembledMessageCallback((message, sender) -> self().tell(message, sender))
+ .expireStateAfterInactivity(datastoreContext.getRequestTimeout(), TimeUnit.NANOSECONDS).build();
}
private void setTransactionCommitTimeout() {
if (message instanceof RequestEnvelope) {
handleRequestEnvelope((RequestEnvelope)message);
+ } else if (requestMessageAssembler.isHandledMessage(message)) {
+ handleRequestAssemblerMessage(message);
} else if (message instanceof ConnectClientRequest) {
handleConnectClient((ConnectClientRequest)message);
} else if (CreateTransaction.isSerializedType(message)) {
PeerAddressResolved resolved = (PeerAddressResolved) message;
setPeerAddress(resolved.getPeerId(), resolved.getPeerAddress());
} else if (TX_COMMIT_TIMEOUT_CHECK_MESSAGE.equals(message)) {
- store.checkForExpiredTransactions(transactionCommitTimeout);
- commitCoordinator.checkForExpiredTransactions(transactionCommitTimeout, this);
+ commitTimeoutCheck();
} else if (message instanceof DatastoreContext) {
onDatastoreContext((DatastoreContext)message);
} else if (message instanceof RegisterRoleChangeListener) {
}
}
+ private void handleRequestAssemblerMessage(Object message) {
+ dispatchers.getDispatcher(DispatcherType.Serialization).execute(() -> {
+ JavaSerializer.currentSystem().value_$eq((ExtendedActorSystem) context().system());
+ requestMessageAssembler.handleMessage(message, self());
+ });
+ }
+
@SuppressWarnings("checkstyle:IllegalCatch")
private void handleRequestEnvelope(final RequestEnvelope envelope) {
final long now = ticker().read();
}
}
+ private void commitTimeoutCheck() {
+ store.checkForExpiredTransactions(transactionCommitTimeout, this::updateAccess);
+ commitCoordinator.checkForExpiredTransactions(transactionCommitTimeout, this);
+ requestMessageAssembler.checkExpiredAssembledMessageState();
+ }
+
+ private Optional<Long> updateAccess(final SimpleShardDataTreeCohort cohort) {
+ final FrontendIdentifier frontend = cohort.getIdentifier().getHistoryId().getClientId().getFrontendId();
+ final LeaderFrontendState state = knownFrontends.get(frontend);
+ if (state == null) {
+ // Not tell-based protocol, do nothing
+ return Optional.absent();
+ }
+
+ if (isIsolatedLeader()) {
+ // We are isolated and no new request can come through until we emerge from it. We are still updating
+ // liveness of frontend when we see it attempting to communicate. Use the last access timer.
+ return Optional.of(state.getLastSeenTicks());
+ }
+
+ // If this frontend has freshly connected, give it some time to catch up before killing its transactions.
+ return Optional.of(state.getLastConnectTicks());
+ }
+
private void onMakeLeaderLocal() {
LOG.debug("{}: onMakeLeaderLocal received", persistenceId());
if (isLeader()) {
}
// Acquire our frontend tracking handle and verify generation matches
- private LeaderFrontendState getFrontend(final ClientIdentifier clientId) throws RequestException {
+ @Nullable
+ private LeaderFrontendState findFrontend(final ClientIdentifier clientId) throws RequestException {
final LeaderFrontendState existing = knownFrontends.get(clientId.getFrontendId());
if (existing != null) {
final int cmp = Long.compareUnsigned(existing.getIdentifier().getGeneration(), clientId.getGeneration());
if (cmp == 0) {
+ existing.touch();
return existing;
}
if (cmp > 0) {
LOG.debug("{}: client {} is not yet known", persistenceId(), clientId);
}
- final LeaderFrontendState ret = new LeaderFrontendState(persistenceId(), clientId, store);
- knownFrontends.put(clientId.getFrontendId(), ret);
- LOG.debug("{}: created state {} for client {}", persistenceId(), ret, clientId);
- return ret;
+ return null;
+ }
+
+ private LeaderFrontendState getFrontend(final ClientIdentifier clientId) throws RequestException {
+ final LeaderFrontendState ret = findFrontend(clientId);
+ if (ret != null) {
+ return ret;
+ }
+
+ // TODO: a dedicated exception would be better, but this is technically true, too
+ throw new OutOfSequenceEnvelopeException(0);
}
private static @Nonnull ABIVersion selectVersion(final ConnectClientRequest message) {
@SuppressWarnings("checkstyle:IllegalCatch")
private void handleConnectClient(final ConnectClientRequest message) {
try {
+ final ClientIdentifier clientId = message.getTarget();
+ final LeaderFrontendState existing = findFrontend(clientId);
+ if (existing != null) {
+ existing.touch();
+ }
+
if (!isLeader() || !isLeaderActive()) {
LOG.info("{}: not currently leader, rejecting request {}. isLeader: {}, isLeaderActive: {},"
+ "isLeadershipTransferInProgress: {}.",
}
final ABIVersion selectedVersion = selectVersion(message);
- final LeaderFrontendState frontend = getFrontend(message.getTarget());
+ final LeaderFrontendState frontend;
+ if (existing == null) {
+ frontend = new LeaderFrontendState(persistenceId(), clientId, store);
+ knownFrontends.put(clientId.getFrontendId(), frontend);
+ LOG.debug("{}: created state {} for client {}", persistenceId(), frontend, clientId);
+ } else {
+ frontend = existing;
+ }
+
frontend.reconnect();
message.getReplyTo().tell(new ConnectClientSuccess(message.getTarget(), message.getSequence(), getSelf(),
ImmutableList.of(), store.getDataTree(), CLIENT_MAX_MESSAGES).toVersion(selectedVersion),
private @Nullable RequestSuccess<?, ?> handleRequest(final RequestEnvelope envelope, final long now)
throws RequestException {
// We are not the leader, hence we want to fail-fast.
- if (!isLeader() || !isLeaderActive()) {
- LOG.info("{}: not currently leader, rejecting request {}. isLeader: {}, isLeaderActive: {},"
- + "isLeadershipTransferInProgress: {}.",
- persistenceId(), envelope, isLeader(), isLeaderActive(), isLeadershipTransferInProgress());
+ if (!isLeader() || paused || !isLeaderActive()) {
+ LOG.debug("{}: not currently active leader, rejecting request {}. isLeader: {}, isLeaderActive: {},"
+ + "isLeadershipTransferInProgress: {}, paused: {}",
+ persistenceId(), envelope, isLeader(), isLeaderActive(), isLeadershipTransferInProgress(), paused);
throw new NotLeaderException(getSelf());
}
persistenceId(), getId());
}
+ paused = false;
store.purgeLeaderState();
}
@Override
protected void onLeaderChanged(final String oldLeader, final String newLeader) {
shardMBean.incrementLeadershipChangeCount();
+ paused = false;
- final boolean hasLeader = hasLeader();
- if (!hasLeader) {
- // No leader implies we are not the leader, lose frontend state if we have any. This also places
- // an explicit guard so the map will not get modified accidentally.
+ if (!isLeader()) {
if (!knownFrontends.isEmpty()) {
LOG.debug("{}: removing frontend state for {}", persistenceId(), knownFrontends.keySet());
knownFrontends = ImmutableMap.of();
}
- return;
- }
- if (!isLeader()) {
+ requestMessageAssembler.close();
+
+ if (!hasLeader()) {
+ // No leader anywhere, nothing else to do
+ return;
+ }
+
// Another leader was elected. If we were the previous leader and had pending transactions, convert
// them to transaction messages and send to the new leader.
ActorSelection leader = getLeader();
@Override
protected void pauseLeader(final Runnable operation) {
LOG.debug("{}: In pauseLeader, operation: {}", persistenceId(), operation);
+ paused = true;
+
+ // Tell-based protocol can replay transaction state, so it is safe to blow it up when we are paused.
+ knownFrontends.values().forEach(LeaderFrontendState::retire);
+ knownFrontends = ImmutableMap.of();
+
store.setRunOnPendingTransactionsComplete(operation);
}
+ @Override
+ protected void unpauseLeader() {
+ LOG.debug("{}: In unpauseLeader", persistenceId());
+ paused = false;
+
+ store.setRunOnPendingTransactionsComplete(null);
+
+ // Restore tell-based protocol state as if we were becoming the leader
+ knownFrontends = Verify.verifyNotNull(frontendMetadata.toLeaderState(this));
+ }
+
@Override
protected OnDemandRaftState.AbstractBuilder<?> newOnDemandRaftStateBuilder() {
return OnDemandShardState.newBuilder().treeChangeListenerActors(treeChangeSupport.getListenerActors())
Code Review / controller.git / blobdiff