class AbstractRegistry implements Registry {

    public List<URL> getCacheUrls(URL url) {
        for (Map.Entry<Object, Object> entry : properties.entrySet()) {
            String key = (String) entry.getKey();
            String value = (String) entry.getValue();
            if (StringUtils.isNotEmpty(key) && key.equals(url.getServiceKey())
                    && (Character.isLetter(key.charAt(0)) || key.charAt(0) == '_')
                    && StringUtils.isNotEmpty(value)) {
                String[] arr = value.trim().split(URL_SPLIT);
                List<URL> urls = new ArrayList<>();
                for (String u : arr) {
                    urls.add(URL.valueOf(u));
                }
                return urls;
            }
        }
        return null;
    }

    public  AbstractRegistry(URL url);

}