package org.opendaylight.controller.cluster.datastore;
+import akka.actor.ActorPath;
+import akka.actor.ActorRef;
+import akka.actor.ActorSelection;
+import akka.actor.Props;
import com.google.common.base.Optional;
+import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.ListenableFutureTask;
+import org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException;
+import org.opendaylight.controller.cluster.datastore.messages.CloseTransaction;
+import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
+import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.DeleteData;
+import org.opendaylight.controller.cluster.datastore.messages.MergeData;
+import org.opendaylight.controller.cluster.datastore.messages.ReadData;
+import org.opendaylight.controller.cluster.datastore.messages.ReadDataReply;
+import org.opendaylight.controller.cluster.datastore.messages.ReadyTransaction;
+import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.WriteData;
+import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
+import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
-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 org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.atomic.AtomicLong;
/**
* TransactionProxy acts as a proxy for one or more transactions that were created on a remote shard
- *
+ * <p>
* Creating a transaction on the consumer side will create one instance of a transaction proxy. If during
* the transaction reads and writes are done on data that belongs to different shards then a separate transaction will
* be created on each of those shards by the TransactionProxy
- *
+ *</p>
+ * <p>
* The TransactionProxy does not make any guarantees about atomicity or order in which the transactions on the various
* shards will be executed.
- *
+ * </p>
*/
public class TransactionProxy implements DOMStoreReadWriteTransaction {
+ public enum TransactionType {
+ READ_ONLY,
+ WRITE_ONLY,
+ READ_WRITE
+ }
+
+ private static final AtomicLong counter = new AtomicLong();
+
+ private static final Logger
+ LOG = LoggerFactory.getLogger(TransactionProxy.class);
+
+
+ private final TransactionType transactionType;
+ private final ActorContext actorContext;
+ private final Map<String, TransactionContext> remoteTransactionPaths = new HashMap<>();
+ private final String identifier;
+ private final ExecutorService executor;
+ private final SchemaContext schemaContext;
+
+ public TransactionProxy(
+ ActorContext actorContext,
+ TransactionType transactionType,
+ ExecutorService executor,
+ SchemaContext schemaContext
+ ) {
+
+ this.identifier = actorContext.getCurrentMemberName() + "-txn-" + counter.getAndIncrement();
+ this.transactionType = transactionType;
+ this.actorContext = actorContext;
+ this.executor = executor;
+ this.schemaContext = schemaContext;
+
+
+ }
+
@Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(InstanceIdentifier path) {
- throw new UnsupportedOperationException("read");
+ public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final YangInstanceIdentifier path) {
+
+ createTransactionIfMissing(actorContext, path);
+
+ return transactionContext(path).readData(path);
}
@Override
- public void write(InstanceIdentifier path, NormalizedNode<?, ?> data) {
- throw new UnsupportedOperationException("write");
+ public void write(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+
+ createTransactionIfMissing(actorContext, path);
+
+ transactionContext(path).writeData(path, data);
}
@Override
- public void merge(InstanceIdentifier path, NormalizedNode<?, ?> data) {
- throw new UnsupportedOperationException("merge");
+ public void merge(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+
+ createTransactionIfMissing(actorContext, path);
+
+ transactionContext(path).mergeData(path, data);
}
@Override
- public void delete(InstanceIdentifier path) {
- throw new UnsupportedOperationException("delete");
+ public void delete(YangInstanceIdentifier path) {
+
+ createTransactionIfMissing(actorContext, path);
+
+ transactionContext(path).deleteData(path);
}
@Override
public DOMStoreThreePhaseCommitCohort ready() {
- throw new UnsupportedOperationException("ready");
+ List<ActorPath> cohortPaths = new ArrayList<>();
+
+ for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
+ Object result = transactionContext.readyTransaction();
+
+ if(result.getClass().equals(ReadyTransactionReply.SERIALIZABLE_CLASS)){
+ ReadyTransactionReply reply = ReadyTransactionReply.fromSerializable(actorContext.getActorSystem(),result);
+ String resolvedCohortPath = transactionContext
+ .getResolvedCohortPath(reply.getCohortPath().toString());
+ cohortPaths.add(actorContext.actorFor(resolvedCohortPath));
+ }
+ }
+
+ return new ThreePhaseCommitCohortProxy(actorContext, cohortPaths, identifier, executor);
}
@Override
public Object getIdentifier() {
- throw new UnsupportedOperationException("getIdentifier");
+ return this.identifier;
}
@Override
public void close() {
- throw new UnsupportedOperationException("close");
+ for(TransactionContext transactionContext : remoteTransactionPaths.values()) {
+ transactionContext.closeTransaction();
+ }
+ }
+
+ private TransactionContext transactionContext(YangInstanceIdentifier path){
+ String shardName = shardNameFromIdentifier(path);
+ return remoteTransactionPaths.get(shardName);
+ }
+
+ private String shardNameFromIdentifier(YangInstanceIdentifier path){
+ return ShardStrategyFactory.getStrategy(path).findShard(path);
+ }
+
+ private void createTransactionIfMissing(ActorContext actorContext, YangInstanceIdentifier path) {
+ String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
+
+ TransactionContext transactionContext =
+ remoteTransactionPaths.get(shardName);
+
+ if(transactionContext != null){
+ // A transaction already exists with that shard
+ return;
+ }
+
+ try {
+ Object response = actorContext.executeShardOperation(shardName,
+ new CreateTransaction(identifier).toSerializable(),
+ ActorContext.ASK_DURATION);
+ if (response.getClass()
+ .equals(CreateTransactionReply.SERIALIZABLE_CLASS)) {
+ CreateTransactionReply reply =
+ CreateTransactionReply.fromSerializable(response);
+
+ String transactionPath = reply.getTransactionPath();
+
+ LOG.info("Received transaction path = {}" , transactionPath );
+
+ ActorSelection transactionActor =
+ actorContext.actorSelection(transactionPath);
+ transactionContext =
+ new TransactionContextImpl(shardName, transactionPath,
+ transactionActor);
+
+ remoteTransactionPaths.put(shardName, transactionContext);
+ }
+ } catch(TimeoutException e){
+ remoteTransactionPaths.put(shardName, new NoOpTransactionContext(shardName));
+ }
}
+
+ private interface TransactionContext {
+ String getShardName();
+
+ String getResolvedCohortPath(String cohortPath);
+
+ public void closeTransaction();
+
+ public Object readyTransaction();
+
+ void deleteData(YangInstanceIdentifier path);
+
+ void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data);
+
+ ListenableFuture<Optional<NormalizedNode<?, ?>>> readData(final YangInstanceIdentifier path);
+
+ void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data);
+ }
+
+
+ private class TransactionContextImpl implements TransactionContext{
+ private final String shardName;
+ private final String actorPath;
+ private final ActorSelection actor;
+
+
+ private TransactionContextImpl(String shardName, String actorPath,
+ ActorSelection actor) {
+ this.shardName = shardName;
+ this.actorPath = actorPath;
+ this.actor = actor;
+ }
+
+ @Override public String getShardName() {
+ return shardName;
+ }
+
+ private ActorSelection getActor() {
+ return actor;
+ }
+
+ @Override public String getResolvedCohortPath(String cohortPath){
+ return actorContext.resolvePath(actorPath, cohortPath);
+ }
+
+ @Override public void closeTransaction() {
+ getActor().tell(
+ new CloseTransaction().toSerializable(), null);
+ }
+
+ @Override public Object readyTransaction() {
+ return actorContext.executeRemoteOperation(getActor(),
+ new ReadyTransaction().toSerializable(),
+ ActorContext.ASK_DURATION
+ );
+
+ }
+
+ @Override public void deleteData(YangInstanceIdentifier path) {
+ getActor().tell(new DeleteData(path).toSerializable(), null);
+ }
+
+ @Override public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data){
+ getActor().tell(new MergeData(path, data, schemaContext).toSerializable(), null);
+ }
+
+ @Override public ListenableFuture<Optional<NormalizedNode<?, ?>>> readData(final YangInstanceIdentifier path) {
+
+ Callable<Optional<NormalizedNode<?,?>>> call = new Callable() {
+
+ @Override public Optional<NormalizedNode<?,?>> call() throws Exception {
+ Object response = actorContext
+ .executeRemoteOperation(getActor(), new ReadData(path).toSerializable(),
+ ActorContext.ASK_DURATION);
+ if(response.getClass().equals(ReadDataReply.SERIALIZABLE_CLASS)){
+ ReadDataReply reply = ReadDataReply.fromSerializable(schemaContext,path, response);
+ if(reply.getNormalizedNode() == null){
+ return Optional.absent();
+ }
+ //FIXME : A cast should not be required here ???
+ return (Optional<NormalizedNode<?, ?>>) Optional.of(reply.getNormalizedNode());
+ }
+
+ return Optional.absent();
+ }
+ };
+
+ ListenableFutureTask<Optional<NormalizedNode<?, ?>>>
+ future = ListenableFutureTask.create(call);
+
+ executor.submit(future);
+
+ return future;
+ }
+
+ @Override public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
+ getActor().tell(new WriteData(path, data, schemaContext).toSerializable(), null);
+ }
+
+ }
+
+ private class NoOpTransactionContext implements TransactionContext {
+
+ private final Logger
+ LOG = LoggerFactory.getLogger(NoOpTransactionContext.class);
+
+ private final String shardName;
+
+ private ActorRef cohort;
+
+ public NoOpTransactionContext(String shardName){
+ this.shardName = shardName;
+ }
+ @Override public String getShardName() {
+ return shardName;
+
+ }
+
+ @Override public String getResolvedCohortPath(String cohortPath) {
+ return cohort.path().toString();
+ }
+
+ @Override public void closeTransaction() {
+ LOG.error("closeTransaction called");
+ }
+
+ @Override public Object readyTransaction() {
+ LOG.error("readyTransaction called");
+ cohort = actorContext.getActorSystem().actorOf(Props.create(NoOpCohort.class));
+ return new ReadyTransactionReply(cohort.path()).toSerializable();
+ }
+
+ @Override public void deleteData(YangInstanceIdentifier path) {
+ LOG.error("deleteData called path = {}", path);
+ }
+
+ @Override public void mergeData(YangInstanceIdentifier path,
+ NormalizedNode<?, ?> data) {
+ LOG.error("mergeData called path = {}", path);
+ }
+
+ @Override
+ public ListenableFuture<Optional<NormalizedNode<?, ?>>> readData(
+ YangInstanceIdentifier path) {
+ LOG.error("readData called path = {}", path);
+ return Futures.immediateFuture(
+ Optional.<NormalizedNode<?, ?>>absent());
+ }
+
+ @Override public void writeData(YangInstanceIdentifier path,
+ NormalizedNode<?, ?> data) {
+ LOG.error("writeData called path = {}", path);
+ }
+ }
+
+
+
}
Code Review / controller.git / blobdiff