Fixed issue where a shard for a defined module is not found

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
index 999d0f8bafca9639baa70ea7c893656f87704ae7..9cda3f1aa168ee43c40f715753a49ecdbace8369 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
@@ -25,6 +25,7 @@ import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChain;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChainReply;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
 import org.opendaylight.controller.cluster.datastore.messages.ForwardedCommitTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.PeerAddressResolved;
 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
@@ -42,7 +43,9 @@ 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 java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
@@ -74,10 +77,12 @@ public class Shard extends RaftActor {
 
     private final String name;
 
-    private SchemaContext schemaContext;
+    private volatile SchemaContext schemaContext;
 
     private final ShardStats shardMBean;
 
+    private final List<ActorSelection> dataChangeListeners = new ArrayList<>();
+
     private Shard(String name, Map<String, String> peerAddresses) {
         super(name, peerAddresses);
 
@@ -136,13 +141,29 @@ public class Shard extends RaftActor {
         }
     }
 
+   private ActorRef createTypedTransactionActor(CreateTransaction createTransaction,String transactionId){
+      if(createTransaction.getTransactionType()== TransactionProxy.TransactionType.READ_ONLY.ordinal()){
+        return getContext().actorOf(
+            ShardTransaction.props( store.newReadOnlyTransaction(), getSelf(), schemaContext), transactionId);
+
+      }else if (createTransaction.getTransactionType()== TransactionProxy.TransactionType.READ_WRITE.ordinal()){
+        return getContext().actorOf(
+            ShardTransaction.props( store.newReadWriteTransaction(), getSelf(), schemaContext), transactionId);
+
+
+      }else if (createTransaction.getTransactionType()== TransactionProxy.TransactionType.WRITE_ONLY.ordinal()){
+        return getContext().actorOf(
+            ShardTransaction.props( store.newWriteOnlyTransaction(), getSelf(), schemaContext), transactionId);
+      }else{
+        throw new IllegalArgumentException ("CreateTransaction message has unidentified transaction type="+createTransaction.getTransactionType()) ;
+      }
+   }
+
     private void createTransaction(CreateTransaction createTransaction) {
-        DOMStoreReadWriteTransaction transaction =
-            store.newReadWriteTransaction();
+
         String transactionId = "shard-" + createTransaction.getTransactionId();
         LOG.info("Creating transaction : {} " , transactionId);
-        ActorRef transactionActor = getContext().actorOf(
-            ShardTransaction.props(transaction, getSelf(), schemaContext), transactionId);
+        ActorRef transactionActor = createTypedTransactionActor(createTransaction,transactionId);
 
         getSender()
             .tell(new CreateTransactionReply(Serialization.serializedActorPath(transactionActor), createTransaction.getTransactionId()).toSerializable(),
@@ -155,10 +176,23 @@ public class Shard extends RaftActor {
             modificationToCohort.remove(serialized);
         if (cohort == null) {
             LOG.error(
-                "Could not find cohort for modification : " + modification);
+                "Could not find cohort for modification : {}", modification);
             LOG.info("Writing modification using a new transaction");
-            modification.apply(store.newReadWriteTransaction());
-            return;
+            DOMStoreReadWriteTransaction transaction =
+                store.newReadWriteTransaction();
+            modification.apply(transaction);
+            DOMStoreThreePhaseCommitCohort commitCohort = transaction.ready();
+            ListenableFuture<Void> future =
+                commitCohort.preCommit();
+            try {
+                future.get();
+                future = commitCohort.commit();
+                future.get();
+            } catch (InterruptedException e) {
+                LOG.error("Failed to commit", e);
+            } catch (ExecutionException e) {
+                LOG.error("Failed to commit", e);
+            }
         }
 
         final ListenableFuture<Void> future = cohort.commit();
@@ -213,6 +247,16 @@ public class Shard extends RaftActor {
             .system().actorSelection(
                 registerChangeListener.getDataChangeListenerPath());
 
+
+        // Notify the listener if notifications should be enabled or not
+        // If this shard is the leader then it will enable notifications else
+        // it will not
+        dataChangeListenerPath.tell(new EnableNotification(isLeader()), getSelf());
+
+        // Now store a reference to the data change listener so it can be notified
+        // at a later point if notifications should be enabled or disabled
+        dataChangeListeners.add(dataChangeListenerPath);
+
         AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>
             listener = new DataChangeListenerProxy(schemaContext,dataChangeListenerPath);
 
@@ -248,7 +292,14 @@ public class Shard extends RaftActor {
         if(data instanceof CompositeModificationPayload){
             Object modification =
                 ((CompositeModificationPayload) data).getModification();
-            commit(clientActor, modification);
+
+            if(modification != null){
+                commit(clientActor, modification);
+            } else {
+                LOG.error("modification is null - this is very unexpected");
+            }
+
+
         } else {
             LOG.error("Unknown state received {}", data);
         }
@@ -263,6 +314,12 @@ public class Shard extends RaftActor {
         throw new UnsupportedOperationException("applySnapshot");
     }
 
+    @Override protected void onStateChanged() {
+        for(ActorSelection dataChangeListener : dataChangeListeners){
+            dataChangeListener.tell(new EnableNotification(isLeader()), getSelf());
+        }
+    }
+
     @Override public String persistenceId() {
         return this.name;
     }