How to use

authClientSessionSetMapper

method

in

org.keycloak.models.sessions.infinispan.stream.Mappers

@Override
public Map<String, Long> getActiveClientSessionStats(RealmModel realm, boolean offline) {
  Cache<String, SessionEntityWrapper<UserSessionEntity>> cache = getCache(offline);
  cache = CacheDecorators.skipCacheLoaders(cache);
  return cache.entrySet().stream()
      .filter(UserSessionPredicate.create(realm.getId()))
      .map(Mappers.authClientSessionSetMapper())
      .flatMap((Serializable & Function<Set<String>, Stream<? extends String>>)Mappers::toStream)
      .collect(
          CacheCollectors.serializableCollector(
              () -> Collectors.groupingBy(Function.identity(), Collectors.counting())
          )
      );
}