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.persistence.UntypedProcessor;
-import com.google.common.util.concurrent.ListeningExecutorService;
-import com.google.common.util.concurrent.MoreExecutors;
-import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChain;
-import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChainReply;
+import akka.japi.Creator;
+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.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.CreateTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
+import org.opendaylight.controller.cluster.datastore.messages.ForwardedCommitTransaction;
+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.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 java.util.concurrent.Executors;
+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;
/**
- * A Shard represents a portion of the logical data tree
- * <p/>
+ * A Shard represents a portion of the logical data tree <br/>
+ * <p>
* Our Shard uses InMemoryDataStore as it's internal representation and delegates all requests it
- *
+ * </p>
*/
-public class Shard extends UntypedProcessor {
+public class Shard extends RaftActor {
+
+ public static final String DEFAULT_NAME = "default";
+
+ // The state of this Shard
+ private final InMemoryDOMDataStore store;
+
+ private final Map<Object, DOMStoreThreePhaseCommitCohort>
+ modificationToCohort = new HashMap<>();
+
+ private final LoggingAdapter LOG =
+ Logging.getLogger(getContext().system(), this);
+
+ // By default persistent will be true and can be turned off using the system
+ // property shard.persistent
+ private final boolean persistent;
+
+ /// The name of this shard
+ private final ShardIdentifier name;
+
+ private final ShardStats shardMBean;
+
+ private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
+
+ private final DatastoreContext datastoreContext;
+
+ private SchemaContext schemaContext;
+
+ private ActorRef createSnapshotTransaction;
+
+ /**
+ * Coordinates persistence recovery on startup.
+ */
+ private ShardRecoveryCoordinator recoveryCoordinator;
+ private List<Object> currentLogRecoveryBatch;
+
+ private final Map<String, DOMStoreTransactionChain> transactionChains = new HashMap<>();
+
+ protected Shard(ShardIdentifier name, Map<ShardIdentifier, String> 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("Shard created : {} persistent : {}", name, persistent);
- ListeningExecutorService storeExecutor = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2));
+ store = InMemoryDOMDataStoreFactory.create(name.toString(), null,
+ datastoreContext.getDataStoreProperties());
- private final InMemoryDOMDataStore store = new InMemoryDOMDataStore("OPER", storeExecutor);
+ if(schemaContext != null) {
+ store.onGlobalContextUpdated(schemaContext);
+ }
- LoggingAdapter log = Logging.getLogger(getContext().system(), this);
+ shardMBean = ShardMBeanFactory.getShardStatsMBean(name.toString(),
+ datastoreContext.getDataStoreMXBeanType());
+ shardMBean.setDataStoreExecutor(store.getDomStoreExecutor());
+ shardMBean.setNotificationManager(store.getDataChangeListenerNotificationManager());
- @Override
- public void onReceive(Object message) throws Exception {
- if (message instanceof CreateTransactionChain) {
- createTransactionChain();
- } else if(message instanceof RegisterChangeListener){
- registerChangeListener((RegisterChangeListener) message);
- } else if(message instanceof UpdateSchemaContext){
- updateSchemaContext((UpdateSchemaContext) message);
+ if (isMetricsCaptureEnabled()) {
+ getContext().become(new MeteringBehavior(this));
+ }
}
- }
- private void updateSchemaContext(UpdateSchemaContext message) {
- store.onGlobalContextUpdated(message.getSchemaContext());
- }
+ private static Map<String, String> mapPeerAddresses(
+ Map<ShardIdentifier, String> peerAddresses) {
+ Map<String, String> map = new HashMap<>();
+
+ for (Map.Entry<ShardIdentifier, String> entry : peerAddresses
+ .entrySet()) {
+ map.put(entry.getKey().toString(), entry.getValue());
+ }
+
+ return map;
+ }
+
+ public static Props props(final ShardIdentifier name,
+ final Map<ShardIdentifier, String> 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");
+
+ 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 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.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) {
+ 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(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(final ActorRef sender, Object serialized) {
+ Modification modification = MutableCompositeModification
+ .fromSerializable(serialized, schemaContext);
+ DOMStoreThreePhaseCommitCohort cohort =
+ modificationToCohort.remove(serialized);
+ if (cohort == null) {
+ // 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;
+ }
+
+ ListenableFuture<Void> future = cohort.commit();
+
+ Futures.addCallback(future, new FutureCallback<Void>() {
+ @Override
+ 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());
+ }
+ });
+
+ }
+
+ 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(serializedModification, message.getCohort());
+
+ if (persistent) {
+ this.persistData(getSender(), "identifier",
+ new CompositeModificationPayload(serializedModification));
+ } else {
+ 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) {
- org.opendaylight.yangtools.concepts.ListenerRegistration<AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>>> registration =
- store.registerChangeListener(registerChangeListener.getPath(), registerChangeListener.getListener(), registerChangeListener.getScope());
- ActorRef listenerRegistration = getContext().actorOf(ListenerRegistration.props(registration));
- getSender().tell(new RegisterChangeListenerReply(listenerRegistration.path()), getSelf());
- }
+ private void registerChangeListener(
+ RegisterChangeListener registerChangeListener) {
- private void createTransactionChain() {
- DOMStoreTransactionChain chain = store.createTransactionChain();
- ActorRef transactionChain = getContext().actorOf(ShardTransactionChain.props(chain));
- getSender().tell(new CreateTransactionChainReply(transactionChain.path()), getSelf());
- }
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("registerDataChangeListener for {}", registerChangeListener
+ .getPath());
+ }
+
+
+ ActorSelection dataChangeListenerPath = getContext()
+ .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());
+
+ // 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);
+
+ AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>
+ listener = new DataChangeListenerProxy(schemaContext, dataChangeListenerPath);
+
+ ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
+ 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 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<DOMStoreWriteTransaction> 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<String, DOMStoreTransactionChain> 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<Shard> {
+
+ private static final long serialVersionUID = 1L;
+
+ final ShardIdentifier name;
+ final Map<ShardIdentifier, String> peerAddresses;
+ final DatastoreContext datastoreContext;
+ final SchemaContext schemaContext;
+
+ ShardCreator(ShardIdentifier name, Map<ShardIdentifier, String> 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<Optional<NormalizedNode<?, ?>>, ReadFailedException> future =
+ transaction.read(id);
+
+ Optional<NormalizedNode<?, ?>> 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;
+ }
}
Code Review / controller.git / blobdiff