class MemcachedResponseStore extends ResponseStore {

    @Override
    public void invalidate(String key) {
        checkNotNull(key);
        checkArgument(key.length() > 0, "key can not be empty");

        if (!_readOnly) {
            _client.delete(buildKey(key));
        }
    }

    public  MemcachedResponseStore(MemcachedClient client, String keyPrefix, boolean readOnly);

}