Populating Cache with CacheLoader not working, cache remains empty

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1

Hi,

I am trying to use the CacheLoader mechanism, but unfortunately the cache remains empty after usage.

CacheLoader<String, String> loader;

loader = new CacheLoader<String, String>() {
    @Nonnull
    @Override
    public String load(@Nonnull String s) {
      LOGGER.debug("runner loader");
      return "Test";
    }
};

Cache<String, String> c;
c = this.cacheManager.getCache("demo.cache", loader, new CacheSettingsBuilder().expireAfterAccess(30, TimeUnit.MINUTES).build());
c.get("test1");

LOGGER.debug(c.getKeys().size())

Everytime the REST Endpoint gets executed, the loader runs and the returns the result. The cache size remains 0.

Best regards,
Alex