+ private final ShardStats shardMBean;
+
+ private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
+
+ private Shard(ShardIdentifier name, Map<ShardIdentifier, String> peerAddresses) {
+ super(name.toString(), mapPeerAddresses(peerAddresses), Optional.of(configParams));
+
+ this.name = name;
+
+ String setting = System.getProperty("shard.persistent");
+
+ this.persistent = !"false".equals(setting);
+
+ LOG.info("Shard created : {} persistent : {}", name, persistent);
+
+ store = InMemoryDOMDataStoreFactory.create(name.toString(), null);
+
+ shardMBean = ShardMBeanFactory.getShardStatsMBean(name.toString());
+
+ }
+
+ 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) {
+ Preconditions.checkNotNull(name, "name should not be null");
+ Preconditions.checkNotNull(peerAddresses, "peerAddresses should not be null");
+
+ return Props.create(new Creator<Shard>() {
+
+ @Override
+ public Shard create() throws Exception {
+ return new Shard(name, peerAddresses);
+ }
+
+ });
+ }
+
+
+ @Override public void onReceiveCommand(Object message) {
+ LOG.debug("Received message {} from {}", message.getClass().toString(),
+ getSender());
+
+ if (message.getClass()
+ .equals(CreateTransactionChain.SERIALIZABLE_CLASS)) {
+ if (isLeader()) {
+ createTransactionChain();
+ } else if (getLeader() != null) {
+ getLeader().forward(message, getContext());
+ }
+ } 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 if (message instanceof PeerAddressResolved) {
+ PeerAddressResolved resolved = (PeerAddressResolved) message;
+ setPeerAddress(resolved.getPeerId().toString(), resolved.getPeerAddress());
+ } else {
+ super.onReceiveCommand(message);
+ }
+ }
+
+ private ActorRef createTypedTransactionActor(
+ CreateTransaction createTransaction, ShardTransactionIdentifier transactionId) {
+ if (createTransaction.getTransactionType()
+ == TransactionProxy.TransactionType.READ_ONLY.ordinal()) {
+
+ shardMBean.incrementReadOnlyTransactionCount();
+
+ return getContext().actorOf(
+ ShardTransaction
+ .props(store.newReadOnlyTransaction(), getSelf(),
+ schemaContext), transactionId.toString());
+
+ } else if (createTransaction.getTransactionType()
+ == TransactionProxy.TransactionType.READ_WRITE.ordinal()) {
+
+ shardMBean.incrementReadWriteTransactionCount();
+
+ return getContext().actorOf(
+ ShardTransaction
+ .props(store.newReadWriteTransaction(), getSelf(),
+ schemaContext), transactionId.toString());
+
+
+ } else if (createTransaction.getTransactionType()
+ == TransactionProxy.TransactionType.WRITE_ONLY.ordinal()) {
+
+ shardMBean.incrementWriteOnlyTransactionCount();
+
+ return getContext().actorOf(
+ ShardTransaction
+ .props(store.newWriteOnlyTransaction(), getSelf(),
+ schemaContext), transactionId.toString());
+ } else {
+ // FIXME: This does not seem right
+ throw new IllegalArgumentException(
+ "CreateTransaction message has unidentified transaction type="
+ + createTransaction.getTransactionType());
+ }
+ }
+
+ private void createTransaction(CreateTransaction createTransaction) {
+
+ ShardTransactionIdentifier transactionId = ShardTransactionIdentifier.builder().remoteTransactionId(createTransaction.getTransactionId()).build();
+ LOG.debug("Creating transaction : {} ", transactionId);
+ ActorRef transactionActor =
+ createTypedTransactionActor(createTransaction, transactionId);
+
+ getSender()
+ .tell(new CreateTransactionReply(
+ Serialization.serializedActorPath(transactionActor),
+ createTransaction.getTransactionId()).toSerializable(),
+ getSelf());
+ }
+
+ private void commit(final ActorRef sender, Object serialized) {
+ Modification modification = MutableCompositeModification
+ .fromSerializable(serialized, schemaContext);
+ DOMStoreThreePhaseCommitCohort cohort =
+ modificationToCohort.remove(serialized);
+ if (cohort == null) {
+ LOG.debug(
+ "Could not find cohort for modification : {}. Writing modification using a new transaction",
+ modification);
+ DOMStoreReadWriteTransaction transaction =
+ store.newReadWriteTransaction();
+ modification.apply(transaction);
+ DOMStoreThreePhaseCommitCohort commitCohort = transaction.ready();
+ ListenableFuture<Void> future =
+ commitCohort.preCommit();
+ try {
+ future.get();
+ future = commitCohort.commit();
+ future.get();
+ } catch (InterruptedException | ExecutionException e) {
+ shardMBean.incrementFailedTransactionsCount();
+ LOG.error("Failed to commit", e);
+ return;
+ }
+ //we want to just apply the recovery commit and return
+ shardMBean.incrementCommittedTransactionCount();
+ return;
+ }
+
+ final ListenableFuture<Void> future = cohort.commit();
+ final ActorRef self = getSelf();
+ future.addListener(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ future.get();
+ sender
+ .tell(new CommitTransactionReply().toSerializable(),
+ self);
+ shardMBean.incrementCommittedTransactionCount();
+ shardMBean.setLastCommittedTransactionTime(new Date());
+ } catch (InterruptedException | ExecutionException e) {
+ shardMBean.incrementFailedTransactionsCount();
+ sender.tell(new akka.actor.Status.Failure(e),self);
+ }
+ }
+ }, getContext().dispatcher());
+ }
+
+ 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();
+ store.onGlobalContextUpdated(message.getSchemaContext());
+ }
+
+ private void registerChangeListener(
+ RegisterChangeListener registerChangeListener) {
+
+ 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);
+
+ org.opendaylight.yangtools.concepts.ListenerRegistration<AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
+ registration =
+ store.registerChangeListener(registerChangeListener.getPath(),
+ listener, registerChangeListener.getScope());
+ ActorRef listenerRegistration =
+ getContext().actorOf(
+ DataChangeListenerRegistration.props(registration));
+
+ 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, schemaContext));
+ getSender()
+ .tell(new CreateTransactionChainReply(transactionChain.path())
+ .toSerializable(),
+ getSelf());