Evictable caches are caches that support eviction (invalidation) correctly.
If you are already using Guava's com.google.common.cache.CacheBuilder,
just replace it with EvictableCacheBuilder. EvictableCacheBuilder is
designed to be a drop-in replacement, providing strong visibility guarantees
while hiding all the gory details behind Guava Cache and LoadingCache
interfaces you're already familiar with.
Cache<String, Value> cache = EvictableCacheBuilder.newBuilder()
.maximumSize(10_000)
.expireAfterWrite(1, TimeUnit.HOURS)
.build();— or —
LoadingCache<String, Value> loadingCache = EvictableCacheBuilder.newBuilder()
.maximumSize(10_000)
.expireAfterWrite(1, TimeUnit.HOURS)
.build(CacheLoader.from((String key) -> ...));Get it from Maven Central
<dependency>
<groupId>io.github.findepi</groupId>
<artifactId>evictable-cache</artifactId>
<version>2</version>
</dependency>- Guava
Cache(which this library is baseed on). Awesome if you do not need strong visibility guarantees afterinvalidate()(or when you do not needinvalidate()at all), or when cache usage is not concurrent (multi-threaded). - Caffeine (recommended by Guava javadocs). It comes in two flavors: synchronous and async.
- Synchronous is awesome if you don't mind that invalidation blocks waiting for ongoing loads to finish.
- Async is awesome if you do not need strong visibility guarantees after
invalidate(), or some infrequent race conditions are acceptable.