Stopping Drag & Drop upload immediately ...

I modified following exmaple for a drag & drop upload
https://dev.vaadin.com/svn/demo/sampler/src/com/vaadin/demo/sampler/features/dragndrop/DragDropHtml5ToFromDesktopExample.java
for my own purpose. This code works fine exept stopping the running uploads.

I implemented a stop button - stopping seems to “work” - the isInterrupted() method returns true for each pending upload and the streamingFinished() method is never called. So I can say, the code is working - but the problem the upload for the single files is not stopped immediately - it seems a greater amout of upolad data must be transfered to the server until the interruption can take place. I have no idea how I can change this behaviour.

Peter