requestContexts = (RequestContextChainingService) factory.getBean("requestContexts");
ServletRunner servletRunner = new ServletRunner();
servletRunner.registerServlet("/app1/*", MyServlet.class.getName());
ServletUnitClient client = servletRunner.newClient();
InvocationContext ic = client.newInvocation(url);
MyServlet servlet = (MyServlet) ic.getServlet();
rc = requestContexts.getRequestContext(servlet.getServletContext(), ic.getRequest(), ic.getResponse());
}