public List<String> getResourceFactoryClassNames() {
    return parseCommaDelimitedStrings(get(CONFIG_REST_RESOURCE_FACTORIES));
  }
@see SamzaRestConfig#CONFIG_REST_RESOURCE_FACTORIES
@return a list of class names as Strings corresponding to factories
         that Samza REST should use to instantiate and register resources
         or an empty list if none were configured.
samza-rest/src/main/java/org/apache/samza/rest/SamzaRestConfig.java