package org.opendaylight.controller.cluster.datastore;
import akka.actor.ActorRef;
-
+import akka.actor.PoisonPill;
+import com.google.common.base.Optional;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats;
+import org.opendaylight.controller.cluster.datastore.messages.CreateSnapshot;
import org.opendaylight.controller.cluster.datastore.messages.DataExists;
import org.opendaylight.controller.cluster.datastore.messages.ReadData;
+import org.opendaylight.controller.cluster.datastore.utils.SerializationUtils;
+import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransaction;
+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;
/**
* Date: 8/6/14
*/
public class ShardReadTransaction extends ShardTransaction {
+ private static final YangInstanceIdentifier DATASTORE_ROOT = YangInstanceIdentifier.builder().build();
+
private final DOMStoreReadTransaction transaction;
public ShardReadTransaction(DOMStoreReadTransaction transaction, ActorRef shardActor,
- SchemaContext schemaContext, ShardStats shardStats) {
- super(shardActor, schemaContext, shardStats);
+ SchemaContext schemaContext, ShardStats shardStats, String transactionID,
+ short clientTxVersion) {
+ super(shardActor, schemaContext, shardStats, transactionID, clientTxVersion);
this.transaction = transaction;
}
@Override
public void handleReceive(Object message) throws Exception {
- if(ReadData.SERIALIZABLE_CLASS.equals(message.getClass())) {
- readData(transaction, ReadData.fromSerializable(message));
+ if(message instanceof ReadData) {
+ readData(transaction, (ReadData) message, !SERIALIZED_REPLY);
+
+ } else if (message instanceof DataExists) {
+ dataExists(transaction, (DataExists) message, !SERIALIZED_REPLY);
+ } else if (message instanceof CreateSnapshot) {
+ createSnapshot();
+ } else if(ReadData.SERIALIZABLE_CLASS.equals(message.getClass())) {
+ readData(transaction, ReadData.fromSerializable(message), SERIALIZED_REPLY);
+
} else if(DataExists.SERIALIZABLE_CLASS.equals(message.getClass())) {
- dataExists(transaction, DataExists.fromSerializable(message));
+ dataExists(transaction, DataExists.fromSerializable(message), SERIALIZED_REPLY);
+
} else {
super.handleReceive(message);
}
}
+ private void createSnapshot() {
+
+ // This is a special message sent by the shard to send back a serialized snapshot of the whole
+ // data store tree. This transaction was created for that purpose only so we can
+ // self-destruct after sending the reply.
+
+ final ActorRef sender = getSender();
+ final ActorRef self = getSelf();
+ final ListenableFuture<Optional<NormalizedNode<?, ?>>> future = transaction.read(DATASTORE_ROOT);
+
+ Futures.addCallback(future, new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
+ @Override
+ public void onSuccess(Optional<NormalizedNode<?, ?>> result) {
+ byte[] serialized = SerializationUtils.serializeNormalizedNode(result.get());
+ sender.tell(new CaptureSnapshotReply(serialized), self);
+
+ self.tell(PoisonPill.getInstance(), self);
+ }
+
+ @Override
+ public void onFailure(Throwable t) {
+ sender.tell(new akka.actor.Status.Failure(t), self);
+
+ self.tell(PoisonPill.getInstance(), self);
+ }
+ });
+ }
+
@Override
protected DOMStoreTransaction getDOMStoreTransaction() {
return transaction;
}
+
+ @Override
+ protected boolean returnCloseTransactionReply() {
+ return false;
+ }
}