NETVIRT-1630 migrate to md-sal APIs

[netvirt.git] / vpnmanager / impl / src / main / java / org / opendaylight / netvirt / vpnmanager / iplearn / IpMonitorStartTask.java

diff --git a/vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/iplearn/IpMonitorStartTask.java b/vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/iplearn/IpMonitorStartTask.java
index b47cfd07391efe001e267ecc876e5607d1e097a1..a1273ce70a216c209213b2052696563eb900aa0f 100644 (file)
--- a/vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/iplearn/IpMonitorStartTask.java
+++ b/vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/iplearn/IpMonitorStartTask.java
@@ -8,11 +8,12 @@
 package org.opendaylight.netvirt.vpnmanager.iplearn;
 
 import com.google.common.util.concurrent.ListenableFuture;
+import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Callable;
 import org.opendaylight.netvirt.vpnmanager.iplearn.model.MacEntry;
 
-public class IpMonitorStartTask implements Callable<List<ListenableFuture<Void>>> {
+public class IpMonitorStartTask implements Callable<List<? extends ListenableFuture<?>>> {
     private final MacEntry macEntry;
     private final Long arpMonitorProfileId;
     private final AlivenessMonitorUtils alivenessMonitorUtils;
@@ -26,6 +27,6 @@ public class IpMonitorStartTask implements Callable<List<ListenableFuture<Void>>
     @Override
     public List<ListenableFuture<Void>> call() {
         alivenessMonitorUtils.startIpMonitoring(macEntry, arpMonitorProfileId);
-        return null;
+        return Collections.emptyList();
     }
 }