Add TODO memos

Change-Id: I087b3c6ce3b9ad1fc5cab292a58af685f8b76609

@@ -3,6 +3,8 @@ package org.onlab.onos.store.cluster.messaging;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.store.cluster.impl.ClusterNodesDelegate;
 
+// TODO: This service interface can be removed, once we properly start
+// using ClusterService
 /**
  * Service for administering communications manager.
  */

@@ -2,6 +2,8 @@ package org.onlab.onos.store.cluster.messaging;
 
 import org.onlab.onos.cluster.NodeId;
 
+// TODO: ClusterMessage should be aware about how to serialize the payload
+// TODO: Should payload type be made generic?
 /**
  * Base message for cluster-wide communications.
  */

@@ -39,6 +39,7 @@ public class ClusterCommunicationManager
 
     private ControllerNode localNode;
     private ClusterNodesDelegate nodesDelegate;
+    // FIXME: `members` should go away and should be using ClusterService
     private Map<NodeId, ControllerNode> members = new HashMap<>();
     private final Timer timer = new Timer("onos-controller-heatbeats");
     public static final long HEART_BEAT_INTERVAL_MILLIS = 1000L;

@@ -3,6 +3,8 @@ package org.onlab.onos.store.cluster.messaging.impl;
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 
 public final class ClusterMessageSubjects {
+    // avoid instantiation
     private ClusterMessageSubjects() {}
+
     public static final MessageSubject CLUSTER_MEMBERSHIP_EVENT = new MessageSubject("CLUSTER_MEMBERSHIP_EVENT");
 }