CDS: use internal DataTree instance

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / ShardReadTransaction.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java
index be9c4d80e311484d0e6edea2050d85a0ebf28d1f..f2c77e32d87f3bf12e841e6f25fef15c6191e7bb 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardReadTransaction.java
@@ -11,24 +11,29 @@
 package org.opendaylight.controller.cluster.datastore;
 
 import akka.actor.ActorRef;
+import akka.actor.PoisonPill;
+import com.google.common.base.Optional;
 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.sal.core.spi.data.DOMStoreReadTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransaction;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.controller.cluster.datastore.utils.SerializationUtils;
+import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 
 /**
  * @author: syedbahm
  * Date: 8/6/14
  */
 public class ShardReadTransaction extends ShardTransaction {
-    private final DOMStoreReadTransaction transaction;
+    private static final YangInstanceIdentifier DATASTORE_ROOT = YangInstanceIdentifier.builder().build();
 
-    public ShardReadTransaction(DOMStoreReadTransaction transaction, ActorRef shardActor,
-            SchemaContext schemaContext, ShardStats shardStats, String transactionID,
-            short clientTxVersion) {
-        super(shardActor, schemaContext, shardStats, transactionID, clientTxVersion);
+    private final AbstractShardDataTreeTransaction<?> transaction;
+
+    public ShardReadTransaction(AbstractShardDataTreeTransaction<?> transaction, ActorRef shardActor,
+            ShardStats shardStats, String transactionID, short clientTxVersion) {
+        super(shardActor, shardStats, transactionID, clientTxVersion);
         this.transaction = transaction;
     }
 
@@ -39,7 +44,8 @@ public class ShardReadTransaction extends ShardTransaction {
 
         } 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);
 
@@ -51,8 +57,29 @@ public class ShardReadTransaction extends ShardTransaction {
         }
     }
 
+    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 Optional<NormalizedNode<?, ?>> result = transaction.getSnapshot().readNode(DATASTORE_ROOT);
+
+        byte[] serialized = SerializationUtils.serializeNormalizedNode(result.get());
+        sender.tell(new CaptureSnapshotReply(serialized), self);
+
+        self.tell(PoisonPill.getInstance(), self);
+    }
+
     @Override
-    protected DOMStoreTransaction getDOMStoreTransaction() {
+    protected AbstractShardDataTreeTransaction<?> getDOMStoreTransaction() {
         return transaction;
     }
+
+    @Override
+    protected boolean returnCloseTransactionReply() {
+        return false;
+    }
 }