package org.opendaylight.controller.cluster.datastore;
import akka.actor.ActorRef;
+import akka.actor.ActorSelection;
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.serialization.Serialization;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
+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.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.PeerAddressResolved;
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.raft.RaftActor;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore;
+import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
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.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import java.util.ArrayList;
import java.util.HashMap;
+import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
* 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";
+ public static final String DEFAULT_NAME = "default";
- private final ListeningExecutorService storeExecutor = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2));
+ private final ListeningExecutorService storeExecutor =
+ MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2));
- private final InMemoryDOMDataStore store;
+ private final InMemoryDOMDataStore store;
- private final Map<Modification, DOMStoreThreePhaseCommitCohort> modificationToCohort = new HashMap<>();
+ private final Map<Object, DOMStoreThreePhaseCommitCohort>
+ modificationToCohort = new HashMap<>();
- private final LoggingAdapter log = Logging.getLogger(getContext().system(), this);
+ private final LoggingAdapter LOG =
+ Logging.getLogger(getContext().system(), this);
- private Shard(String name){
- store = new InMemoryDOMDataStore(name, storeExecutor);
- }
+ // By default persistent will be true and can be turned off using the system
+ // property persistent
+ private final boolean persistent;
- public static Props props(final String name) {
- return Props.create(new Creator<Shard>() {
+ private final String name;
- @Override
- public Shard create() throws Exception {
- return new Shard(name);
- }
+ private volatile SchemaContext schemaContext;
+
+ private final ShardStats shardMBean;
+
+ private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
+
+ private Shard(String name, Map<String, String> peerAddresses) {
+ super(name, peerAddresses);
+
+ this.name = name;
+
+ String setting = System.getProperty("shard.persistent");
+
+ this.persistent = !"false".equals(setting);
+
+ LOG.info("Creating shard : {} persistent : {}", name, persistent);
+
+ store = new InMemoryDOMDataStore(name, storeExecutor);
+
+ shardMBean = ShardMBeanFactory.getShardStatsMBean(name);
- });
- }
-
- @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);
- } else if (message instanceof ForwardedCommitTransaction ) {
- handleForwardedCommit((ForwardedCommitTransaction) message);
- } else if (message instanceof Persistent){
- commit((Persistent) message);
}
- }
-
- private void commit(Persistent message) {
- Modification modification = (Modification) message.payload();
- DOMStoreThreePhaseCommitCohort cohort = modificationToCohort.remove(modification);
- if(cohort == null){
- log.error("Could not find cohort for modification : " + modification);
- return;
+
+ public static Props props(final String name, final Map<String, String> peerAddresses) {
+ return Props.create(new Creator<Shard>() {
+
+ @Override
+ public Shard create() throws Exception {
+ return new Shard(name, peerAddresses);
+ }
+
+ });
}
- final ListenableFuture<Void> future = cohort.commit();
- final ActorRef sender = getSender();
- final ActorRef self = getSelf();
- future.addListener(new Runnable() {
- @Override
- public void run() {
- try {
- future.get();
- sender.tell(new CommitTransactionReply(), self);
- } catch (InterruptedException | ExecutionException e) {
- log.error(e, "An exception happened when committing");
+
+
+ @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.getClass().equals(RegisterChangeListener.SERIALIZABLE_CLASS)) {
+ registerChangeListener(RegisterChangeListener.fromSerializable(getContext().system(), 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(), resolved.getPeerAddress());
+ } else {
+ super.onReceiveCommand(message);
}
+ }
+
+ private ActorRef createTypedTransactionActor(CreateTransaction createTransaction,String transactionId){
+ if(createTransaction.getTransactionType()== TransactionProxy.TransactionType.READ_ONLY.ordinal()){
+ return getContext().actorOf(
+ ShardTransaction.props( store.newReadOnlyTransaction(), getSelf(), schemaContext), transactionId);
+
+ }else if (createTransaction.getTransactionType()== TransactionProxy.TransactionType.READ_WRITE.ordinal()){
+ return getContext().actorOf(
+ ShardTransaction.props( store.newReadWriteTransaction(), getSelf(), schemaContext), transactionId);
+
+
+ }else if (createTransaction.getTransactionType()== TransactionProxy.TransactionType.WRITE_ONLY.ordinal()){
+ return getContext().actorOf(
+ ShardTransaction.props( store.newWriteOnlyTransaction(), getSelf(), schemaContext), transactionId);
+ }else{
+ throw new IllegalArgumentException ("CreateTransaction message has unidentified transaction type="+createTransaction.getTransactionType()) ;
}
- }, getContext().dispatcher());
- }
-
- private void handleForwardedCommit(ForwardedCommitTransaction message) {
- log.info("received forwarded transaction");
- modificationToCohort.put(message.getModification(), message.getCohort());
- getSelf().forward(Persistent.create(message.getModification()), getContext());
- }
-
- private void updateSchemaContext(UpdateSchemaContext message) {
- store.onGlobalContextUpdated(message.getSchemaContext());
- }
-
- 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 createTransactionChain() {
- DOMStoreTransactionChain chain = store.createTransactionChain();
- ActorRef transactionChain = getContext().actorOf(ShardTransactionChain.props(chain));
- getSender().tell(new CreateTransactionChainReply(transactionChain.path()), getSelf());
- }
+ }
+
+ private void createTransaction(CreateTransaction createTransaction) {
+
+ String transactionId = "shard-" + createTransaction.getTransactionId();
+ LOG.info("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.error(
+ "Could not find cohort for modification : {}", modification);
+ LOG.info("Writing modification using a new transaction");
+ 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 e) {
+ LOG.error("Failed to commit", e);
+ } catch (ExecutionException e) {
+ LOG.error("Failed to commit", e);
+ }
+ }
+
+ final ListenableFuture<Void> future = cohort.commit();
+ shardMBean.incrementCommittedTransactionCount();
+ final ActorRef self = getSelf();
+ future.addListener(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ future.get();
+
+ if(sender != null) {
+ sender
+ .tell(new CommitTransactionReply().toSerializable(),
+ self);
+ } else {
+ LOG.error("sender is null ???");
+ }
+ } catch (InterruptedException | ExecutionException e) {
+ // FIXME : Handle this properly
+ LOG.error(e, "An exception happened when committing");
+ }
+ }
+ }, 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()).toSerializable(),
+ getSelf());
+ }
+
+ private void createTransactionChain() {
+ DOMStoreTransactionChain chain = store.createTransactionChain();
+ ActorRef transactionChain =
+ getContext().actorOf(
+ ShardTransactionChain.props(chain, schemaContext));
+ getSender()
+ .tell(new CreateTransactionChainReply(transactionChain.path())
+ .toSerializable(),
+ getSelf());
+ }
+
+ @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");
+ }
+
+
+ } else {
+ LOG.error("Unknown state received {}", data);
+ }
+
+ }
+
+ @Override protected Object createSnapshot() {
+ throw new UnsupportedOperationException("createSnapshot");
+ }
+
+ @Override protected void applySnapshot(Object snapshot) {
+ throw new UnsupportedOperationException("applySnapshot");
+ }
+
+ @Override protected void onStateChanged() {
+ for(ActorSelection dataChangeListener : dataChangeListeners){
+ dataChangeListener.tell(new EnableNotification(isLeader()), getSelf());
+ }
+ }
+
+ @Override public String persistenceId() {
+ return this.name;
+ }
}