2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.controller.cluster.datastore;
11 import akka.actor.ActorPath;
12 import akka.actor.ActorRef;
13 import akka.actor.Address;
14 import akka.actor.Cancellable;
15 import akka.actor.OneForOneStrategy;
16 import akka.actor.Props;
17 import akka.actor.SupervisorStrategy;
18 import akka.cluster.ClusterEvent;
19 import akka.japi.Creator;
20 import akka.japi.Function;
21 import akka.japi.Procedure;
22 import akka.persistence.RecoveryCompleted;
23 import akka.persistence.RecoveryFailure;
24 import akka.serialization.Serialization;
25 import com.google.common.annotations.VisibleForTesting;
26 import com.google.common.base.Objects;
27 import com.google.common.base.Preconditions;
28 import com.google.common.base.Strings;
29 import com.google.common.base.Supplier;
30 import com.google.common.collect.ImmutableSet;
31 import com.google.common.collect.Sets;
32 import java.io.Serializable;
33 import java.util.ArrayList;
34 import java.util.Collection;
35 import java.util.Collections;
36 import java.util.HashMap;
37 import java.util.HashSet;
38 import java.util.Iterator;
39 import java.util.List;
42 import java.util.concurrent.CountDownLatch;
43 import org.opendaylight.controller.cluster.DataPersistenceProvider;
44 import org.opendaylight.controller.cluster.common.actor.AbstractUntypedPersistentActorWithMetering;
45 import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
46 import org.opendaylight.controller.cluster.datastore.exceptions.NotInitializedException;
47 import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
48 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
49 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
50 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shardmanager.ShardManagerInfo;
51 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shardmanager.ShardManagerInfoMBean;
52 import org.opendaylight.controller.cluster.datastore.messages.ActorInitialized;
53 import org.opendaylight.controller.cluster.datastore.messages.FindLocalShard;
54 import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
55 import org.opendaylight.controller.cluster.datastore.messages.LocalShardFound;
56 import org.opendaylight.controller.cluster.datastore.messages.LocalShardNotFound;
57 import org.opendaylight.controller.cluster.datastore.messages.PeerAddressResolved;
58 import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
59 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
60 import org.opendaylight.controller.cluster.datastore.utils.Dispatchers;
61 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
62 import org.opendaylight.controller.cluster.notifications.RegisterRoleChangeListener;
63 import org.opendaylight.controller.cluster.notifications.RoleChangeNotification;
64 import org.opendaylight.controller.cluster.raft.RaftState;
65 import org.opendaylight.controller.cluster.raft.base.messages.FollowerInitialSyncUpStatus;
66 import org.opendaylight.yangtools.yang.model.api.ModuleIdentifier;
67 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
68 import org.slf4j.Logger;
69 import org.slf4j.LoggerFactory;
70 import scala.concurrent.duration.Duration;
73 * The ShardManager has the following jobs,
75 * <li> Create all the local shard replicas that belong on this cluster member
76 * <li> Find the address of the local shard
77 * <li> Find the primary replica for any given shard
78 * <li> Monitor the cluster members and store their addresses
81 public class ShardManager extends AbstractUntypedPersistentActorWithMetering {
83 private static final Logger LOG = LoggerFactory.getLogger(ShardManager.class);
85 // Stores a mapping between a member name and the address of the member
86 // Member names look like "member-1", "member-2" etc and are as specified
88 private final Map<String, Address> memberNameToAddress = new HashMap<>();
90 // Stores a mapping between a shard name and it's corresponding information
91 // Shard names look like inventory, topology etc and are as specified in
93 private final Map<String, ShardInformation> localShards = new HashMap<>();
95 // The type of a ShardManager reflects the type of the datastore itself
96 // A data store could be of type config/operational
97 private final String type;
99 private final String shardManagerIdentifierString;
101 private final ClusterWrapper cluster;
103 private final Configuration configuration;
105 private final String shardDispatcherPath;
107 private ShardManagerInfo mBean;
109 private DatastoreContext datastoreContext;
111 private Collection<String> knownModules = Collections.emptySet();
113 private final DataPersistenceProvider dataPersistenceProvider;
115 private final CountDownLatch waitTillReadyCountdownLatch;
119 protected ShardManager(ClusterWrapper cluster, Configuration configuration,
120 DatastoreContext datastoreContext, CountDownLatch waitTillReadyCountdownLatch) {
122 this.cluster = Preconditions.checkNotNull(cluster, "cluster should not be null");
123 this.configuration = Preconditions.checkNotNull(configuration, "configuration should not be null");
124 this.datastoreContext = datastoreContext;
125 this.dataPersistenceProvider = createDataPersistenceProvider(datastoreContext.isPersistent());
126 this.type = datastoreContext.getDataStoreType();
127 this.shardManagerIdentifierString = ShardManagerIdentifier.builder().type(type).build().toString();
128 this.shardDispatcherPath =
129 new Dispatchers(context().system().dispatchers()).getDispatcherPath(Dispatchers.DispatcherType.Shard);
130 this.waitTillReadyCountdownLatch = waitTillReadyCountdownLatch;
132 // Subscribe this actor to cluster member events
133 cluster.subscribeToMemberEvents(getSelf());
138 protected DataPersistenceProvider createDataPersistenceProvider(boolean persistent) {
139 return (persistent) ? new PersistentDataProvider() : new NonPersistentDataProvider();
142 public static Props props(
143 final ClusterWrapper cluster,
144 final Configuration configuration,
145 final DatastoreContext datastoreContext,
146 final CountDownLatch waitTillReadyCountdownLatch) {
148 Preconditions.checkNotNull(cluster, "cluster should not be null");
149 Preconditions.checkNotNull(configuration, "configuration should not be null");
150 Preconditions.checkNotNull(waitTillReadyCountdownLatch, "waitTillReadyCountdownLatch should not be null");
152 return Props.create(new ShardManagerCreator(cluster, configuration, datastoreContext, waitTillReadyCountdownLatch));
156 public void postStop() {
157 LOG.info("Stopping ShardManager");
159 mBean.unregisterMBean();
163 public void handleCommand(Object message) throws Exception {
164 if (message instanceof FindPrimary) {
165 findPrimary((FindPrimary)message);
166 } else if(message instanceof FindLocalShard){
167 findLocalShard((FindLocalShard) message);
168 } else if (message instanceof UpdateSchemaContext) {
169 updateSchemaContext(message);
170 } else if(message instanceof ActorInitialized) {
171 onActorInitialized(message);
172 } else if (message instanceof ClusterEvent.MemberUp){
173 memberUp((ClusterEvent.MemberUp) message);
174 } else if(message instanceof ClusterEvent.MemberRemoved) {
175 memberRemoved((ClusterEvent.MemberRemoved) message);
176 } else if(message instanceof ClusterEvent.UnreachableMember) {
177 ignoreMessage(message);
178 } else if(message instanceof DatastoreContext) {
179 onDatastoreContext((DatastoreContext)message);
180 } else if(message instanceof RoleChangeNotification) {
181 onRoleChangeNotification((RoleChangeNotification) message);
182 } else if(message instanceof FollowerInitialSyncUpStatus){
183 onFollowerInitialSyncStatus((FollowerInitialSyncUpStatus) message);
184 } else if(message instanceof ShardNotInitializedTimeout) {
185 onShardNotInitializedTimeout((ShardNotInitializedTimeout)message);
186 } else if(message instanceof LeaderStateChanged) {
187 onLeaderStateChanged((LeaderStateChanged)message);
189 unknownMessage(message);
194 private void onLeaderStateChanged(LeaderStateChanged leaderStateChanged) {
195 LOG.info("{}: Received LeaderStateChanged message: {}", persistenceId(), leaderStateChanged);
197 ShardInformation shardInformation = findShardInformation(leaderStateChanged.getMemberId());
198 if(shardInformation != null) {
199 shardInformation.setLeaderId(leaderStateChanged.getLeaderId());
201 LOG.debug("No shard found with member Id {}", leaderStateChanged.getMemberId());
205 private void onShardNotInitializedTimeout(ShardNotInitializedTimeout message) {
206 ShardInformation shardInfo = message.getShardInfo();
208 LOG.debug("{}: Received ShardNotInitializedTimeout message for shard {}", persistenceId(),
209 shardInfo.getShardName());
211 shardInfo.removeOnShardInitialized(message.getOnShardInitialized());
213 if(!shardInfo.isShardInitialized()) {
214 LOG.debug("{}: Returning NotInitializedException for shard {}", persistenceId(), shardInfo.getShardName());
215 message.getSender().tell(createNotInitializedException(shardInfo.shardId), getSelf());
217 LOG.debug("{}: Returning NoShardLeaderException for shard {}", persistenceId(), shardInfo.getShardName());
218 message.getSender().tell(createNoShardLeaderException(shardInfo.shardId), getSelf());
222 private void onFollowerInitialSyncStatus(FollowerInitialSyncUpStatus status) {
223 LOG.info("{} Received follower initial sync status for {} status sync done {}", persistenceId(),
224 status.getName(), status.isInitialSyncDone());
226 ShardInformation shardInformation = findShardInformation(status.getName());
228 if(shardInformation != null) {
229 shardInformation.setFollowerSyncStatus(status.isInitialSyncDone());
231 mBean.setSyncStatus(isInSync());
236 private void onRoleChangeNotification(RoleChangeNotification roleChanged) {
237 LOG.info("{}: Received role changed for {} from {} to {}", persistenceId(), roleChanged.getMemberId(),
238 roleChanged.getOldRole(), roleChanged.getNewRole());
240 ShardInformation shardInformation = findShardInformation(roleChanged.getMemberId());
241 if(shardInformation != null) {
242 shardInformation.setRole(roleChanged.getNewRole());
245 LOG.info("{}: All Shards are ready - data store {} is ready, available count is {}",
246 persistenceId(), type, waitTillReadyCountdownLatch.getCount());
248 waitTillReadyCountdownLatch.countDown();
251 mBean.setSyncStatus(isInSync());
256 private ShardInformation findShardInformation(String memberId) {
257 for(ShardInformation info : localShards.values()){
258 if(info.getShardId().toString().equals(memberId)){
266 private boolean isReady() {
267 boolean isReady = true;
268 for (ShardInformation info : localShards.values()) {
269 if(!info.isShardReady()){
277 private boolean isInSync(){
278 for (ShardInformation info : localShards.values()) {
279 if(!info.isInSync()){
286 private void onActorInitialized(Object message) {
287 final ActorRef sender = getSender();
289 if (sender == null) {
290 return; //why is a non-actor sending this message? Just ignore.
293 String actorName = sender.path().name();
294 //find shard name from actor name; actor name is stringified shardId
295 ShardIdentifier shardId = ShardIdentifier.builder().fromShardIdString(actorName).build();
297 if (shardId.getShardName() == null) {
301 markShardAsInitialized(shardId.getShardName());
304 private void markShardAsInitialized(String shardName) {
305 LOG.debug("{}: Initializing shard [{}]", persistenceId(), shardName);
307 ShardInformation shardInformation = localShards.get(shardName);
308 if (shardInformation != null) {
309 shardInformation.setActorInitialized();
311 shardInformation.getActor().tell(new RegisterRoleChangeListener(), self());
316 protected void handleRecover(Object message) throws Exception {
317 if(dataPersistenceProvider.isRecoveryApplicable()) {
318 if (message instanceof SchemaContextModules) {
319 SchemaContextModules msg = (SchemaContextModules) message;
320 knownModules = ImmutableSet.copyOf(msg.getModules());
321 } else if (message instanceof RecoveryFailure) {
322 RecoveryFailure failure = (RecoveryFailure) message;
323 LOG.error("Recovery failed", failure.cause());
324 } else if (message instanceof RecoveryCompleted) {
325 LOG.info("Recovery complete : {}", persistenceId());
327 // Delete all the messages from the akka journal except the last one
328 deleteMessages(lastSequenceNr() - 1);
331 if (message instanceof RecoveryCompleted) {
332 LOG.info("Recovery complete : {}", persistenceId());
334 // Delete all the messages from the akka journal
335 deleteMessages(lastSequenceNr());
340 private void findLocalShard(FindLocalShard message) {
341 final ShardInformation shardInformation = localShards.get(message.getShardName());
343 if(shardInformation == null){
344 getSender().tell(new LocalShardNotFound(message.getShardName()), getSelf());
348 sendResponse(shardInformation, message.isWaitUntilInitialized(), false, new Supplier<Object>() {
350 public Object get() {
351 return new LocalShardFound(shardInformation.getActor());
356 private void sendResponse(ShardInformation shardInformation, boolean doWait,
357 boolean wantShardReady, final Supplier<Object> messageSupplier) {
358 if (!shardInformation.isShardInitialized() || (wantShardReady && !shardInformation.isShardReadyWithLeaderId())) {
360 final ActorRef sender = getSender();
361 final ActorRef self = self();
363 Runnable replyRunnable = new Runnable() {
366 sender.tell(messageSupplier.get(), self);
370 OnShardInitialized onShardInitialized = wantShardReady ? new OnShardReady(replyRunnable) :
371 new OnShardInitialized(replyRunnable);
373 shardInformation.addOnShardInitialized(onShardInitialized);
375 LOG.debug("{}: Scheduling timer to wait for shard {}", persistenceId(), shardInformation.getShardName());
377 Cancellable timeoutSchedule = getContext().system().scheduler().scheduleOnce(
378 datastoreContext.getShardInitializationTimeout().duration(), getSelf(),
379 new ShardNotInitializedTimeout(shardInformation, onShardInitialized, sender),
380 getContext().dispatcher(), getSelf());
382 onShardInitialized.setTimeoutSchedule(timeoutSchedule);
384 } else if (!shardInformation.isShardInitialized()) {
385 LOG.debug("{}: Returning NotInitializedException for shard {}", persistenceId(),
386 shardInformation.getShardName());
387 getSender().tell(createNotInitializedException(shardInformation.shardId), getSelf());
389 LOG.debug("{}: Returning NoShardLeaderException for shard {}", persistenceId(),
390 shardInformation.getShardName());
391 getSender().tell(createNoShardLeaderException(shardInformation.shardId), getSelf());
397 getSender().tell(messageSupplier.get(), getSelf());
400 private NoShardLeaderException createNoShardLeaderException(ShardIdentifier shardId) {
401 return new NoShardLeaderException(String.format(
402 "Could not find a leader for shard %s. This typically happens when the system is coming up or " +
403 "recovering and a leader is being elected. Try again later.", shardId));
406 private NotInitializedException createNotInitializedException(ShardIdentifier shardId) {
407 return new NotInitializedException(String.format(
408 "Found primary shard %s but it's not initialized yet. Please try again later", shardId));
411 private void memberRemoved(ClusterEvent.MemberRemoved message) {
412 String memberName = message.member().roles().head();
414 LOG.debug("{}: Received MemberRemoved: memberName: {}, address: {}", persistenceId(), memberName,
415 message.member().address());
417 memberNameToAddress.remove(message.member().roles().head());
420 private void memberUp(ClusterEvent.MemberUp message) {
421 String memberName = message.member().roles().head();
423 LOG.debug("{}: Received MemberUp: memberName: {}, address: {}", persistenceId(), memberName,
424 message.member().address());
426 memberNameToAddress.put(memberName, message.member().address());
428 for(ShardInformation info : localShards.values()){
429 String shardName = info.getShardName();
430 info.updatePeerAddress(getShardIdentifier(memberName, shardName).toString(),
431 getShardActorPath(shardName, memberName), getSelf());
435 private void onDatastoreContext(DatastoreContext context) {
436 datastoreContext = context;
437 for (ShardInformation info : localShards.values()) {
438 if (info.getActor() != null) {
439 info.getActor().tell(datastoreContext, getSelf());
445 * Notifies all the local shards of a change in the schema context
449 private void updateSchemaContext(final Object message) {
450 final SchemaContext schemaContext = ((UpdateSchemaContext) message).getSchemaContext();
452 Set<ModuleIdentifier> allModuleIdentifiers = schemaContext.getAllModuleIdentifiers();
453 Set<String> newModules = new HashSet<>(128);
455 for(ModuleIdentifier moduleIdentifier : allModuleIdentifiers){
456 String s = moduleIdentifier.getNamespace().toString();
460 if(newModules.containsAll(knownModules)) {
462 LOG.debug("New SchemaContext has a super set of current knownModules - persisting info");
464 knownModules = ImmutableSet.copyOf(newModules);
466 dataPersistenceProvider.persist(new SchemaContextModules(newModules), new Procedure<SchemaContextModules>() {
469 public void apply(SchemaContextModules param) throws Exception {
470 LOG.debug("Sending new SchemaContext to Shards");
471 for (ShardInformation info : localShards.values()) {
472 if (info.getActor() == null) {
473 info.setActor(newShardActor(schemaContext, info));
475 info.getActor().tell(message, getSelf());
482 LOG.debug("Rejecting schema context update - not a super set of previously known modules:\nUPDATE: {}\nKNOWN: {}",
483 newModules, knownModules);
489 protected ClusterWrapper getCluster() {
494 protected ActorRef newShardActor(final SchemaContext schemaContext, ShardInformation info) {
495 return getContext().actorOf(Shard.props(info.getShardId(),
496 info.getPeerAddresses(), datastoreContext, schemaContext)
497 .withDispatcher(shardDispatcherPath), info.getShardId().toString());
500 private void findPrimary(FindPrimary message) {
501 LOG.debug("{}: In findPrimary: {}", persistenceId(), message);
503 final String shardName = message.getShardName();
505 // First see if the there is a local replica for the shard
506 final ShardInformation info = localShards.get(shardName);
508 sendResponse(info, message.isWaitUntilReady(), true, new Supplier<Object>() {
510 public Object get() {
511 Object found = new PrimaryFound(info.getSerializedLeaderActor());
513 if(LOG.isDebugEnabled()) {
514 LOG.debug("{}: Found primary for {}: {}", persistenceId(), shardName, found);
524 for(Map.Entry<String, Address> entry: memberNameToAddress.entrySet()) {
525 if(!cluster.getCurrentMemberName().equals(entry.getKey())) {
526 String path = getShardManagerActorPathBuilder(entry.getValue()).toString();
528 LOG.debug("{}: findPrimary for {} forwarding to remote ShardManager {}", persistenceId(),
531 getContext().actorSelection(path).forward(message, getContext());
536 LOG.debug("{}: No shard found for {}", persistenceId(), shardName);
538 getSender().tell(new PrimaryNotFoundException(
539 String.format("No primary shard found for %s.", shardName)), getSelf());
542 private StringBuilder getShardManagerActorPathBuilder(Address address) {
543 StringBuilder builder = new StringBuilder();
544 builder.append(address.toString()).append("/user/").append(shardManagerIdentifierString);
548 private String getShardActorPath(String shardName, String memberName) {
549 Address address = memberNameToAddress.get(memberName);
550 if(address != null) {
551 StringBuilder builder = getShardManagerActorPathBuilder(address);
553 .append(getShardIdentifier(memberName, shardName));
554 return builder.toString();
560 * Construct the name of the shard actor given the name of the member on
561 * which the shard resides and the name of the shard
567 private ShardIdentifier getShardIdentifier(String memberName, String shardName){
568 return ShardIdentifier.builder().memberName(memberName).shardName(shardName).type(type).build();
572 * Create shards that are local to the member on which the ShardManager
576 private void createLocalShards() {
577 String memberName = this.cluster.getCurrentMemberName();
578 List<String> memberShardNames =
579 this.configuration.getMemberShardNames(memberName);
581 List<String> localShardActorNames = new ArrayList<>();
582 for(String shardName : memberShardNames){
583 ShardIdentifier shardId = getShardIdentifier(memberName, shardName);
584 Map<String, String> peerAddresses = getPeerAddresses(shardName);
585 localShardActorNames.add(shardId.toString());
586 localShards.put(shardName, new ShardInformation(shardName, shardId, peerAddresses));
589 mBean = ShardManagerInfo.createShardManagerMBean("shard-manager-" + this.type,
590 datastoreContext.getDataStoreMXBeanType(), localShardActorNames);
594 * Given the name of the shard find the addresses of all it's peers
599 private Map<String, String> getPeerAddresses(String shardName){
601 Map<String, String> peerAddresses = new HashMap<>();
603 List<String> members = this.configuration.getMembersFromShardName(shardName);
605 String currentMemberName = this.cluster.getCurrentMemberName();
607 for(String memberName : members){
608 if(!currentMemberName.equals(memberName)){
609 ShardIdentifier shardId = getShardIdentifier(memberName, shardName);
610 String path = getShardActorPath(shardName, currentMemberName);
611 peerAddresses.put(shardId.toString(), path);
614 return peerAddresses;
618 public SupervisorStrategy supervisorStrategy() {
620 return new OneForOneStrategy(10, Duration.create("1 minute"),
621 new Function<Throwable, SupervisorStrategy.Directive>() {
623 public SupervisorStrategy.Directive apply(Throwable t) {
624 LOG.warn("Supervisor Strategy caught unexpected exception - resuming", t);
625 return SupervisorStrategy.resume();
633 public String persistenceId() {
634 return "shard-manager-" + type;
638 Collection<String> getKnownModules() {
643 DataPersistenceProvider getDataPersistenceProvider() {
644 return dataPersistenceProvider;
648 ShardManagerInfoMBean getMBean(){
653 protected static class ShardInformation {
654 private final ShardIdentifier shardId;
655 private final String shardName;
656 private ActorRef actor;
657 private ActorPath actorPath;
658 private final Map<String, String> peerAddresses;
660 // flag that determines if the actor is ready for business
661 private boolean actorInitialized = false;
663 private boolean followerSyncStatus = false;
665 private final Set<OnShardInitialized> onShardInitializedSet = Sets.newHashSet();
666 private String role ;
667 private String leaderId;
669 private ShardInformation(String shardName, ShardIdentifier shardId,
670 Map<String, String> peerAddresses) {
671 this.shardName = shardName;
672 this.shardId = shardId;
673 this.peerAddresses = peerAddresses;
676 String getShardName() {
684 ActorPath getActorPath() {
688 void setActor(ActorRef actor) {
690 this.actorPath = actor.path();
693 ShardIdentifier getShardId() {
697 Map<String, String> getPeerAddresses() {
698 return peerAddresses;
701 void updatePeerAddress(String peerId, String peerAddress, ActorRef sender){
702 LOG.info("updatePeerAddress for peer {} with address {}", peerId,
704 if(peerAddresses.containsKey(peerId)){
705 peerAddresses.put(peerId, peerAddress);
708 if(LOG.isDebugEnabled()) {
709 LOG.debug("Sending PeerAddressResolved for peer {} with address {} to {}",
710 peerId, peerAddress, actor.path());
713 actor.tell(new PeerAddressResolved(peerId.toString(), peerAddress), sender);
716 notifyOnShardInitializedCallbacks();
720 boolean isShardReady() {
721 return !RaftState.Candidate.name().equals(role) && !Strings.isNullOrEmpty(role);
724 boolean isShardReadyWithLeaderId() {
725 return isShardReady() && (isLeader() || peerAddresses.containsKey(leaderId));
728 boolean isShardInitialized() {
729 return getActor() != null && actorInitialized;
733 return Objects.equal(leaderId, shardId.toString());
736 String getSerializedLeaderActor() {
738 return Serialization.serializedActorPath(getActor());
740 return peerAddresses.get(leaderId);
744 void setActorInitialized() {
745 LOG.debug("Shard {} is initialized", shardId);
747 this.actorInitialized = true;
749 notifyOnShardInitializedCallbacks();
752 private void notifyOnShardInitializedCallbacks() {
753 if(onShardInitializedSet.isEmpty()) {
757 boolean ready = isShardReadyWithLeaderId();
759 if(LOG.isDebugEnabled()) {
760 LOG.debug("Shard {} is {} - notifying {} OnShardInitialized callbacks", shardId,
761 ready ? "ready" : "initialized", onShardInitializedSet.size());
764 Iterator<OnShardInitialized> iter = onShardInitializedSet.iterator();
765 while(iter.hasNext()) {
766 OnShardInitialized onShardInitialized = iter.next();
767 if(!(onShardInitialized instanceof OnShardReady) || ready) {
769 onShardInitialized.getTimeoutSchedule().cancel();
770 onShardInitialized.getReplyRunnable().run();
775 void addOnShardInitialized(OnShardInitialized onShardInitialized) {
776 onShardInitializedSet.add(onShardInitialized);
779 void removeOnShardInitialized(OnShardInitialized onShardInitialized) {
780 onShardInitializedSet.remove(onShardInitialized);
783 void setRole(String newRole) {
786 notifyOnShardInitializedCallbacks();
789 void setFollowerSyncStatus(boolean syncStatus){
790 this.followerSyncStatus = syncStatus;
794 if(RaftState.Follower.name().equals(this.role)){
795 return followerSyncStatus;
796 } else if(RaftState.Leader.name().equals(this.role)){
803 void setLeaderId(String leaderId) {
804 this.leaderId = leaderId;
806 notifyOnShardInitializedCallbacks();
810 private static class ShardManagerCreator implements Creator<ShardManager> {
811 private static final long serialVersionUID = 1L;
813 final ClusterWrapper cluster;
814 final Configuration configuration;
815 final DatastoreContext datastoreContext;
816 private final CountDownLatch waitTillReadyCountdownLatch;
818 ShardManagerCreator(ClusterWrapper cluster,
819 Configuration configuration, DatastoreContext datastoreContext, CountDownLatch waitTillReadyCountdownLatch) {
820 this.cluster = cluster;
821 this.configuration = configuration;
822 this.datastoreContext = datastoreContext;
823 this.waitTillReadyCountdownLatch = waitTillReadyCountdownLatch;
827 public ShardManager create() throws Exception {
828 return new ShardManager(cluster, configuration, datastoreContext, waitTillReadyCountdownLatch);
832 private static class OnShardInitialized {
833 private final Runnable replyRunnable;
834 private Cancellable timeoutSchedule;
836 OnShardInitialized(Runnable replyRunnable) {
837 this.replyRunnable = replyRunnable;
840 Runnable getReplyRunnable() {
841 return replyRunnable;
844 Cancellable getTimeoutSchedule() {
845 return timeoutSchedule;
848 void setTimeoutSchedule(Cancellable timeoutSchedule) {
849 this.timeoutSchedule = timeoutSchedule;
853 private static class OnShardReady extends OnShardInitialized {
854 OnShardReady(Runnable replyRunnable) {
855 super(replyRunnable);
859 private static class ShardNotInitializedTimeout {
860 private final ActorRef sender;
861 private final ShardInformation shardInfo;
862 private final OnShardInitialized onShardInitialized;
864 ShardNotInitializedTimeout(ShardInformation shardInfo, OnShardInitialized onShardInitialized, ActorRef sender) {
865 this.sender = sender;
866 this.shardInfo = shardInfo;
867 this.onShardInitialized = onShardInitialized;
870 ActorRef getSender() {
874 ShardInformation getShardInfo() {
878 OnShardInitialized getOnShardInitialized() {
879 return onShardInitialized;
883 static class SchemaContextModules implements Serializable {
884 private static final long serialVersionUID = -8884620101025936590L;
886 private final Set<String> modules;
888 SchemaContextModules(Set<String> modules){
889 this.modules = modules;
892 public Set<String> getModules() {