package org.opendaylight.controller.cluster.datastore;
+import akka.actor.ActorPath;
+import akka.actor.ActorSelection;
import com.google.common.base.Optional;
import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.ListenableFutureTask;
+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.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.schema.NormalizedNode;
+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.Executors;
+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 final TransactionType transactionType;
+ private final ActorContext actorContext;
+ private final Map<String, ActorSelection> remoteTransactionPaths = new HashMap<>();
+ private final String identifier;
+
+ public TransactionProxy(
+ ActorContext actorContext,
+ TransactionType transactionType) {
+
+ this.identifier = "transaction-" + counter.getAndIncrement();
+ this.transactionType = transactionType;
+ this.actorContext = actorContext;
+
+ Object response = actorContext.executeShardOperation(Shard.DEFAULT_NAME, new CreateTransaction(), ActorContext.ASK_DURATION);
+ if(response instanceof CreateTransactionReply){
+ CreateTransactionReply reply = (CreateTransactionReply) response;
+ remoteTransactionPaths.put(Shard.DEFAULT_NAME, actorContext.actorSelection(reply.getTransactionPath()));
+ }
+ }
+
@Override
- public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(InstanceIdentifier path) {
- throw new UnsupportedOperationException("read");
+ public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final InstanceIdentifier path) {
+ final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
+
+ Callable<Optional<NormalizedNode<?,?>>> call = new Callable() {
+
+ @Override public Optional<NormalizedNode<?,?>> call() throws Exception {
+ Object response = actorContext
+ .executeRemoteOperation(remoteTransaction, new ReadData(path),
+ ActorContext.ASK_DURATION);
+ if(response instanceof ReadDataReply){
+ ReadDataReply reply = (ReadDataReply) 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);
+
+ //FIXME : Use a thread pool here
+ Executors.newSingleThreadExecutor().submit(future);
+
+ return future;
}
@Override
public void write(InstanceIdentifier path, NormalizedNode<?, ?> data) {
- throw new UnsupportedOperationException("write");
+ final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
+ remoteTransaction.tell(new WriteData(path, data), null);
}
@Override
public void merge(InstanceIdentifier path, NormalizedNode<?, ?> data) {
- throw new UnsupportedOperationException("merge");
+ final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
+ remoteTransaction.tell(new MergeData(path, data), null);
}
@Override
public void delete(InstanceIdentifier path) {
- throw new UnsupportedOperationException("delete");
+ final ActorSelection remoteTransaction = remoteTransactionFromIdentifier(path);
+ remoteTransaction.tell(new DeleteData(path), null);
}
@Override
public DOMStoreThreePhaseCommitCohort ready() {
- throw new UnsupportedOperationException("ready");
+ List<ActorPath> cohortPaths = new ArrayList<>();
+
+ for(ActorSelection remoteTransaction : remoteTransactionPaths.values()) {
+ Object result = actorContext.executeRemoteOperation(remoteTransaction,
+ new ReadyTransaction(),
+ ActorContext.ASK_DURATION
+ );
+
+ if(result instanceof ReadyTransactionReply){
+ ReadyTransactionReply reply = (ReadyTransactionReply) result;
+ cohortPaths.add(reply.getCohortPath());
+ }
+ }
+
+ return new ThreePhaseCommitCohortProxy(actorContext, cohortPaths);
}
@Override
public Object getIdentifier() {
- throw new UnsupportedOperationException("getIdentifier");
+ return this.identifier;
}
@Override
public void close() {
- throw new UnsupportedOperationException("close");
+ for(ActorSelection remoteTransaction : remoteTransactionPaths.values()) {
+ remoteTransaction.tell(new CloseTransaction(), null);
+ }
+ }
+
+ private ActorSelection remoteTransactionFromIdentifier(InstanceIdentifier path){
+ String shardName = shardNameFromIdentifier(path);
+ return remoteTransactionPaths.get(shardName);
+ }
+
+ private String shardNameFromIdentifier(InstanceIdentifier path){
+ return Shard.DEFAULT_NAME;
}
}
Code Review / controller.git / blobdiff