try (GZIPOutputStream gos = new GZIPOutputStream(baos)) {
                    gos.write(hash.getBytes(Constants.UTF_8));
                }
                return SIMILAR_DOC_HASH_PREFIX + Base64.getUrlEncoder().withoutPadding().encodeToString(baos.toByteArray());
            } catch (final IOException e) {
                logger.warn("Failed to encode {}", hash, e);
            }
        }
        return hash;
    }

        }

        refresh();
    }

    private String getId(final String sessionId, final String url) {
        final String id = sessionId + ID_SEPARATOR + new String(Base64.getUrlEncoder().withoutPadding().encode(url.getBytes(UTF_8)), UTF_8);
        if (id.length() <= idPrefixLength) {
            return id;
        }