X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FShard.java;h=10dbbc84d873ee54b5421643c00b046043e58114;hb=9e59cc0d824e6752a7a3f3ba092abaaf3c1d4193;hp=f61eec87083bed323bf8423a4f5a84000a02e0d6;hpb=f1c47fb514878ef2149e5f22d6098ff8c79dec1d;p=controller.git diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java index f61eec8708..ddb5989f09 100644 --- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java +++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java @@ -10,38 +10,69 @@ package org.opendaylight.controller.cluster.datastore; import akka.actor.ActorRef; import akka.actor.ActorSelection; +import akka.actor.PoisonPill; import akka.actor.Props; import akka.event.Logging; import akka.event.LoggingAdapter; import akka.japi.Creator; -import akka.persistence.Persistent; -import akka.persistence.UntypedProcessor; +import akka.persistence.RecoveryFailure; +import akka.serialization.Serialization; +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Optional; +import com.google.common.base.Preconditions; +import com.google.common.collect.Lists; +import com.google.common.util.concurrent.CheckedFuture; +import com.google.common.util.concurrent.FutureCallback; +import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; -import com.google.common.util.concurrent.ListeningExecutorService; -import com.google.common.util.concurrent.MoreExecutors; +import com.google.protobuf.ByteString; +import com.google.protobuf.InvalidProtocolBufferException; +import org.opendaylight.controller.cluster.common.actor.CommonConfig; +import org.opendaylight.controller.cluster.common.actor.MeteringBehavior; +import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier; +import org.opendaylight.controller.cluster.datastore.identifiers.ShardTransactionIdentifier; +import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardMBeanFactory; +import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats; +import org.opendaylight.controller.cluster.datastore.messages.CloseTransactionChain; import org.opendaylight.controller.cluster.datastore.messages.CommitTransactionReply; import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction; -import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChain; -import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChainReply; +import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply; +import org.opendaylight.controller.cluster.datastore.messages.EnableNotification; import org.opendaylight.controller.cluster.datastore.messages.ForwardedCommitTransaction; -import org.opendaylight.controller.cluster.datastore.messages.NonPersistent; +import org.opendaylight.controller.cluster.datastore.messages.PeerAddressResolved; +import org.opendaylight.controller.cluster.datastore.messages.ReadData; +import org.opendaylight.controller.cluster.datastore.messages.ReadDataReply; import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener; import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply; import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext; import org.opendaylight.controller.cluster.datastore.modification.Modification; +import org.opendaylight.controller.cluster.datastore.modification.MutableCompositeModification; +import org.opendaylight.controller.cluster.datastore.node.NormalizedNodeToNodeCodec; +import org.opendaylight.controller.cluster.raft.RaftActor; +import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry; +import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply; +import org.opendaylight.controller.cluster.raft.protobuff.client.messages.CompositeModificationPayload; +import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload; import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener; +import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException; import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore; -import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction; +import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStoreFactory; +import org.opendaylight.controller.protobuff.messages.common.NormalizedNodeMessages; +import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction; import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort; import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain; -import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier; +import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionFactory; +import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction; +import org.opendaylight.yangtools.concepts.ListenerRegistration; +import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier; import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode; -import org.opendaylight.controller.protobuff.messages.transaction.ShardTransactionMessages.CreateTransactionReply; - +import org.opendaylight.yangtools.yang.model.api.SchemaContext; +import java.util.ArrayList; +import java.util.Collection; import java.util.HashMap; +import java.util.List; import java.util.Map; import java.util.concurrent.ExecutionException; -import java.util.concurrent.Executors; /** * A Shard represents a portion of the logical data tree
@@ -49,149 +80,612 @@ import java.util.concurrent.Executors; * Our Shard uses InMemoryDataStore as it's internal representation and delegates all requests it *

*/ -public class Shard extends UntypedProcessor { +public class Shard extends RaftActor { public static final String DEFAULT_NAME = "default"; - private final ListeningExecutorService storeExecutor = - MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2)); - + // The state of this Shard private final InMemoryDOMDataStore store; - private final Map + private final Map modificationToCohort = new HashMap<>(); - private final LoggingAdapter log = + private final LoggingAdapter LOG = Logging.getLogger(getContext().system(), this); // By default persistent will be true and can be turned off using the system - // property persistent + // property shard.persistent private final boolean persistent; - private Shard(String name) { + /// The name of this shard + private final ShardIdentifier name; + + private final ShardStats shardMBean; + + private final List dataChangeListeners = new ArrayList<>(); + + private final DatastoreContext datastoreContext; + + private SchemaContext schemaContext; + + private ActorRef createSnapshotTransaction; + + /** + * Coordinates persistence recovery on startup. + */ + private ShardRecoveryCoordinator recoveryCoordinator; + private List currentLogRecoveryBatch; + + private final Map transactionChains = new HashMap<>(); + + protected Shard(ShardIdentifier name, Map peerAddresses, + DatastoreContext datastoreContext, SchemaContext schemaContext) { + super(name.toString(), mapPeerAddresses(peerAddresses), + Optional.of(datastoreContext.getShardRaftConfig())); + + this.name = name; + this.datastoreContext = datastoreContext; + this.schemaContext = schemaContext; String setting = System.getProperty("shard.persistent"); + this.persistent = !"false".equals(setting); - log.info("Creating shard : {} persistent : {}", name , persistent); + LOG.info("Shard created : {} persistent : {}", name, persistent); + + store = InMemoryDOMDataStoreFactory.create(name.toString(), null, + datastoreContext.getDataStoreProperties()); - store = new InMemoryDOMDataStore(name, storeExecutor); + if(schemaContext != null) { + store.onGlobalContextUpdated(schemaContext); + } + + shardMBean = ShardMBeanFactory.getShardStatsMBean(name.toString(), + datastoreContext.getDataStoreMXBeanType()); + shardMBean.setDataStoreExecutor(store.getDomStoreExecutor()); + shardMBean.setNotificationManager(store.getDataChangeListenerNotificationManager()); + + if (isMetricsCaptureEnabled()) { + getContext().become(new MeteringBehavior(this)); + } } - public static Props props(final String name) { - return Props.create(new Creator() { + private static Map mapPeerAddresses( + Map peerAddresses) { + Map map = new HashMap<>(); - @Override - public Shard create() throws Exception { - return new Shard(name); - } + for (Map.Entry entry : peerAddresses + .entrySet()) { + map.put(entry.getKey().toString(), entry.getValue()); + } - }); + return map; } + public static Props props(final ShardIdentifier name, + final Map peerAddresses, + DatastoreContext datastoreContext, SchemaContext schemaContext) { + Preconditions.checkNotNull(name, "name should not be null"); + Preconditions.checkNotNull(peerAddresses, "peerAddresses should not be null"); + Preconditions.checkNotNull(datastoreContext, "dataStoreContext should not be null"); + Preconditions.checkNotNull(schemaContext, "schemaContext should not be null"); - @Override - public void onReceive(Object message) throws Exception { - log.debug("Received message {}", message); + return Props.create(new ShardCreator(name, peerAddresses, datastoreContext, schemaContext)); + } + + @Override public void onReceiveRecover(Object message) { + if(LOG.isDebugEnabled()) { + LOG.debug("onReceiveRecover: Received message {} from {}", + message.getClass().toString(), + getSender()); + } - if (message instanceof CreateTransactionChain) { - createTransactionChain(); + if (message instanceof RecoveryFailure){ + LOG.error(((RecoveryFailure) message).cause(), "Recovery failed because of this cause"); + } else { + super.onReceiveRecover(message); + } + } + + @Override public void onReceiveCommand(Object message) { + if(LOG.isDebugEnabled()) { + LOG.debug("onReceiveCommand: Received message {} from {}", + message.getClass().toString(), + getSender()); + } + + if(message.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)) { + // This must be for install snapshot. Don't want to open this up and trigger + // deSerialization + self() + .tell(new CaptureSnapshotReply(ReadDataReply.getNormalizedNodeByteString(message)), + self()); + + createSnapshotTransaction = null; + // Send a PoisonPill instead of sending close transaction because we do not really need + // a response + getSender().tell(PoisonPill.getInstance(), self()); + + } else if (message.getClass().equals(CloseTransactionChain.SERIALIZABLE_CLASS)){ + closeTransactionChain(CloseTransactionChain.fromSerializable(message)); } else if (message instanceof RegisterChangeListener) { registerChangeListener((RegisterChangeListener) message); } else if (message instanceof UpdateSchemaContext) { updateSchemaContext((UpdateSchemaContext) message); } else if (message instanceof ForwardedCommitTransaction) { handleForwardedCommit((ForwardedCommitTransaction) message); - } else if (message instanceof Persistent) { - commit((Modification) ((Persistent) message).payload()); - } else if (message instanceof CreateTransaction) { - createTransaction((CreateTransaction) message); - } else if(message instanceof NonPersistent){ - commit((Modification) ((NonPersistent) message).payload()); + } else if (message.getClass() + .equals(CreateTransaction.SERIALIZABLE_CLASS)) { + if (isLeader()) { + createTransaction(CreateTransaction.fromSerializable(message)); + } else if (getLeader() != null) { + getLeader().forward(message, getContext()); + } else { + getSender().tell(new akka.actor.Status.Failure(new IllegalStateException( + "Could not find leader so transaction cannot be created")), getSelf()); + } + } else if (message instanceof PeerAddressResolved) { + PeerAddressResolved resolved = (PeerAddressResolved) message; + setPeerAddress(resolved.getPeerId().toString(), + resolved.getPeerAddress()); + } else { + super.onReceiveCommand(message); + } + } + + private void closeTransactionChain(CloseTransactionChain closeTransactionChain) { + DOMStoreTransactionChain chain = + transactionChains.remove(closeTransactionChain.getTransactionChainId()); + + if(chain != null) { + chain.close(); + } + } + + private ActorRef createTypedTransactionActor( + int transactionType, + ShardTransactionIdentifier transactionId, + String transactionChainId ) { + + DOMStoreTransactionFactory factory = store; + + if(!transactionChainId.isEmpty()) { + factory = transactionChains.get(transactionChainId); + if(factory == null){ + DOMStoreTransactionChain transactionChain = store.createTransactionChain(); + transactionChains.put(transactionChainId, transactionChain); + factory = transactionChain; + } + } + + if(this.schemaContext == null){ + throw new NullPointerException("schemaContext should not be null"); + } + + if (transactionType + == TransactionProxy.TransactionType.READ_ONLY.ordinal()) { + + shardMBean.incrementReadOnlyTransactionCount(); + + return getContext().actorOf( + ShardTransaction.props(factory.newReadOnlyTransaction(), getSelf(), + schemaContext,datastoreContext, shardMBean), transactionId.toString()); + + } else if (transactionType + == TransactionProxy.TransactionType.READ_WRITE.ordinal()) { + + shardMBean.incrementReadWriteTransactionCount(); + + return getContext().actorOf( + ShardTransaction.props(factory.newReadWriteTransaction(), getSelf(), + schemaContext, datastoreContext, shardMBean), transactionId.toString()); + + + } else if (transactionType + == TransactionProxy.TransactionType.WRITE_ONLY.ordinal()) { + + shardMBean.incrementWriteOnlyTransactionCount(); + + return getContext().actorOf( + ShardTransaction.props(factory.newWriteOnlyTransaction(), getSelf(), + schemaContext, datastoreContext, shardMBean), transactionId.toString()); + } else { + throw new IllegalArgumentException( + "Shard="+name + ":CreateTransaction message has unidentified transaction type=" + + transactionType); } } private void createTransaction(CreateTransaction createTransaction) { - DOMStoreReadWriteTransaction transaction = - store.newReadWriteTransaction(); - ActorRef transactionActor = getContext().actorOf( - ShardTransaction.props(transaction, getSelf()), "shard-" + createTransaction.getTransactionId()); + createTransaction(createTransaction.getTransactionType(), + createTransaction.getTransactionId(), createTransaction.getTransactionChainId()); + } + + private ActorRef createTransaction(int transactionType, String remoteTransactionId, String transactionChainId) { + + ShardTransactionIdentifier transactionId = + ShardTransactionIdentifier.builder() + .remoteTransactionId(remoteTransactionId) + .build(); + if(LOG.isDebugEnabled()) { + LOG.debug("Creating transaction : {} ", transactionId); + } + ActorRef transactionActor = + createTypedTransactionActor(transactionType, transactionId, transactionChainId); + getSender() - .tell(CreateTransactionReply.newBuilder() - .setTransactionActorPath(transactionActor.path().toString()) - .setTransactionId(createTransaction.getTransactionId()) - .build(), + .tell(new CreateTransactionReply( + Serialization.serializedActorPath(transactionActor), + remoteTransactionId).toSerializable(), getSelf()); + + return transactionActor; + } + + private void syncCommitTransaction(DOMStoreWriteTransaction transaction) + throws ExecutionException, InterruptedException { + DOMStoreThreePhaseCommitCohort commitCohort = transaction.ready(); + commitCohort.preCommit().get(); + commitCohort.commit().get(); } - private void commit(Modification modification) { + + private void commit(final ActorRef sender, Object serialized) { + Modification modification = MutableCompositeModification + .fromSerializable(serialized, schemaContext); DOMStoreThreePhaseCommitCohort cohort = - modificationToCohort.remove(modification); + modificationToCohort.remove(serialized); if (cohort == null) { - log.error( - "Could not find cohort for modification : " + modification); + // If there's no cached cohort then we must be applying replicated state. + commitWithNewTransaction(serialized); + return; + } + + if(sender == null) { + LOG.error("Commit failed. Sender cannot be null"); return; } - final ListenableFuture future = cohort.commit(); - final ActorRef sender = getSender(); - final ActorRef self = getSelf(); - future.addListener(new Runnable() { + + ListenableFuture future = cohort.commit(); + + Futures.addCallback(future, new FutureCallback() { @Override - public void run() { - try { - future.get(); - sender.tell(new CommitTransactionReply(), self); - } catch (InterruptedException | ExecutionException e) { - // FIXME : Handle this properly - log.error(e, "An exception happened when committing"); - } + public void onSuccess(Void v) { + sender.tell(new CommitTransactionReply().toSerializable(), getSelf()); + shardMBean.incrementCommittedTransactionCount(); + shardMBean.setLastCommittedTransactionTime(System.currentTimeMillis()); + } + + @Override + public void onFailure(Throwable t) { + LOG.error(t, "An exception happened during commit"); + shardMBean.incrementFailedTransactionsCount(); + sender.tell(new akka.actor.Status.Failure(t), getSelf()); } - }, getContext().dispatcher()); + }); + + } + + private void commitWithNewTransaction(Object modification) { + DOMStoreWriteTransaction tx = store.newWriteOnlyTransaction(); + MutableCompositeModification.fromSerializable(modification, schemaContext).apply(tx); + try { + syncCommitTransaction(tx); + shardMBean.incrementCommittedTransactionCount(); + } catch (InterruptedException | ExecutionException e) { + shardMBean.incrementFailedTransactionsCount(); + LOG.error(e, "Failed to commit"); + } } private void handleForwardedCommit(ForwardedCommitTransaction message) { + Object serializedModification = + message.getModification().toSerializable(); + modificationToCohort - .put(message.getModification(), message.getCohort()); - if(persistent) { - getSelf().forward(Persistent.create(message.getModification()), - getContext()); + .put(serializedModification, message.getCohort()); + + if (persistent) { + this.persistData(getSender(), "identifier", + new CompositeModificationPayload(serializedModification)); } else { - getSelf().forward(NonPersistent.create(message.getModification()), - getContext()); + this.commit(getSender(), serializedModification); } } private void updateSchemaContext(UpdateSchemaContext message) { + this.schemaContext = message.getSchemaContext(); + updateSchemaContext(message.getSchemaContext()); store.onGlobalContextUpdated(message.getSchemaContext()); } + @VisibleForTesting void updateSchemaContext(SchemaContext schemaContext) { + store.onGlobalContextUpdated(schemaContext); + } + private void registerChangeListener( RegisterChangeListener registerChangeListener) { + if(LOG.isDebugEnabled()) { + LOG.debug("registerDataChangeListener for {}", registerChangeListener + .getPath()); + } + + ActorSelection dataChangeListenerPath = getContext() - .system().actorSelection(registerChangeListener.getDataChangeListenerPath()); + .system().actorSelection( + registerChangeListener.getDataChangeListenerPath()); + + + // Notify the listener if notifications should be enabled or not + // If this shard is the leader then it will enable notifications else + // it will not + dataChangeListenerPath + .tell(new EnableNotification(isLeader()), getSelf()); - AsyncDataChangeListener> - listener = new DataChangeListenerProxy(dataChangeListenerPath); + // Now store a reference to the data change listener so it can be notified + // at a later point if notifications should be enabled or disabled + dataChangeListeners.add(dataChangeListenerPath); - org.opendaylight.yangtools.concepts.ListenerRegistration>> - registration = - store.registerChangeListener(registerChangeListener.getPath(), + AsyncDataChangeListener> + listener = new DataChangeListenerProxy(schemaContext, dataChangeListenerPath); + + ListenerRegistration>> + registration = store.registerChangeListener(registerChangeListener.getPath(), listener, registerChangeListener.getScope()); ActorRef listenerRegistration = getContext().actorOf( DataChangeListenerRegistration.props(registration)); + + if(LOG.isDebugEnabled()) { + LOG.debug( + "registerDataChangeListener sending reply, listenerRegistrationPath = {} " + , listenerRegistration.path().toString()); + } + getSender() .tell(new RegisterChangeListenerReply(listenerRegistration.path()), getSelf()); } - private void createTransactionChain() { - DOMStoreTransactionChain chain = store.createTransactionChain(); - ActorRef transactionChain = - getContext().actorOf(ShardTransactionChain.props(chain)); - getSender() - .tell(new CreateTransactionChainReply(transactionChain.path()), - getSelf()); + private boolean isMetricsCaptureEnabled(){ + CommonConfig config = new CommonConfig(getContext().system().settings().config()); + return config.isMetricCaptureEnabled(); + } + + @Override + protected + void startLogRecoveryBatch(int maxBatchSize) { + currentLogRecoveryBatch = Lists.newArrayListWithCapacity(maxBatchSize); + + if(LOG.isDebugEnabled()) { + LOG.debug("{} : starting log recovery batch with max size {}", persistenceId(), maxBatchSize); + } + } + + @Override + protected void appendRecoveredLogEntry(Payload data) { + if (data instanceof CompositeModificationPayload) { + currentLogRecoveryBatch.add(((CompositeModificationPayload) data).getModification()); + } else { + LOG.error("Unknown state received {} during recovery", data); + } + } + + @Override + protected void applyRecoverySnapshot(ByteString snapshot) { + if(recoveryCoordinator == null) { + recoveryCoordinator = new ShardRecoveryCoordinator(persistenceId(), schemaContext); + } + + recoveryCoordinator.submit(snapshot, store.newWriteOnlyTransaction()); + + if(LOG.isDebugEnabled()) { + LOG.debug("{} : submitted recovery sbapshot", persistenceId()); + } + } + + @Override + protected void applyCurrentLogRecoveryBatch() { + if(recoveryCoordinator == null) { + recoveryCoordinator = new ShardRecoveryCoordinator(persistenceId(), schemaContext); + } + + recoveryCoordinator.submit(currentLogRecoveryBatch, store.newWriteOnlyTransaction()); + + if(LOG.isDebugEnabled()) { + LOG.debug("{} : submitted log recovery batch with size {}", persistenceId(), + currentLogRecoveryBatch.size()); + } + } + + @Override + protected void onRecoveryComplete() { + if(recoveryCoordinator != null) { + Collection txList = recoveryCoordinator.getTransactions(); + + if(LOG.isDebugEnabled()) { + LOG.debug("{} : recovery complete - committing {} Tx's", persistenceId(), txList.size()); + } + + for(DOMStoreWriteTransaction tx: txList) { + try { + syncCommitTransaction(tx); + shardMBean.incrementCommittedTransactionCount(); + } catch (InterruptedException | ExecutionException e) { + shardMBean.incrementFailedTransactionsCount(); + LOG.error(e, "Failed to commit"); + } + } + } + + recoveryCoordinator = null; + currentLogRecoveryBatch = null; + updateJournalStats(); + } + + @Override + protected void applyState(ActorRef clientActor, String identifier, Object data) { + + if (data instanceof CompositeModificationPayload) { + Object modification = ((CompositeModificationPayload) data).getModification(); + + if (modification != null) { + commit(clientActor, modification); + } else { + LOG.error( + "modification is null - this is very unexpected, clientActor = {}, identifier = {}", + identifier, clientActor != null ? clientActor.path().toString() : null); + } + + } else { + LOG.error("Unknown state received {} Class loader = {} CompositeNodeMod.ClassLoader = {}", + data, data.getClass().getClassLoader(), + CompositeModificationPayload.class.getClassLoader()); + } + + updateJournalStats(); + + } + + private void updateJournalStats() { + ReplicatedLogEntry lastLogEntry = getLastLogEntry(); + + if (lastLogEntry != null) { + shardMBean.setLastLogIndex(lastLogEntry.getIndex()); + shardMBean.setLastLogTerm(lastLogEntry.getTerm()); + } + + shardMBean.setCommitIndex(getCommitIndex()); + shardMBean.setLastApplied(getLastApplied()); + } + + @Override + protected void createSnapshot() { + if (createSnapshotTransaction == null) { + + // Create a transaction. We are really going to treat the transaction as a worker + // so that this actor does not get block building the snapshot + createSnapshotTransaction = createTransaction( + TransactionProxy.TransactionType.READ_ONLY.ordinal(), + "createSnapshot", ""); + + createSnapshotTransaction.tell( + new ReadData(YangInstanceIdentifier.builder().build()).toSerializable(), self()); + + } + } + + @VisibleForTesting + @Override + protected void applySnapshot(ByteString snapshot) { + // Since this will be done only on Recovery or when this actor is a Follower + // we can safely commit everything in here. We not need to worry about event notifications + // as they would have already been disabled on the follower + + LOG.info("Applying snapshot"); + try { + DOMStoreWriteTransaction transaction = store.newWriteOnlyTransaction(); + NormalizedNodeMessages.Node serializedNode = NormalizedNodeMessages.Node.parseFrom(snapshot); + NormalizedNode node = new NormalizedNodeToNodeCodec(schemaContext) + .decode(YangInstanceIdentifier.builder().build(), serializedNode); + + // delete everything first + transaction.delete(YangInstanceIdentifier.builder().build()); + + // Add everything from the remote node back + transaction.write(YangInstanceIdentifier.builder().build(), node); + syncCommitTransaction(transaction); + } catch (InvalidProtocolBufferException | InterruptedException | ExecutionException e) { + LOG.error(e, "An exception occurred when applying snapshot"); + } finally { + LOG.info("Done applying snapshot"); + } + } + + @Override protected void onStateChanged() { + for (ActorSelection dataChangeListener : dataChangeListeners) { + dataChangeListener + .tell(new EnableNotification(isLeader()), getSelf()); + } + + shardMBean.setRaftState(getRaftState().name()); + shardMBean.setCurrentTerm(getCurrentTerm()); + + // If this actor is no longer the leader close all the transaction chains + if(!isLeader()){ + for(Map.Entry entry : transactionChains.entrySet()){ + if(LOG.isDebugEnabled()) { + LOG.debug( + "onStateChanged: Closing transaction chain {} because shard {} is no longer the leader", + entry.getKey(), getId()); + } + entry.getValue().close(); + } + + transactionChains.clear(); + } + } + + @Override protected void onLeaderChanged(String oldLeader, String newLeader) { + shardMBean.setLeader(newLeader); + } + + @Override public String persistenceId() { + return this.name.toString(); + } + + private static class ShardCreator implements Creator { + + private static final long serialVersionUID = 1L; + + final ShardIdentifier name; + final Map peerAddresses; + final DatastoreContext datastoreContext; + final SchemaContext schemaContext; + + ShardCreator(ShardIdentifier name, Map peerAddresses, + DatastoreContext datastoreContext, SchemaContext schemaContext) { + this.name = name; + this.peerAddresses = peerAddresses; + this.datastoreContext = datastoreContext; + this.schemaContext = schemaContext; + } + + @Override + public Shard create() throws Exception { + return new Shard(name, peerAddresses, datastoreContext, schemaContext); + } + } + + @VisibleForTesting + NormalizedNode readStore(YangInstanceIdentifier id) + throws ExecutionException, InterruptedException { + DOMStoreReadTransaction transaction = store.newReadOnlyTransaction(); + + CheckedFuture>, ReadFailedException> future = + transaction.read(id); + + Optional> optional = future.get(); + NormalizedNode node = optional.isPresent()? optional.get() : null; + + transaction.close(); + + return node; + } + + @VisibleForTesting + void writeToStore(YangInstanceIdentifier id, NormalizedNode node) + throws ExecutionException, InterruptedException { + DOMStoreWriteTransaction transaction = store.newWriteOnlyTransaction(); + + transaction.write(id, node); + + syncCommitTransaction(transaction); + } + + @VisibleForTesting + ShardStats getShardMBean() { + return shardMBean; } }