class MemcacheClientWrapper extends AbstractMemcacheClientWrapper {

    @Override
    public boolean add(final String key, final int exp, final Object value) throws TimeoutException, CacheException {
        try {
            return memcachedClient.add(key, exp, value);
        } catch (MemcachedException | InterruptedException e) {
            throw new CacheException(e);
        }
    }

      MemcacheClientWrapper(final MemcachedClient memcachedClient);

}