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javacachingcaffeine

Is there a CacheEntryExpiredListener for Caffeine Cache?

I know Cache2k having a CacheEntryExpiredListener that is only triggered if a cache entry self-expires (not when being invalidated explicit).

 Cache<String, Object> cache = Cache2kBuilder.of(String.class, Object.class)
    .addListener(
        (CacheEntryExpiredListener<String, Object>) (cache, entry)
              -> handleExpired(entry.getKey(), entry.getValue()))
    .expireAfterWrite(60, TimeUnit.SECONDS)
    .build();

Question: how could I achieve the same using caffeine cache implementation?

Solution

  • Thanks to the hint from @Ben Manes:

    Caffeine.newBuilder()
        .removalListener((key, value, cause) -> {
            if (cause.wasEvicted()) System.out.printf("key=%s, value=%s", key, value);
        })
        .expireAfterWrite(60, TimeUnit.SECONDS)
        .build();