@Inject
    public void init() throws Exception {
        if (!config.enabled) {
            return;
        }

        long startTime = System.currentTimeMillis();
        filterLoader.putFiltersForClasses(config.getClassNames());
        LOG.warn("Finished loading all zuul filters. Duration = {} ms.", (System.currentTimeMillis() - startTime));
    }
This class manages the loading of filters from a set of known packages.

@author Mikey Cohen
        Date: 12/7/11
        Time: 12:09 PM
zuul-core/src/main/java/com/netflix/zuul/FilterFileManager.java