将 Ehcache CacheManager (v 3.x) 转换为 Spring CacheManager，无需 XML 配置

Question

我正在尝试在我的应用程序中使用Ehcache管理器。我想在没有xml配置的情况下设置它。 我有以下依赖项：

<dependency>
    <groupId>org.ehcache</groupId>
    <artifactId>ehcache</artifactId>
    <version>3.6.0</version>
</dependency>
<dependency>
    <groupId>javax.cache</groupId>
    <artifactId>cache-api</artifactId>
    <version>1.0.0</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>5.1.1.RELEASE</version>
</dependency>

我有一个这样的CacheManager bean：

@Bean
public org.springframework.cache.CacheManager cacheManager() {
    org.ehcache.CacheManager mainPageCache = CacheManagerBuilder
            .newCacheManagerBuilder()
            .withCache("mainPageCache", CacheConfigurationBuilder
                    .newCacheConfigurationBuilder(
                            Pageable.class,
                            Collection.class,
                            ResourcePoolsBuilder.heap(10))
                    .withExpiry(ExpiryPolicyBuilder
                            .timeToLiveExpiration(Duration
                                    .of(10, ChronoUnit.SECONDS))))
            .build(true);
    // ...
}

能否将Ehcache CacheManager转换为Spring CacheManager？ 我认为应该有类似以下代码的东西：return new JCacheCacheManager(/*一些代码*/);

- bovae

---

你构建的缓存管理器根本没有使用JCache，所以你需要首先这样做，请参见http://www.ehcache.org/documentation/3.0/107.html。 - Stephane Nicoll

Answer 1

你不能简单地将ehcache CacheManager转换为spring CacheManager。

您可以使用 org.ehcache.jsr107.EhcacheCachingProvider 获取一个 javax.cache.CacheManager 并将其提供给 org.springframework.cache.jcache.JCacheCacheManager ，后者是jcache（又名jsr107）的 org.springframework.cache.CacheManager 实现。

import java.util.HashMap;
import java.util.Map;

import javax.cache.CacheManager;
import javax.cache.Caching;

import org.ehcache.config.CacheConfiguration;
import org.ehcache.config.ResourcePools;
import org.ehcache.config.builders.CacheConfigurationBuilder;
import org.ehcache.config.builders.ResourcePoolsBuilder;
import org.ehcache.config.units.EntryUnit;
import org.ehcache.config.units.MemoryUnit;
import org.ehcache.core.config.DefaultConfiguration;
import org.ehcache.jsr107.EhcacheCachingProvider;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.jcache.JCacheCacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableCaching
public class CacheConfig {


    @Bean
    public JCacheCacheManager jCacheCacheManager() {
        JCacheCacheManager jCacheManager = new JCacheCacheManager(cacheManager());
        return jCacheManager;
    }

    @Bean(destroyMethod = "close")
    public CacheManager cacheManager() {

        ResourcePools resourcePools = ResourcePoolsBuilder.newResourcePoolsBuilder()
                .heap(2000, EntryUnit.ENTRIES)
                .offheap(100, MemoryUnit.MB)
                .build();


        CacheConfiguration<Object,Object> cacheConfiguration = CacheConfigurationBuilder.newCacheConfigurationBuilder(
                Object.class,
                Object.class,
                resourcePools).
                build();

        Map<String, CacheConfiguration<?, ?>> caches = new HashMap<>();
        caches.put("myCache", cacheConfiguration);

        EhcacheCachingProvider provider = (EhcacheCachingProvider) Caching.getCachingProvider("org.ehcache.jsr107.EhcacheCachingProvider");
        org.ehcache.config.Configuration configuration = new DefaultConfiguration(caches, provider.getDefaultClassLoader());

        return  provider.getCacheManager(provider.getDefaultURI(), (org.ehcache.config.Configuration) configuration);
    }

}

如果你在使用spring-boot，它应该会自动为你配置JCacheCacheManager。然后你可以使用JCacheManagerCustomizer来配置高速缓存。

- pcoates