Adding query API in connection-mgr to retrieve node controllers

[controller.git] / opendaylight / connectionmanager / implementation / src / main / java / org / opendaylight / controller / connectionmanager / scheme / AbstractScheme.java

diff --git a/opendaylight/connectionmanager/implementation/src/main/java/org/opendaylight/controller/connectionmanager/scheme/AbstractScheme.java b/opendaylight/connectionmanager/implementation/src/main/java/org/opendaylight/controller/connectionmanager/scheme/AbstractScheme.java
index d7b1968429c7de4fb0053b76b8dc135984fc69e3..5ba156ea7cb4690f2147915f1f29163d1b46fec4 100644 (file)
--- a/opendaylight/connectionmanager/implementation/src/main/java/org/opendaylight/controller/connectionmanager/scheme/AbstractScheme.java
+++ b/opendaylight/connectionmanager/implementation/src/main/java/org/opendaylight/controller/connectionmanager/scheme/AbstractScheme.java
@@ -2,6 +2,7 @@ package org.opendaylight.controller.connectionmanager.scheme;
 
 import java.net.InetAddress;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.EnumSet;
 import java.util.HashSet;
 import java.util.Iterator;
@@ -134,7 +135,7 @@ public abstract class AbstractScheme {
 
     public Set<InetAddress> getControllers(Node node) {
         if (nodeConnections != null) return nodeConnections.get(node);
-        return null;
+        return Collections.emptySet();
     }
 
     public ConcurrentMap<Node, Set<InetAddress>> getNodeConnections() {