List<Handler> handlers = p.getBinding().getHandlerChain();
if (handlers == null)
handlers = new ArrayList<Handler>();
handlers.add(new AddNumbersClientLogicalHandler4());
handlers.add(new AddNumbersClientLogicalHandler3());
handlers.add(new AddNumbersClientLogicalHandler());
p.getBinding().setHandlerChain(handlers);
int total = proxy.addNumbersHandler(99,10);