X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FClusterWrapperImpl.java;h=be162d9304ee205d5fde8afee03f72d822d81296;hb=0175a376323f6c916b5a4340a27751ebef22fc83;hp=56229132f34c3dec9a61ea1ea4377831f2af3274;hpb=4e3f49788c05730b29468deebc2aaa4ed0d94eef;p=controller.git

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ClusterWrapperImpl.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ClusterWrapperImpl.java
index 56229132f3..be162d9304 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ClusterWrapperImpl.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ClusterWrapperImpl.java
@@ -5,15 +5,16 @@
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
  * and is available at http://www.eclipse.org/legal/epl-v10.html
  */
-
 package org.opendaylight.controller.cluster.datastore;
 
+import static com.google.common.base.Preconditions.checkState;
+import static java.util.Objects.requireNonNull;
+
 import akka.actor.ActorRef;
 import akka.actor.ActorSystem;
 import akka.actor.Address;
 import akka.cluster.Cluster;
 import akka.cluster.ClusterEvent;
-import com.google.common.base.Preconditions;
 import org.opendaylight.controller.cluster.access.concepts.MemberName;
 
 public class ClusterWrapperImpl implements ClusterWrapper {
@@ -21,27 +22,22 @@ public class ClusterWrapperImpl implements ClusterWrapper {
     private final MemberName currentMemberName;
     private final Address selfAddress;
 
-    public ClusterWrapperImpl(ActorSystem actorSystem){
-        Preconditions.checkNotNull(actorSystem, "actorSystem should not be null");
+    public ClusterWrapperImpl(final ActorSystem actorSystem) {
+        cluster = Cluster.get(requireNonNull(actorSystem, "actorSystem should not be null"));
 
-        cluster = Cluster.get(actorSystem);
-
-        Preconditions.checkState(cluster.getSelfRoles().size() > 0,
-            "No akka roles were specified\n" +
-                "One way to specify the member name is to pass a property on the command line like so\n" +
-                "   -Dakka.cluster.roles.0=member-3\n" +
-                "member-3 here would be the name of the member"
-        );
+        checkState(cluster.getSelfRoles().size() > 0,
+            "No akka roles were specified.\n"
+            + "One way to specify the member name is to pass a property on the command line like so\n"
+            + "   -Dakka.cluster.roles.0=member-3\n"
+            + "member-3 here would be the name of the member");
 
         currentMemberName = MemberName.forName(cluster.getSelfRoles().iterator().next());
         selfAddress = cluster.selfAddress();
     }
 
     @Override
-    public void subscribeToMemberEvents(ActorRef actorRef){
-        Preconditions.checkNotNull(actorRef, "actorRef should not be null");
-
-        cluster.subscribe(actorRef, ClusterEvent.initialStateAsEvents(),
+    public void subscribeToMemberEvents(final ActorRef actorRef) {
+        cluster.subscribe(requireNonNull(actorRef, "actorRef should not be null"), ClusterEvent.initialStateAsEvents(),
             ClusterEvent.MemberEvent.class,
             ClusterEvent.UnreachableMember.class,
             ClusterEvent.ReachableMember.class);