java - 如何在没有xml的情况下使用spring boot 2和ehcache 3？

Question

现在我有以下配置:

@Configuration
@EnableCaching
public class EhcacheConfig {
    @Bean
    public CacheManager cacheManager() throws URISyntaxException {
        return new JCacheCacheManager(Caching.getCachingProvider().getCacheManager(
                getClass().getResource("/ehcache.xml").toURI(),
                getClass().getClassLoader()
        ));
    }
}

它引用了以下 XML:

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://www.ehcache.org/v3"
        xmlns:jsr107="http://www.ehcache.org/v3/jsr107"
        xsi:schemaLocation="
            http://www.ehcache.org/v3 http://www.ehcache.org/schema/ehcache-core-3.0.xsd
            http://www.ehcache.org/v3/jsr107 http://www.ehcache.org/schema/ehcache-107-ext-3.0.xsd">

    <cache alias="pow_cache">
        <key-type>org.springframework.cache.interceptor.SimpleKey</key-type>
        <value-type>java.lang.Double</value-type>
        <expiry>
            <ttl unit="seconds">15</ttl>
        </expiry>

        <listeners>
            <listener>
                <class>my.pack.CacheEventLogger</class>
                <event-firing-mode>ASYNCHRONOUS</event-firing-mode>
                <event-ordering-mode>UNORDERED</event-ordering-mode>
                <events-to-fire-on>CREATED</events-to-fire-on>
                <events-to-fire-on>EXPIRED</events-to-fire-on>
            </listener>
        </listeners>

        <resources>
            <heap unit="entries">2</heap>
            <offheap unit="MB">10</offheap>
        </resources>
    </cache>

</config>

服务看起来像这样:

@Cacheable(value = "pow_cache", unless = "#pow==3||#result>100", condition = "#val<5")
public Double pow(int val, int pow) throws InterruptedException {
    System.out.println(String.format("REAL invocation myService.pow(%s, %s)", val, pow));
    Thread.sleep(3000);
    return Math.pow(val, pow);
}

它工作正常，但我想摆脱 xml 配置。

我已阅读并尝试申请 following answer (最后一段代码)但它仅适用于 Ehcache 2 但我将使用 Eehcache 3

我怎样才能实现它？

Answer 1

作为 EhCache seems to be JSR-107 compliant ，您需要以这种方式使用它来进行编程配置:

@Bean
public CacheManager cacheManager() throws URISyntaxException {
    CachingProvider provider = Caching.getCachingProvider();  
    CacheManager cacheManager = provider.getCacheManager();   

    CacheConfigurationBuilder<SimpleKey, Double> configuration = 
    CacheConfigurationBuilder.newCacheConfigurationBuilder(org.springframework.cache.interceptor.SimpleKey.class,
        java.lang.Double.class, 
        ResourcePoolsBuilder.heap(2).offheap(10, MemoryUnit.MB))
        .withExpiry(Expirations.timeToLiveExpiration(new Duration(15, TimeUnit.SECONDS)));

    Cache cache = cacheManager.createCache("pow_cache", configuration);
    cache.getRuntimeConfiguration().registerCacheEventListener(listener, EventOrdering.UNORDERED,
        EventFiring.ASYNCHRONOUS, EnumSet.of(EventType.CREATED, EventType.EXPIRED)); 
    return cacheManager;
}

我自己还没有测试过，但这应该适合你。

查看 this programatic sample with more configuration options来自 EhCache 存储库和 how to register listeners programatically 上的文档部分也是。