BUG 2676 : Use notification-dispatcher for DataChangeListener actors

[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 91d629432f41f7633d128dd6c17e03a283c6bc18..2e66ef918e6e7541592449e9b51405610f4826a6 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
@@ -11,11 +11,21 @@
 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;
 
 /**
@@ -23,27 +33,72 @@ 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,String shardName) {
-        super(shardActor, schemaContext, shardName);
+            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;
+    }
 }