void initZuul() throws Exception, IllegalAccessException, InstantiationException {
RequestContext.setContextClass(NFRequestContext.class);
CounterFactory.initialize(new Counter());
TracerFactory.initialize(new Tracer());
LOG.info("Starting Groovy Filter file manager");
final AbstractConfiguration config = ConfigurationManager.getConfigInstance();
final String preFiltersPath = config.getString(ZUUL_FILTER_PRE_PATH);