List<Handler> handlers = p.getBinding().getHandlerChain();
if (handlers == null)
handlers = new ArrayList<Handler>();
handlers.add(new AddNumbersClientLogicalHandler4());
handlers.add(new AddNumbersClientLogicalHandler2());
p.getBinding().setHandlerChain(handlers);
AddNumbersHandlerAsyncCallback callback = new AddNumbersHandlerAsyncCallback();
Future<?> future = proxy.addNumbersHandlerAsync(10, 10, callback);