Add support for root DTCL listening on all shards in DS

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/AbstractDataStore.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/AbstractDataStore.java
index cddf234ffc47274947956d84a76322aa9bc7d174..8537c85698fa6a2759c224da3a7488d8c24dd95d 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/AbstractDataStore.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/AbstractDataStore.java
@@ -7,6 +7,7 @@
  */
 package org.opendaylight.controller.cluster.datastore;
 
+import static com.google.common.base.Preconditions.checkArgument;
 import static java.util.Objects.requireNonNull;
 
 import akka.actor.ActorRef;
@@ -17,6 +18,7 @@ import com.google.common.annotations.Beta;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Throwables;
 import com.google.common.util.concurrent.Uninterruptibles;
+import java.util.Set;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
@@ -159,6 +161,21 @@ public abstract class AbstractDataStore implements DistributedDataStoreInterface
         requireNonNull(treeId, "treeId should not be null");
         requireNonNull(listener, "listener should not be null");
 
+        /*
+         * We need to potentially deal with multi-shard composition for registration targeting the root of the data
+         * store. If that is the case, we delegate to a more complicated setup invol
+         */
+        if (treeId.isEmpty()) {
+            // User is targeting root of the datastore. If there is more than one shard, we have to register with them
+            // all and perform data composition.
+            final Set<String> shardNames = actorUtils.getConfiguration().getAllShardNames();
+            if (shardNames.size() > 1) {
+                checkArgument(listener instanceof ClusteredDOMDataTreeChangeListener,
+                    "Cannot listen on root without non-clustered listener %s", listener);
+                return new RootDataTreeChangeListenerProxy<>(actorUtils, listener, shardNames);
+            }
+        }
+
         final String shardName = actorUtils.getShardStrategyFactory().getStrategy(treeId).findShard(treeId);
         LOG.debug("Registering tree listener: {} for tree: {} shard: {}", listener, treeId, shardName);
 
@@ -169,7 +186,6 @@ public abstract class AbstractDataStore implements DistributedDataStoreInterface
         return listenerRegistrationProxy;
     }
 
-
     @Override
     public <C extends DOMDataTreeCommitCohort> DOMDataTreeCommitCohortRegistration<C> registerCommitCohort(
             final DOMDataTreeIdentifier subtree, final C cohort) {