JCache - JSR 107

Giriş

İlk olarak 2011 yılında Java EE 7 ile ortaya çıktı. Açıklaması şöyle

The JVM ecosystem has an official Cache API, known as JCache, or JSR 107. It’s a specification with an API that describes four annotations, i.e., @CacheResult, @CachePut, @CacheRemove, and @CacheRemoveAll. Vendors are to implement the specification.

The Spring framework is pretty widespread in the JVM ecosystem. It also provides a caching API. Historically, it predates JCache. While different, the API is very similar to JCache’s. Spring offers out-of-the-box integration code for a couple of caches, while a couple of others do provide Spring integration.

Java Cache Providers

Liste şöyle. Bunların içinden sadece Guava ve Geode JCache desteği sunmuyor.

1. Java Caching System
2. Guava
3. Caffeine
4. Ehcache
5. Infinispan
6. Coherence Community Edition
7. Ignite
8. Geode
9. Hazelcast

Spring vs JCache

Anotasyonlar şöyle

JCache API interfaces

Önemli sınıflar şöyle

1. javax.cache.CacheManager

2. javax.cache.Cache 

3. javax.cache.configuration.Configuration

JCache Annotations 

@CacheResult

@CachePut

@CacheRemove

CacheManager Arayüzü

Şu satırı dahil ederiz

import javax.cache.CacheManager;

Açıklaması şöyle

It enables us to establish, configure and close Caches.

Bu arayüzü gerçekleştiren sınıflardan birisi. İlgili notlarım burada

import com.hazelcast.cache.HazelcastCacheManager;

@CacheResult

Örnek

Şöyle yaparız

public class ServiceImpl {

  @Override
  @CacheResult(cacheName = ..., cacheKeyGenerator = DefaultObjectsCacheKeyGenerator.class)
  public Foo getObject(@CacheKey String userId, @CacheKey String customerId) {
    ...
  }
}