code: public static HttpCallContext set(HttpServletRequest request, HttpServletResponse response, ServletContext servletContext)
  	{
  		final HttpCallContext ctx = new HttpCallContext(generateTraceId(request), request, response, servletContext);
  
  		contexts.set(ctx);
  
  		return ctx;
  	}
docs: Creates and associates an HttpCallContext with the current Thread
  
  @param request
  @param response
  
  @return