Github user DaanHoogland commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/1403#discussion_r62881152
  
    --- Diff: 
engine/storage/volume/src/org/apache/cloudstack/storage/volume/VolumeServiceImpl.java
 ---
    @@ -554,6 +574,51 @@ protected Void 
managedCopyBaseImageCallback(AsyncCallbackDispatcher<VolumeServic
             return null;
         }
     
    +    protected Void 
createManagedTemplateImageCallback(AsyncCallbackDispatcher<VolumeServiceImpl, 
CreateCmdResult> callback, CreateVolumeContext<CreateCmdResult> context) {
    +        CreateCmdResult result = callback.getResult();
    +        VolumeApiResult res = new VolumeApiResult(null);
    +
    +        res.setResult(result.getResult());
    +
    +        AsyncCallFuture<VolumeApiResult> future = context.getFuture();
    +        DataObject templateOnPrimaryStoreObj = context.getVolume();
    +
    +        if (result.isSuccess()) {
    +            
((TemplateObject)templateOnPrimaryStoreObj).setInstallPath(result.getPath());
    +            
templateOnPrimaryStoreObj.processEvent(Event.OperationSuccessed, 
result.getAnswer());
    +        }
    +        else {
    +            templateOnPrimaryStoreObj.processEvent(Event.OperationFailed);
    +        }
    +
    +        future.complete(res);
    +
    +        return null;
    --- End diff --
    
    why Void and return null instead of void and return?


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