package org.opendaylight.controller.cluster.datastore;
+import static akka.pattern.Patterns.ask;
import akka.actor.ActorPath;
import akka.actor.ActorRef;
import akka.actor.Address;
import akka.actor.Cancellable;
import akka.actor.OneForOneStrategy;
+import akka.actor.PoisonPill;
import akka.actor.Props;
import akka.actor.SupervisorStrategy;
import akka.cluster.ClusterEvent;
-import akka.japi.Creator;
+import akka.dispatch.OnComplete;
import akka.japi.Function;
-import akka.japi.Procedure;
import akka.persistence.RecoveryCompleted;
-import akka.persistence.RecoveryFailure;
+import akka.persistence.SaveSnapshotFailure;
+import akka.persistence.SaveSnapshotSuccess;
+import akka.persistence.SnapshotOffer;
import akka.serialization.Serialization;
+import akka.util.Timeout;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Objects;
+import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.base.Supplier;
-import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
-import org.opendaylight.controller.cluster.DataPersistenceProvider;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import javax.annotation.Nullable;
import org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActorWithMetering;
+import org.opendaylight.controller.cluster.datastore.config.Configuration;
+import org.opendaylight.controller.cluster.datastore.config.ModuleShardConfiguration;
+import org.opendaylight.controller.cluster.datastore.exceptions.AlreadyExistsException;
import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
import org.opendaylight.controller.cluster.datastore.exceptions.NotInitializedException;
import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
-import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shardmanager.ShardManagerInfo;
import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shardmanager.ShardManagerInfoMBean;
import org.opendaylight.controller.cluster.datastore.messages.ActorInitialized;
+import org.opendaylight.controller.cluster.datastore.messages.AddShardReplica;
+import org.opendaylight.controller.cluster.datastore.messages.CreateShard;
+import org.opendaylight.controller.cluster.datastore.messages.DatastoreSnapshot;
import org.opendaylight.controller.cluster.datastore.messages.FindLocalShard;
import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
+import org.opendaylight.controller.cluster.datastore.messages.LocalPrimaryShardFound;
import org.opendaylight.controller.cluster.datastore.messages.LocalShardFound;
import org.opendaylight.controller.cluster.datastore.messages.LocalShardNotFound;
import org.opendaylight.controller.cluster.datastore.messages.PeerAddressResolved;
-import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
+import org.opendaylight.controller.cluster.datastore.messages.PeerDown;
+import org.opendaylight.controller.cluster.datastore.messages.PeerUp;
+import org.opendaylight.controller.cluster.datastore.messages.RemoteFindPrimary;
+import org.opendaylight.controller.cluster.datastore.messages.RemotePrimaryShardFound;
+import org.opendaylight.controller.cluster.datastore.messages.RemoveShardReplica;
+import org.opendaylight.controller.cluster.datastore.messages.ShardLeaderStateChanged;
+import org.opendaylight.controller.cluster.datastore.messages.SwitchShardBehavior;
import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
import org.opendaylight.controller.cluster.datastore.utils.Dispatchers;
-import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
+import org.opendaylight.controller.cluster.datastore.utils.PrimaryShardInfoFutureCache;
import org.opendaylight.controller.cluster.notifications.RegisterRoleChangeListener;
import org.opendaylight.controller.cluster.notifications.RoleChangeNotification;
import org.opendaylight.controller.cluster.raft.RaftState;
import org.opendaylight.controller.cluster.raft.base.messages.FollowerInitialSyncUpStatus;
-import org.opendaylight.yangtools.yang.model.api.ModuleIdentifier;
+import org.opendaylight.controller.cluster.raft.base.messages.SwitchBehavior;
+import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshot;
+import org.opendaylight.controller.cluster.raft.messages.AddServer;
+import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
+import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
+import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
+import org.opendaylight.controller.cluster.raft.policy.DisableElectionsRaftPolicy;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
import org.opendaylight.yangtools.yang.model.api.SchemaContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+import scala.concurrent.Future;
import scala.concurrent.duration.Duration;
+import scala.concurrent.duration.FiniteDuration;
/**
* The ShardManager has the following jobs,
private static final Logger LOG = LoggerFactory.getLogger(ShardManager.class);
- // Stores a mapping between a member name and the address of the member
- // Member names look like "member-1", "member-2" etc and are as specified
- // in configuration
- private final Map<String, Address> memberNameToAddress = new HashMap<>();
-
// Stores a mapping between a shard name and it's corresponding information
// Shard names look like inventory, topology etc and are as specified in
// configuration
// A data store could be of type config/operational
private final String type;
- private final String shardManagerIdentifierString;
-
private final ClusterWrapper cluster;
private final Configuration configuration;
private final String shardDispatcherPath;
- private ShardManagerInfo mBean;
+ private final ShardManagerInfo mBean;
- private DatastoreContext datastoreContext;
+ private DatastoreContextFactory datastoreContextFactory;
- private Collection<String> knownModules = Collections.emptySet();
+ private final CountDownLatch waitTillReadyCountdownLatch;
- private final DataPersistenceProvider dataPersistenceProvider;
+ private final PrimaryShardInfoFutureCache primaryShardInfoCache;
- private final CountDownLatch waitTillReadyCountdownLatch;
+ private final ShardPeerAddressResolver peerAddressResolver;
+
+ private SchemaContext schemaContext;
+
+ private DatastoreSnapshot restoreFromSnapshot;
+
+ private final Set<String> shardReplicaOperationsInProgress = new HashSet<>();
+
+ private final String persistenceId;
/**
*/
- protected ShardManager(ClusterWrapper cluster, Configuration configuration,
- DatastoreContext datastoreContext, CountDownLatch waitTillReadyCountdownLatch) {
-
- this.cluster = Preconditions.checkNotNull(cluster, "cluster should not be null");
- this.configuration = Preconditions.checkNotNull(configuration, "configuration should not be null");
- this.datastoreContext = datastoreContext;
- this.dataPersistenceProvider = createDataPersistenceProvider(datastoreContext.isPersistent());
- this.type = datastoreContext.getDataStoreType();
- this.shardManagerIdentifierString = ShardManagerIdentifier.builder().type(type).build().toString();
+ protected ShardManager(Builder builder) {
+
+ this.cluster = builder.cluster;
+ this.configuration = builder.configuration;
+ this.datastoreContextFactory = builder.datastoreContextFactory;
+ this.type = builder.datastoreContextFactory.getBaseDatastoreContext().getDataStoreType();
this.shardDispatcherPath =
new Dispatchers(context().system().dispatchers()).getDispatcherPath(Dispatchers.DispatcherType.Shard);
- this.waitTillReadyCountdownLatch = waitTillReadyCountdownLatch;
-
- // Subscribe this actor to cluster member events
- cluster.subscribeToMemberEvents(getSelf());
+ this.waitTillReadyCountdownLatch = builder.waitTillReadyCountdownLatch;
+ this.primaryShardInfoCache = builder.primaryShardInfoCache;
+ this.restoreFromSnapshot = builder.restoreFromSnapshot;
- createLocalShards();
- }
-
- protected DataPersistenceProvider createDataPersistenceProvider(boolean persistent) {
- return (persistent) ? new PersistentDataProvider() : new NonPersistentDataProvider();
- }
+ String possiblePersistenceId = datastoreContextFactory.getBaseDatastoreContext().getShardManagerPersistenceId();
+ persistenceId = possiblePersistenceId != null ? possiblePersistenceId : "shard-manager-" + type;
- public static Props props(
- final ClusterWrapper cluster,
- final Configuration configuration,
- final DatastoreContext datastoreContext,
- final CountDownLatch waitTillReadyCountdownLatch) {
+ peerAddressResolver = new ShardPeerAddressResolver(type, cluster.getCurrentMemberName());
- Preconditions.checkNotNull(cluster, "cluster should not be null");
- Preconditions.checkNotNull(configuration, "configuration should not be null");
- Preconditions.checkNotNull(waitTillReadyCountdownLatch, "waitTillReadyCountdownLatch should not be null");
+ // Subscribe this actor to cluster member events
+ cluster.subscribeToMemberEvents(getSelf());
- return Props.create(new ShardManagerCreator(cluster, configuration, datastoreContext, waitTillReadyCountdownLatch));
+ List<String> localShardActorNames = new ArrayList<>();
+ mBean = ShardManagerInfo.createShardManagerMBean(cluster.getCurrentMemberName(),
+ "shard-manager-" + this.type,
+ datastoreContextFactory.getBaseDatastoreContext().getDataStoreMXBeanType(),
+ localShardActorNames);
+ mBean.setShardManager(this);
}
@Override
onActorInitialized(message);
} else if (message instanceof ClusterEvent.MemberUp){
memberUp((ClusterEvent.MemberUp) message);
+ } else if (message instanceof ClusterEvent.MemberExited){
+ memberExited((ClusterEvent.MemberExited) message);
} else if(message instanceof ClusterEvent.MemberRemoved) {
memberRemoved((ClusterEvent.MemberRemoved) message);
} else if(message instanceof ClusterEvent.UnreachableMember) {
- ignoreMessage(message);
- } else if(message instanceof DatastoreContext) {
- onDatastoreContext((DatastoreContext)message);
+ memberUnreachable((ClusterEvent.UnreachableMember)message);
+ } else if(message instanceof ClusterEvent.ReachableMember) {
+ memberReachable((ClusterEvent.ReachableMember) message);
+ } else if(message instanceof DatastoreContextFactory) {
+ onDatastoreContextFactory((DatastoreContextFactory)message);
} else if(message instanceof RoleChangeNotification) {
onRoleChangeNotification((RoleChangeNotification) message);
} else if(message instanceof FollowerInitialSyncUpStatus){
onFollowerInitialSyncStatus((FollowerInitialSyncUpStatus) message);
} else if(message instanceof ShardNotInitializedTimeout) {
onShardNotInitializedTimeout((ShardNotInitializedTimeout)message);
- } else if(message instanceof LeaderStateChanged) {
- onLeaderStateChanged((LeaderStateChanged)message);
+ } else if(message instanceof ShardLeaderStateChanged) {
+ onLeaderStateChanged((ShardLeaderStateChanged) message);
+ } else if(message instanceof SwitchShardBehavior){
+ onSwitchShardBehavior((SwitchShardBehavior) message);
+ } else if(message instanceof CreateShard) {
+ onCreateShard((CreateShard)message);
+ } else if(message instanceof AddShardReplica){
+ onAddShardReplica((AddShardReplica)message);
+ } else if(message instanceof ForwardedAddServerReply) {
+ ForwardedAddServerReply msg = (ForwardedAddServerReply)message;
+ onAddServerReply(msg.shardInfo, msg.addServerReply, getSender(), msg.leaderPath,
+ msg.removeShardOnFailure);
+ } else if(message instanceof ForwardedAddServerFailure) {
+ ForwardedAddServerFailure msg = (ForwardedAddServerFailure)message;
+ onAddServerFailure(msg.shardName, msg.failureMessage, msg.failure, getSender(), msg.removeShardOnFailure);
+ } else if(message instanceof ForwardedAddServerPrimaryShardFound) {
+ ForwardedAddServerPrimaryShardFound msg = (ForwardedAddServerPrimaryShardFound)message;
+ addShard(msg.shardName, msg.primaryFound, getSender());
+ } else if(message instanceof RemoveShardReplica){
+ onRemoveShardReplica((RemoveShardReplica)message);
+ } else if(message instanceof GetSnapshot) {
+ onGetSnapshot();
+ } else if(message instanceof ServerRemoved){
+ onShardReplicaRemoved((ServerRemoved) message);
+ } else if (message instanceof SaveSnapshotSuccess) {
+ LOG.debug("{} saved ShardManager snapshot successfully", persistenceId());
+ } else if (message instanceof SaveSnapshotFailure) {
+ LOG.error ("{}: SaveSnapshotFailure received for saving snapshot of shards",
+ persistenceId(), ((SaveSnapshotFailure)message).cause());
} else {
unknownMessage(message);
}
+ }
+ private void onShardReplicaRemoved(ServerRemoved message) {
+ final ShardIdentifier shardId = new ShardIdentifier.Builder().fromShardIdString(message.getServerId()).build();
+ final ShardInformation shardInformation = localShards.remove(shardId.getShardName());
+ if(shardInformation == null) {
+ LOG.debug("{} : Shard replica {} is not present in list", persistenceId(), shardId.toString());
+ return;
+ } else if(shardInformation.getActor() != null) {
+ LOG.debug("{} : Sending PoisonPill to Shard actor {}", persistenceId(), shardInformation.getActor());
+ shardInformation.getActor().tell(PoisonPill.getInstance(), self());
+ }
+ LOG.debug("{} : Local Shard replica for shard {} has been removed", persistenceId(), shardId.getShardName());
+ persistShardList();
}
- private void onLeaderStateChanged(LeaderStateChanged leaderStateChanged) {
+ private void onGetSnapshot() {
+ LOG.debug("{}: onGetSnapshot", persistenceId());
+
+ List<String> notInitialized = null;
+ for(ShardInformation shardInfo: localShards.values()) {
+ if(!shardInfo.isShardInitialized()) {
+ if(notInitialized == null) {
+ notInitialized = new ArrayList<>();
+ }
+
+ notInitialized.add(shardInfo.getShardName());
+ }
+ }
+
+ if(notInitialized != null) {
+ getSender().tell(new akka.actor.Status.Failure(new IllegalStateException(String.format(
+ "%d shard(s) %s are not initialized", notInitialized.size(), notInitialized))), getSelf());
+ return;
+ }
+
+ byte[] shardManagerSnapshot = null;
+ ActorRef replyActor = getContext().actorOf(ShardManagerGetSnapshotReplyActor.props(
+ new ArrayList<>(localShards.keySet()), type, shardManagerSnapshot , getSender(), persistenceId(),
+ datastoreContextFactory.getBaseDatastoreContext().getShardInitializationTimeout().duration()));
+
+ for(ShardInformation shardInfo: localShards.values()) {
+ shardInfo.getActor().tell(GetSnapshot.INSTANCE, replyActor);
+ }
+ }
+
+ private void onCreateShard(CreateShard createShard) {
+ Object reply;
+ try {
+ String shardName = createShard.getModuleShardConfig().getShardName();
+ if(localShards.containsKey(shardName)) {
+ reply = new akka.actor.Status.Success(String.format("Shard with name %s already exists", shardName));
+ } else {
+ doCreateShard(createShard);
+ reply = new akka.actor.Status.Success(null);
+ }
+ } catch (Exception e) {
+ LOG.error("onCreateShard failed", e);
+ reply = new akka.actor.Status.Failure(e);
+ }
+
+ if(getSender() != null && !getContext().system().deadLetters().equals(getSender())) {
+ getSender().tell(reply, getSelf());
+ }
+ }
+
+ private void doCreateShard(CreateShard createShard) {
+ ModuleShardConfiguration moduleShardConfig = createShard.getModuleShardConfig();
+ String shardName = moduleShardConfig.getShardName();
+
+ configuration.addModuleShardConfiguration(moduleShardConfig);
+
+ DatastoreContext shardDatastoreContext = createShard.getDatastoreContext();
+ if(shardDatastoreContext == null) {
+ shardDatastoreContext = newShardDatastoreContext(shardName);
+ } else {
+ shardDatastoreContext = DatastoreContext.newBuilderFrom(shardDatastoreContext).shardPeerAddressResolver(
+ peerAddressResolver).build();
+ }
+
+ ShardIdentifier shardId = getShardIdentifier(cluster.getCurrentMemberName(), shardName);
+
+ Map<String, String> peerAddresses;
+ boolean isActiveMember;
+ if(configuration.getMembersFromShardName(shardName).contains(cluster.getCurrentMemberName())) {
+ peerAddresses = getPeerAddresses(shardName);
+ isActiveMember = true;
+ } else {
+ // The local member is not in the given shard member configuration. In this case we'll create
+ // the shard with no peers and with elections disabled so it stays as follower. A
+ // subsequent AddServer request will be needed to make it an active member.
+ isActiveMember = false;
+ peerAddresses = Collections.emptyMap();
+ shardDatastoreContext = DatastoreContext.newBuilderFrom(shardDatastoreContext).
+ customRaftPolicyImplementation(DisableElectionsRaftPolicy.class.getName()).build();
+ }
+
+ LOG.debug("onCreateShard: shardId: {}, memberNames: {}. peerAddresses: {}", shardId,
+ moduleShardConfig.getShardMemberNames(), peerAddresses);
+
+ ShardInformation info = new ShardInformation(shardName, shardId, peerAddresses,
+ shardDatastoreContext, createShard.getShardBuilder(), peerAddressResolver);
+ info.setActiveMember(isActiveMember);
+ localShards.put(info.getShardName(), info);
+
+ mBean.addLocalShard(shardId.toString());
+
+ if(schemaContext != null) {
+ info.setActor(newShardActor(schemaContext, info));
+ }
+ }
+
+ private DatastoreContext.Builder newShardDatastoreContextBuilder(String shardName) {
+ return DatastoreContext.newBuilderFrom(datastoreContextFactory.getShardDatastoreContext(shardName)).
+ shardPeerAddressResolver(peerAddressResolver);
+ }
+
+ private DatastoreContext newShardDatastoreContext(String shardName) {
+ return newShardDatastoreContextBuilder(shardName).build();
+ }
+
+ private void checkReady(){
+ if (isReadyWithLeaderId()) {
+ LOG.info("{}: All Shards are ready - data store {} is ready, available count is {}",
+ persistenceId(), type, waitTillReadyCountdownLatch.getCount());
+
+ waitTillReadyCountdownLatch.countDown();
+ }
+ }
+
+ private void onLeaderStateChanged(ShardLeaderStateChanged leaderStateChanged) {
LOG.info("{}: Received LeaderStateChanged message: {}", persistenceId(), leaderStateChanged);
ShardInformation shardInformation = findShardInformation(leaderStateChanged.getMemberId());
if(shardInformation != null) {
- shardInformation.setLeaderId(leaderStateChanged.getLeaderId());
+ shardInformation.setLocalDataTree(leaderStateChanged.getLocalShardDataTree());
+ shardInformation.setLeaderVersion(leaderStateChanged.getLeaderPayloadVersion());
+ if(shardInformation.setLeaderId(leaderStateChanged.getLeaderId())) {
+ primaryShardInfoCache.remove(shardInformation.getShardName());
+ }
+
+ checkReady();
} else {
LOG.debug("No shard found with member Id {}", leaderStateChanged.getMemberId());
}
ShardInformation shardInformation = findShardInformation(roleChanged.getMemberId());
if(shardInformation != null) {
shardInformation.setRole(roleChanged.getNewRole());
-
- if (isReady()) {
- LOG.info("{}: All Shards are ready - data store {} is ready, available count is {}",
- persistenceId(), type, waitTillReadyCountdownLatch.getCount());
-
- waitTillReadyCountdownLatch.countDown();
- }
-
+ checkReady();
mBean.setSyncStatus(isInSync());
}
}
return null;
}
- private boolean isReady() {
+ private boolean isReadyWithLeaderId() {
boolean isReady = true;
for (ShardInformation info : localShards.values()) {
- if(!info.isShardReady()){
+ if(!info.isShardReadyWithLeaderId()){
isReady = false;
break;
}
@Override
protected void handleRecover(Object message) throws Exception {
- if(dataPersistenceProvider.isRecoveryApplicable()) {
- if (message instanceof SchemaContextModules) {
- SchemaContextModules msg = (SchemaContextModules) message;
- knownModules = ImmutableSet.copyOf(msg.getModules());
- } else if (message instanceof RecoveryFailure) {
- RecoveryFailure failure = (RecoveryFailure) message;
- LOG.error("Recovery failed", failure.cause());
- } else if (message instanceof RecoveryCompleted) {
- LOG.info("Recovery complete : {}", persistenceId());
-
- // Delete all the messages from the akka journal except the last one
- deleteMessages(lastSequenceNr() - 1);
- }
- } else {
- if (message instanceof RecoveryCompleted) {
- LOG.info("Recovery complete : {}", persistenceId());
-
- // Delete all the messages from the akka journal
- deleteMessages(lastSequenceNr());
- }
+ if (message instanceof RecoveryCompleted) {
+ LOG.info("Recovery complete : {}", persistenceId());
+
+ // We no longer persist SchemaContext modules so delete all the prior messages from the akka
+ // journal on upgrade from Helium.
+ deleteMessages(lastSequenceNr());
+ createLocalShards();
+ } else if (message instanceof SnapshotOffer) {
+ handleShardRecovery((SnapshotOffer) message);
}
}
shardInformation.addOnShardInitialized(onShardInitialized);
- LOG.debug("{}: Scheduling timer to wait for shard {}", persistenceId(), shardInformation.getShardName());
+ FiniteDuration timeout = shardInformation.getDatastoreContext().getShardInitializationTimeout().duration();
+ if(shardInformation.isShardInitialized()) {
+ // If the shard is already initialized then we'll wait enough time for the shard to
+ // elect a leader, ie 2 times the election timeout.
+ timeout = FiniteDuration.create(shardInformation.getDatastoreContext().getShardRaftConfig()
+ .getElectionTimeOutInterval().toMillis() * 2, TimeUnit.MILLISECONDS);
+ }
+
+ LOG.debug("{}: Scheduling {} ms timer to wait for shard {}", persistenceId(), timeout.toMillis(),
+ shardInformation.getShardName());
Cancellable timeoutSchedule = getContext().system().scheduler().scheduleOnce(
- datastoreContext.getShardInitializationTimeout().duration(), getSelf(),
+ timeout, getSelf(),
new ShardNotInitializedTimeout(shardInformation, onShardInitialized, sender),
getContext().dispatcher(), getSelf());
getSender().tell(messageSupplier.get(), getSelf());
}
- private NoShardLeaderException createNoShardLeaderException(ShardIdentifier shardId) {
- return new NoShardLeaderException(String.format(
- "Could not find a leader for shard %s. This typically happens when the system is coming up or " +
- "recovering and a leader is being elected. Try again later.", shardId));
+ private static NoShardLeaderException createNoShardLeaderException(ShardIdentifier shardId) {
+ return new NoShardLeaderException(null, shardId.toString());
}
- private NotInitializedException createNotInitializedException(ShardIdentifier shardId) {
+ private static NotInitializedException createNotInitializedException(ShardIdentifier shardId) {
return new NotInitializedException(String.format(
"Found primary shard %s but it's not initialized yet. Please try again later", shardId));
}
LOG.debug("{}: Received MemberRemoved: memberName: {}, address: {}", persistenceId(), memberName,
message.member().address());
- memberNameToAddress.remove(message.member().roles().head());
+ peerAddressResolver.removePeerAddress(memberName);
+
+ for(ShardInformation info : localShards.values()){
+ info.peerDown(memberName, getShardIdentifier(memberName, info.getShardName()).toString(), getSelf());
+ }
+ }
+
+ private void memberExited(ClusterEvent.MemberExited message) {
+ String memberName = message.member().roles().head();
+
+ LOG.debug("{}: Received MemberExited: memberName: {}, address: {}", persistenceId(), memberName,
+ message.member().address());
+
+ peerAddressResolver.removePeerAddress(memberName);
+
+ for(ShardInformation info : localShards.values()){
+ info.peerDown(memberName, getShardIdentifier(memberName, info.getShardName()).toString(), getSelf());
+ }
}
private void memberUp(ClusterEvent.MemberUp message) {
LOG.debug("{}: Received MemberUp: memberName: {}, address: {}", persistenceId(), memberName,
message.member().address());
- memberNameToAddress.put(memberName, message.member().address());
+ addPeerAddress(memberName, message.member().address());
+
+ checkReady();
+ }
+
+ private void addPeerAddress(String memberName, Address address) {
+ peerAddressResolver.addPeerAddress(memberName, address);
for(ShardInformation info : localShards.values()){
String shardName = info.getShardName();
- info.updatePeerAddress(getShardIdentifier(memberName, shardName).toString(),
- getShardActorPath(shardName, memberName), getSelf());
+ String peerId = getShardIdentifier(memberName, shardName).toString();
+ info.updatePeerAddress(peerId, peerAddressResolver.getShardActorAddress(shardName, memberName), getSelf());
+
+ info.peerUp(memberName, peerId, getSelf());
}
}
- private void onDatastoreContext(DatastoreContext context) {
- datastoreContext = context;
- for (ShardInformation info : localShards.values()) {
- if (info.getActor() != null) {
- info.getActor().tell(datastoreContext, getSelf());
- }
- }
+ private void memberReachable(ClusterEvent.ReachableMember message) {
+ String memberName = message.member().roles().head();
+ LOG.debug("Received ReachableMember: memberName {}, address: {}", memberName, message.member().address());
+
+ addPeerAddress(memberName, message.member().address());
+
+ markMemberAvailable(memberName);
}
- /**
- * Notifies all the local shards of a change in the schema context
- *
- * @param message
- */
- private void updateSchemaContext(final Object message) {
- final SchemaContext schemaContext = ((UpdateSchemaContext) message).getSchemaContext();
+ private void memberUnreachable(ClusterEvent.UnreachableMember message) {
+ String memberName = message.member().roles().head();
+ LOG.debug("Received UnreachableMember: memberName {}, address: {}", memberName, message.member().address());
- Set<ModuleIdentifier> allModuleIdentifiers = schemaContext.getAllModuleIdentifiers();
- Set<String> newModules = new HashSet<>(128);
+ markMemberUnavailable(memberName);
+ }
- for(ModuleIdentifier moduleIdentifier : allModuleIdentifiers){
- String s = moduleIdentifier.getNamespace().toString();
- newModules.add(s);
+ private void markMemberUnavailable(final String memberName) {
+ for(ShardInformation info : localShards.values()){
+ String leaderId = info.getLeaderId();
+ if(leaderId != null && leaderId.contains(memberName)) {
+ LOG.debug("Marking Leader {} as unavailable.", leaderId);
+ info.setLeaderAvailable(false);
+
+ primaryShardInfoCache.remove(info.getShardName());
+ }
+
+ info.peerDown(memberName, getShardIdentifier(memberName, info.getShardName()).toString(), getSelf());
}
+ }
- if(newModules.containsAll(knownModules)) {
+ private void markMemberAvailable(final String memberName) {
+ for(ShardInformation info : localShards.values()){
+ String leaderId = info.getLeaderId();
+ if(leaderId != null && leaderId.contains(memberName)) {
+ LOG.debug("Marking Leader {} as available.", leaderId);
+ info.setLeaderAvailable(true);
+ }
- LOG.debug("New SchemaContext has a super set of current knownModules - persisting info");
+ info.peerUp(memberName, getShardIdentifier(memberName, info.getShardName()).toString(), getSelf());
+ }
+ }
- knownModules = ImmutableSet.copyOf(newModules);
+ private void onDatastoreContextFactory(DatastoreContextFactory factory) {
+ datastoreContextFactory = factory;
+ for (ShardInformation info : localShards.values()) {
+ info.setDatastoreContext(newShardDatastoreContext(info.getShardName()), getSelf());
+ }
+ }
- dataPersistenceProvider.persist(new SchemaContextModules(newModules), new Procedure<SchemaContextModules>() {
+ private void onSwitchShardBehavior(SwitchShardBehavior message) {
+ ShardIdentifier identifier = ShardIdentifier.builder().fromShardIdString(message.getShardName()).build();
- @Override
- public void apply(SchemaContextModules param) throws Exception {
- LOG.debug("Sending new SchemaContext to Shards");
- for (ShardInformation info : localShards.values()) {
- if (info.getActor() == null) {
- info.setActor(newShardActor(schemaContext, info));
- } else {
- info.getActor().tell(message, getSelf());
- }
- }
- }
+ ShardInformation shardInformation = localShards.get(identifier.getShardName());
- });
+ if(shardInformation != null && shardInformation.getActor() != null) {
+ shardInformation.getActor().tell(
+ new SwitchBehavior(RaftState.valueOf(message.getNewState()), message.getTerm()), getSelf());
} else {
- LOG.debug("Rejecting schema context update - not a super set of previously known modules:\nUPDATE: {}\nKNOWN: {}",
- newModules, knownModules);
+ LOG.warn("Could not switch the behavior of shard {} to {} - shard is not yet available",
+ message.getShardName(), message.getNewState());
}
+ }
+ /**
+ * Notifies all the local shards of a change in the schema context
+ *
+ * @param message
+ */
+ private void updateSchemaContext(final Object message) {
+ schemaContext = ((UpdateSchemaContext) message).getSchemaContext();
+
+ LOG.debug("Got updated SchemaContext: # of modules {}", schemaContext.getAllModuleIdentifiers().size());
+
+ for (ShardInformation info : localShards.values()) {
+ if (info.getActor() == null) {
+ LOG.debug("Creating Shard {}", info.getShardId());
+ info.setActor(newShardActor(schemaContext, info));
+ } else {
+ info.getActor().tell(message, getSelf());
+ }
+ }
}
@VisibleForTesting
@VisibleForTesting
protected ActorRef newShardActor(final SchemaContext schemaContext, ShardInformation info) {
- return getContext().actorOf(Shard.props(info.getShardId(),
- info.getPeerAddresses(), datastoreContext, schemaContext)
- .withDispatcher(shardDispatcherPath), info.getShardId().toString());
+ return getContext().actorOf(info.newProps(schemaContext)
+ .withDispatcher(shardDispatcherPath), info.getShardId().toString());
}
private void findPrimary(FindPrimary message) {
LOG.debug("{}: In findPrimary: {}", persistenceId(), message);
final String shardName = message.getShardName();
+ final boolean canReturnLocalShardState = !(message instanceof RemoteFindPrimary);
// First see if the there is a local replica for the shard
final ShardInformation info = localShards.get(shardName);
- if (info != null) {
+ if (info != null && info.isActiveMember()) {
sendResponse(info, message.isWaitUntilReady(), true, new Supplier<Object>() {
@Override
public Object get() {
- Object found = new PrimaryFound(info.getSerializedLeaderActor());
+ String primaryPath = info.getSerializedLeaderActor();
+ Object found = canReturnLocalShardState && info.isLeader() ?
+ new LocalPrimaryShardFound(primaryPath, info.getLocalShardDataTree().get()) :
+ new RemotePrimaryShardFound(primaryPath, info.getLeaderVersion());
- if(LOG.isDebugEnabled()) {
- LOG.debug("{}: Found primary for {}: {}", persistenceId(), shardName, found);
- }
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("{}: Found primary for {}: {}", persistenceId(), shardName, found);
+ }
- return found;
+ return found;
}
});
return;
}
- for(Map.Entry<String, Address> entry: memberNameToAddress.entrySet()) {
- if(!cluster.getCurrentMemberName().equals(entry.getKey())) {
- String path = getShardManagerActorPathBuilder(entry.getValue()).toString();
-
- LOG.debug("{}: findPrimary for {} forwarding to remote ShardManager {}", persistenceId(),
- shardName, path);
+ for(String address: peerAddressResolver.getShardManagerPeerActorAddresses()) {
+ LOG.debug("{}: findPrimary for {} forwarding to remote ShardManager {}", persistenceId(),
+ shardName, address);
- getContext().actorSelection(path).forward(message, getContext());
- return;
- }
+ getContext().actorSelection(address).forward(new RemoteFindPrimary(shardName,
+ message.isWaitUntilReady()), getContext());
+ return;
}
LOG.debug("{}: No shard found for {}", persistenceId(), shardName);
String.format("No primary shard found for %s.", shardName)), getSelf());
}
- private StringBuilder getShardManagerActorPathBuilder(Address address) {
- StringBuilder builder = new StringBuilder();
- builder.append(address.toString()).append("/user/").append(shardManagerIdentifierString);
- return builder;
- }
-
- private String getShardActorPath(String shardName, String memberName) {
- Address address = memberNameToAddress.get(memberName);
- if(address != null) {
- StringBuilder builder = getShardManagerActorPathBuilder(address);
- builder.append("/")
- .append(getShardIdentifier(memberName, shardName));
- return builder.toString();
- }
- return null;
- }
-
/**
* Construct the name of the shard actor given the name of the member on
* which the shard resides and the name of the shard
* @return
*/
private ShardIdentifier getShardIdentifier(String memberName, String shardName){
- return ShardIdentifier.builder().memberName(memberName).shardName(shardName).type(type).build();
+ return peerAddressResolver.getShardIdentifier(memberName, shardName);
}
/**
*/
private void createLocalShards() {
String memberName = this.cluster.getCurrentMemberName();
- List<String> memberShardNames =
- this.configuration.getMemberShardNames(memberName);
+ Collection<String> memberShardNames = this.configuration.getMemberShardNames(memberName);
+
+ Map<String, DatastoreSnapshot.ShardSnapshot> shardSnapshots = new HashMap<>();
+ if(restoreFromSnapshot != null)
+ {
+ for(DatastoreSnapshot.ShardSnapshot snapshot: restoreFromSnapshot.getShardSnapshots()) {
+ shardSnapshots.put(snapshot.getName(), snapshot);
+ }
+ }
+
+ restoreFromSnapshot = null; // null out to GC
- List<String> localShardActorNames = new ArrayList<>();
for(String shardName : memberShardNames){
ShardIdentifier shardId = getShardIdentifier(memberName, shardName);
Map<String, String> peerAddresses = getPeerAddresses(shardName);
- localShardActorNames.add(shardId.toString());
- localShards.put(shardName, new ShardInformation(shardName, shardId, peerAddresses));
+ localShards.put(shardName, new ShardInformation(shardName, shardId, peerAddresses,
+ newShardDatastoreContext(shardName), Shard.builder().restoreFromSnapshot(
+ shardSnapshots.get(shardName)), peerAddressResolver));
+ mBean.addLocalShard(shardId.toString());
}
-
- mBean = ShardManagerInfo.createShardManagerMBean("shard-manager-" + this.type,
- datastoreContext.getDataStoreMXBeanType(), localShardActorNames);
}
/**
* Given the name of the shard find the addresses of all it's peers
*
* @param shardName
- * @return
*/
- private Map<String, String> getPeerAddresses(String shardName){
-
+ private Map<String, String> getPeerAddresses(String shardName) {
+ Collection<String> members = configuration.getMembersFromShardName(shardName);
Map<String, String> peerAddresses = new HashMap<>();
- List<String> members = this.configuration.getMembersFromShardName(shardName);
-
String currentMemberName = this.cluster.getCurrentMemberName();
- for(String memberName : members){
- if(!currentMemberName.equals(memberName)){
+ for(String memberName : members) {
+ if(!currentMemberName.equals(memberName)) {
ShardIdentifier shardId = getShardIdentifier(memberName, shardName);
- String path = getShardActorPath(shardName, currentMemberName);
- peerAddresses.put(shardId.toString(), path);
+ String address = peerAddressResolver.getShardActorAddress(shardName, memberName);
+ peerAddresses.put(shardId.toString(), address);
}
}
return peerAddresses;
public SupervisorStrategy supervisorStrategy() {
return new OneForOneStrategy(10, Duration.create("1 minute"),
- new Function<Throwable, SupervisorStrategy.Directive>() {
- @Override
- public SupervisorStrategy.Directive apply(Throwable t) {
- LOG.warn("Supervisor Strategy caught unexpected exception - resuming", t);
- return SupervisorStrategy.resume();
- }
+ new Function<Throwable, SupervisorStrategy.Directive>() {
+ @Override
+ public SupervisorStrategy.Directive apply(Throwable t) {
+ LOG.warn("Supervisor Strategy caught unexpected exception - resuming", t);
+ return SupervisorStrategy.resume();
}
- );
+ }
+ );
}
@Override
public String persistenceId() {
- return "shard-manager-" + type;
+ return persistenceId;
}
@VisibleForTesting
- Collection<String> getKnownModules() {
- return knownModules;
+ ShardManagerInfoMBean getMBean(){
+ return mBean;
}
- @VisibleForTesting
- DataPersistenceProvider getDataPersistenceProvider() {
- return dataPersistenceProvider;
+ private boolean isShardReplicaOperationInProgress(final String shardName, final ActorRef sender) {
+ if (shardReplicaOperationsInProgress.contains(shardName)) {
+ String msg = String.format("A shard replica operation for %s is already in progress", shardName);
+ LOG.debug ("{}: {}", persistenceId(), msg);
+ sender.tell(new akka.actor.Status.Failure(new IllegalStateException(msg)), getSelf());
+ return true;
+ }
+
+ return false;
}
- @VisibleForTesting
- ShardManagerInfoMBean getMBean(){
- return mBean;
+ private void onAddShardReplica (AddShardReplica shardReplicaMsg) {
+ final String shardName = shardReplicaMsg.getShardName();
+
+ LOG.debug("{}: onAddShardReplica: {}", persistenceId(), shardReplicaMsg);
+
+ // verify the shard with the specified name is present in the cluster configuration
+ if (!(this.configuration.isShardConfigured(shardName))) {
+ String msg = String.format("No module configuration exists for shard %s", shardName);
+ LOG.debug ("{}: {}", persistenceId(), msg);
+ getSender().tell(new akka.actor.Status.Failure(new IllegalArgumentException(msg)), getSelf());
+ return;
+ }
+
+ // Create the localShard
+ if (schemaContext == null) {
+ String msg = String.format(
+ "No SchemaContext is available in order to create a local shard instance for %s", shardName);
+ LOG.debug ("{}: {}", persistenceId(), msg);
+ getSender().tell(new akka.actor.Status.Failure(new IllegalStateException(msg)), getSelf());
+ return;
+ }
+
+ Timeout findPrimaryTimeout = new Timeout(datastoreContextFactory.getBaseDatastoreContext().
+ getShardInitializationTimeout().duration().$times(2));
+
+ final ActorRef sender = getSender();
+ Future<Object> futureObj = ask(getSelf(), new FindPrimary(shardName, true), findPrimaryTimeout);
+ futureObj.onComplete(new OnComplete<Object>() {
+ @Override
+ public void onComplete(Throwable failure, Object response) {
+ if (failure != null) {
+ LOG.debug ("{}: Received failure from FindPrimary for shard {}", persistenceId(), shardName, failure);
+ sender.tell(new akka.actor.Status.Failure(new RuntimeException(
+ String.format("Failed to find leader for shard %s", shardName), failure)), getSelf());
+ } else {
+ if(response instanceof RemotePrimaryShardFound) {
+ self().tell(new ForwardedAddServerPrimaryShardFound(shardName,
+ (RemotePrimaryShardFound)response), sender);
+ } else if(response instanceof LocalPrimaryShardFound) {
+ sendLocalReplicaAlreadyExistsReply(shardName, sender);
+ } else {
+ String msg = String.format("Failed to find leader for shard %s: received response: %s",
+ shardName, response);
+ LOG.debug ("{}: {}", persistenceId(), msg);
+ sender.tell(new akka.actor.Status.Failure(response instanceof Throwable ? (Throwable)response :
+ new RuntimeException(msg)), getSelf());
+ }
+ }
+ }
+ }, new Dispatchers(context().system().dispatchers()).getDispatcher(Dispatchers.DispatcherType.Client));
+ }
+
+ private void sendLocalReplicaAlreadyExistsReply(String shardName, ActorRef sender) {
+ String msg = String.format("Local shard %s already exists", shardName);
+ LOG.debug ("{}: {}", persistenceId(), msg);
+ sender.tell(new akka.actor.Status.Failure(new AlreadyExistsException(msg)), getSelf());
+ }
+
+ private void addShard(final String shardName, final RemotePrimaryShardFound response, final ActorRef sender) {
+ if(isShardReplicaOperationInProgress(shardName, sender)) {
+ return;
+ }
+
+ shardReplicaOperationsInProgress.add(shardName);
+
+ final ShardInformation shardInfo;
+ final boolean removeShardOnFailure;
+ ShardInformation existingShardInfo = localShards.get(shardName);
+ if(existingShardInfo == null) {
+ removeShardOnFailure = true;
+ ShardIdentifier shardId = getShardIdentifier(cluster.getCurrentMemberName(), shardName);
+
+ DatastoreContext datastoreContext = newShardDatastoreContextBuilder(shardName).customRaftPolicyImplementation(
+ DisableElectionsRaftPolicy.class.getName()).build();
+
+ shardInfo = new ShardInformation(shardName, shardId, getPeerAddresses(shardName), datastoreContext,
+ Shard.builder(), peerAddressResolver);
+ shardInfo.setActiveMember(false);
+ localShards.put(shardName, shardInfo);
+ shardInfo.setActor(newShardActor(schemaContext, shardInfo));
+ } else {
+ removeShardOnFailure = false;
+ shardInfo = existingShardInfo;
+ }
+
+ String localShardAddress = peerAddressResolver.getShardActorAddress(shardName, cluster.getCurrentMemberName());
+
+ //inform ShardLeader to add this shard as a replica by sending an AddServer message
+ LOG.debug ("{}: Sending AddServer message to peer {} for shard {}", persistenceId(),
+ response.getPrimaryPath(), shardInfo.getShardId());
+
+ Timeout addServerTimeout = new Timeout(shardInfo.getDatastoreContext().getShardLeaderElectionTimeout().
+ duration());
+ Future<Object> futureObj = ask(getContext().actorSelection(response.getPrimaryPath()),
+ new AddServer(shardInfo.getShardId().toString(), localShardAddress, true), addServerTimeout);
+
+ futureObj.onComplete(new OnComplete<Object>() {
+ @Override
+ public void onComplete(Throwable failure, Object addServerResponse) {
+ if (failure != null) {
+ LOG.debug ("{}: AddServer request to {} for {} failed", persistenceId(),
+ response.getPrimaryPath(), shardName, failure);
+
+ String msg = String.format("AddServer request to leader %s for shard %s failed",
+ response.getPrimaryPath(), shardName);
+ self().tell(new ForwardedAddServerFailure(shardName, msg, failure, removeShardOnFailure), sender);
+ } else {
+ self().tell(new ForwardedAddServerReply(shardInfo, (AddServerReply)addServerResponse,
+ response.getPrimaryPath(), removeShardOnFailure), sender);
+ }
+ }
+ }, new Dispatchers(context().system().dispatchers()).getDispatcher(Dispatchers.DispatcherType.Client));
+ }
+
+ private void onAddServerFailure(String shardName, String message, Throwable failure, ActorRef sender,
+ boolean removeShardOnFailure) {
+ shardReplicaOperationsInProgress.remove(shardName);
+
+ if(removeShardOnFailure) {
+ ShardInformation shardInfo = localShards.remove(shardName);
+ if (shardInfo.getActor() != null) {
+ shardInfo.getActor().tell(PoisonPill.getInstance(), getSelf());
+ }
+ }
+
+ sender.tell(new akka.actor.Status.Failure(message == null ? failure :
+ new RuntimeException(message, failure)), getSelf());
+ }
+
+ private void onAddServerReply(ShardInformation shardInfo, AddServerReply replyMsg, ActorRef sender,
+ String leaderPath, boolean removeShardOnFailure) {
+ String shardName = shardInfo.getShardName();
+ shardReplicaOperationsInProgress.remove(shardName);
+
+ LOG.debug ("{}: Received {} for shard {} from leader {}", persistenceId(), replyMsg, shardName, leaderPath);
+
+ if (replyMsg.getStatus() == ServerChangeStatus.OK) {
+ LOG.debug ("{}: Leader shard successfully added the replica shard {}", persistenceId(), shardName);
+
+ // Make the local shard voting capable
+ shardInfo.setDatastoreContext(newShardDatastoreContext(shardName), getSelf());
+ shardInfo.setActiveMember(true);
+ persistShardList();
+
+ mBean.addLocalShard(shardInfo.getShardId().toString());
+ sender.tell(new akka.actor.Status.Success(null), getSelf());
+ } else if(replyMsg.getStatus() == ServerChangeStatus.ALREADY_EXISTS) {
+ sendLocalReplicaAlreadyExistsReply(shardName, sender);
+ } else {
+ LOG.warn ("{}: Leader failed to add shard replica {} with status {}",
+ persistenceId(), shardName, replyMsg.getStatus());
+
+ Exception failure;
+ switch (replyMsg.getStatus()) {
+ case TIMEOUT:
+ failure = new TimeoutException(String.format(
+ "The shard leader %s timed out trying to replicate the initial data to the new shard %s." +
+ "Possible causes - there was a problem replicating the data or shard leadership changed while replicating the shard data",
+ leaderPath, shardName));
+ break;
+ case NO_LEADER:
+ failure = createNoShardLeaderException(shardInfo.getShardId());
+ break;
+ default :
+ failure = new RuntimeException(String.format(
+ "AddServer request to leader %s for shard %s failed with status %s",
+ leaderPath, shardName, replyMsg.getStatus()));
+ }
+
+ onAddServerFailure(shardName, null, failure, sender, removeShardOnFailure);
+ }
+ }
+
+ private void onRemoveShardReplica (RemoveShardReplica shardReplicaMsg) {
+ String shardName = shardReplicaMsg.getShardName();
+
+ // verify the local shard replica is available in the controller node
+ if (!localShards.containsKey(shardName)) {
+ String msg = String.format("Local shard %s does not", shardName);
+ LOG.debug ("{}: {}", persistenceId(), msg);
+ getSender().tell(new akka.actor.Status.Failure(new IllegalArgumentException(msg)), getSelf());
+ return;
+ }
+ // call RemoveShard for the shardName
+ getSender().tell(new akka.actor.Status.Success(true), getSelf());
+ return;
+ }
+
+ private void persistShardList() {
+ List<String> shardList = new ArrayList<>(localShards.keySet());
+ for (ShardInformation shardInfo : localShards.values()) {
+ if (!shardInfo.isActiveMember()) {
+ shardList.remove(shardInfo.getShardName());
+ }
+ }
+ LOG.debug ("{}: persisting the shard list {}", persistenceId(), shardList);
+ saveSnapshot(new ShardManagerSnapshot(shardList));
+ }
+
+ private void handleShardRecovery(SnapshotOffer offer) {
+ LOG.debug ("{}: in handleShardRecovery", persistenceId());
+ ShardManagerSnapshot snapshot = (ShardManagerSnapshot)offer.snapshot();
+ String currentMember = cluster.getCurrentMemberName();
+ Set<String> configuredShardList =
+ new HashSet<>(configuration.getMemberShardNames(currentMember));
+ for (String shard : snapshot.getShardList()) {
+ if (!configuredShardList.contains(shard)) {
+ // add the current member as a replica for the shard
+ LOG.debug ("{}: adding shard {}", persistenceId(), shard);
+ configuration.addMemberReplicaForShard(shard, currentMember);
+ } else {
+ configuredShardList.remove(shard);
+ }
+ }
+ for (String shard : configuredShardList) {
+ // remove the member as a replica for the shard
+ LOG.debug ("{}: removing shard {}", persistenceId(), shard);
+ configuration.removeMemberReplicaForShard(shard, currentMember);
+ }
+ }
+
+ private static class ForwardedAddServerPrimaryShardFound {
+ String shardName;
+ RemotePrimaryShardFound primaryFound;
+
+ ForwardedAddServerPrimaryShardFound(String shardName, RemotePrimaryShardFound primaryFound) {
+ this.shardName = shardName;
+ this.primaryFound = primaryFound;
+ }
+ }
+
+ private static class ForwardedAddServerReply {
+ ShardInformation shardInfo;
+ AddServerReply addServerReply;
+ String leaderPath;
+ boolean removeShardOnFailure;
+
+ ForwardedAddServerReply(ShardInformation shardInfo, AddServerReply addServerReply, String leaderPath,
+ boolean removeShardOnFailure) {
+ this.shardInfo = shardInfo;
+ this.addServerReply = addServerReply;
+ this.leaderPath = leaderPath;
+ this.removeShardOnFailure = removeShardOnFailure;
+ }
+ }
+
+ private static class ForwardedAddServerFailure {
+ String shardName;
+ String failureMessage;
+ Throwable failure;
+ boolean removeShardOnFailure;
+
+ ForwardedAddServerFailure(String shardName, String failureMessage, Throwable failure,
+ boolean removeShardOnFailure) {
+ this.shardName = shardName;
+ this.failureMessage = failureMessage;
+ this.failure = failure;
+ this.removeShardOnFailure = removeShardOnFailure;
+ }
}
@VisibleForTesting
private final String shardName;
private ActorRef actor;
private ActorPath actorPath;
- private final Map<String, String> peerAddresses;
+ private final Map<String, String> initialPeerAddresses;
+ private Optional<DataTree> localShardDataTree;
+ private boolean leaderAvailable = false;
// flag that determines if the actor is ready for business
private boolean actorInitialized = false;
private final Set<OnShardInitialized> onShardInitializedSet = Sets.newHashSet();
private String role ;
private String leaderId;
+ private short leaderVersion;
+
+ private DatastoreContext datastoreContext;
+ private Shard.AbstractBuilder<?, ?> builder;
+ private final ShardPeerAddressResolver addressResolver;
+ private boolean isActiveMember = true;
private ShardInformation(String shardName, ShardIdentifier shardId,
- Map<String, String> peerAddresses) {
+ Map<String, String> initialPeerAddresses, DatastoreContext datastoreContext,
+ Shard.AbstractBuilder<?, ?> builder, ShardPeerAddressResolver addressResolver) {
this.shardName = shardName;
this.shardId = shardId;
- this.peerAddresses = peerAddresses;
+ this.initialPeerAddresses = initialPeerAddresses;
+ this.datastoreContext = datastoreContext;
+ this.builder = builder;
+ this.addressResolver = addressResolver;
+ }
+
+ Props newProps(SchemaContext schemaContext) {
+ Preconditions.checkNotNull(builder);
+ Props props = builder.id(shardId).peerAddresses(initialPeerAddresses).datastoreContext(datastoreContext).
+ schemaContext(schemaContext).props();
+ builder = null;
+ return props;
}
String getShardName() {
return shardName;
}
+ @Nullable
ActorRef getActor(){
return actor;
}
return shardId;
}
- Map<String, String> getPeerAddresses() {
- return peerAddresses;
+ void setLocalDataTree(Optional<DataTree> localShardDataTree) {
+ this.localShardDataTree = localShardDataTree;
+ }
+
+ Optional<DataTree> getLocalShardDataTree() {
+ return localShardDataTree;
+ }
+
+ DatastoreContext getDatastoreContext() {
+ return datastoreContext;
+ }
+
+ void setDatastoreContext(DatastoreContext datastoreContext, ActorRef sender) {
+ this.datastoreContext = datastoreContext;
+ if (actor != null) {
+ LOG.debug ("Sending new DatastoreContext to {}", shardId);
+ actor.tell(this.datastoreContext, sender);
+ }
}
void updatePeerAddress(String peerId, String peerAddress, ActorRef sender){
- LOG.info("updatePeerAddress for peer {} with address {}", peerId,
- peerAddress);
- if(peerAddresses.containsKey(peerId)){
- peerAddresses.put(peerId, peerAddress);
-
- if(actor != null) {
- if(LOG.isDebugEnabled()) {
- LOG.debug("Sending PeerAddressResolved for peer {} with address {} to {}",
- peerId, peerAddress, actor.path());
- }
+ LOG.info("updatePeerAddress for peer {} with address {}", peerId, peerAddress);
- actor.tell(new PeerAddressResolved(peerId.toString(), peerAddress), sender);
+ if(actor != null) {
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Sending PeerAddressResolved for peer {} with address {} to {}",
+ peerId, peerAddress, actor.path());
}
- notifyOnShardInitializedCallbacks();
+ actor.tell(new PeerAddressResolved(peerId, peerAddress), sender);
+ }
+
+ notifyOnShardInitializedCallbacks();
+ }
+
+ void peerDown(String memberName, String peerId, ActorRef sender) {
+ if(actor != null) {
+ actor.tell(new PeerDown(memberName, peerId), sender);
+ }
+ }
+
+ void peerUp(String memberName, String peerId, ActorRef sender) {
+ if(actor != null) {
+ actor.tell(new PeerUp(memberName, peerId), sender);
}
}
}
boolean isShardReadyWithLeaderId() {
- return isShardReady() && (isLeader() || peerAddresses.containsKey(leaderId));
+ return leaderAvailable && isShardReady() && !RaftState.IsolatedLeader.name().equals(role) &&
+ (isLeader() || addressResolver.resolve(leaderId) != null);
}
boolean isShardInitialized() {
if(isLeader()) {
return Serialization.serializedActorPath(getActor());
} else {
- return peerAddresses.get(leaderId);
+ return addressResolver.resolve(leaderId);
}
}
return false;
}
- void setLeaderId(String leaderId) {
+ boolean setLeaderId(String leaderId) {
+ boolean changed = !Objects.equal(this.leaderId, leaderId);
this.leaderId = leaderId;
-
+ if(leaderId != null) {
+ this.leaderAvailable = true;
+ }
notifyOnShardInitializedCallbacks();
+
+ return changed;
}
- }
- private static class ShardManagerCreator implements Creator<ShardManager> {
- private static final long serialVersionUID = 1L;
+ String getLeaderId() {
+ return leaderId;
+ }
- final ClusterWrapper cluster;
- final Configuration configuration;
- final DatastoreContext datastoreContext;
- private final CountDownLatch waitTillReadyCountdownLatch;
+ void setLeaderAvailable(boolean leaderAvailable) {
+ this.leaderAvailable = leaderAvailable;
+ }
- ShardManagerCreator(ClusterWrapper cluster,
- Configuration configuration, DatastoreContext datastoreContext, CountDownLatch waitTillReadyCountdownLatch) {
- this.cluster = cluster;
- this.configuration = configuration;
- this.datastoreContext = datastoreContext;
- this.waitTillReadyCountdownLatch = waitTillReadyCountdownLatch;
+ short getLeaderVersion() {
+ return leaderVersion;
+ }
+
+ void setLeaderVersion(short leaderVersion) {
+ this.leaderVersion = leaderVersion;
}
- @Override
- public ShardManager create() throws Exception {
- return new ShardManager(cluster, configuration, datastoreContext, waitTillReadyCountdownLatch);
+ boolean isActiveMember() {
+ return isActiveMember;
+ }
+
+ void setActiveMember(boolean isActiveMember) {
+ this.isActiveMember = isActiveMember;
}
}
}
}
+ /**
+ * We no longer persist SchemaContextModules but keep this class around for now for backwards
+ * compatibility so we don't get de-serialization failures on upgrade from Helium.
+ */
+ @Deprecated
static class SchemaContextModules implements Serializable {
private static final long serialVersionUID = -8884620101025936590L;
return modules;
}
}
+
+ public static Builder builder() {
+ return new Builder();
+ }
+
+ public static class Builder {
+ private ClusterWrapper cluster;
+ private Configuration configuration;
+ private DatastoreContextFactory datastoreContextFactory;
+ private CountDownLatch waitTillReadyCountdownLatch;
+ private PrimaryShardInfoFutureCache primaryShardInfoCache;
+ private DatastoreSnapshot restoreFromSnapshot;
+ private volatile boolean sealed;
+
+ protected void checkSealed() {
+ Preconditions.checkState(!sealed, "Builder is already sealed - further modifications are not allowed");
+ }
+
+ public Builder cluster(ClusterWrapper cluster) {
+ checkSealed();
+ this.cluster = cluster;
+ return this;
+ }
+
+ public Builder configuration(Configuration configuration) {
+ checkSealed();
+ this.configuration = configuration;
+ return this;
+ }
+
+ public Builder datastoreContextFactory(DatastoreContextFactory datastoreContextFactory) {
+ checkSealed();
+ this.datastoreContextFactory = datastoreContextFactory;
+ return this;
+ }
+
+ public Builder waitTillReadyCountdownLatch(CountDownLatch waitTillReadyCountdownLatch) {
+ checkSealed();
+ this.waitTillReadyCountdownLatch = waitTillReadyCountdownLatch;
+ return this;
+ }
+
+ public Builder primaryShardInfoCache(PrimaryShardInfoFutureCache primaryShardInfoCache) {
+ checkSealed();
+ this.primaryShardInfoCache = primaryShardInfoCache;
+ return this;
+ }
+
+ public Builder restoreFromSnapshot(DatastoreSnapshot restoreFromSnapshot) {
+ checkSealed();
+ this.restoreFromSnapshot = restoreFromSnapshot;
+ return this;
+ }
+
+ protected void verify() {
+ sealed = true;
+ Preconditions.checkNotNull(cluster, "cluster should not be null");
+ Preconditions.checkNotNull(configuration, "configuration should not be null");
+ Preconditions.checkNotNull(datastoreContextFactory, "datastoreContextFactory should not be null");
+ Preconditions.checkNotNull(waitTillReadyCountdownLatch, "waitTillReadyCountdownLatch should not be null");
+ Preconditions.checkNotNull(primaryShardInfoCache, "primaryShardInfoCache should not be null");
+ }
+
+ public Props props() {
+ verify();
+ return Props.create(ShardManager.class, this);
+ }
+ }
}
Code Review / controller.git / blobdiff