resilience-5-getFromCacheOrThrow.java

private T getFromCacheOrThrow(String key, RuntimeException exception) {
  var value = cache.findById(key);

  value.ifPresent((v) -> {
    log.info(String.format("FallbackCache[%s] got cached value", cb.getName()), v);
  });

  return value
      .map(Cacheable::data)
      .orElseThrow(() -> {
            log.error(
                String.format("FallbackCache[%s] got an error without a cached value", cb.getName()),
                exception
            );
            throw exception;
          }
      );
}