class InMemoryRepository implements SessionRepository {

  @Override
  public Collection<String> getOwnedSessionIds() {
    ArrayList<String> list = new ArrayList<>(sessionDataCache.size());
    for (SessionData sd : sessionDataCache.values()) {
      list.add(sd.getId());
    }
    return Collections.unmodifiableCollection(list);
  }

  public  InMemoryRepository(String namespace);

}