在没有XML的情况下在Spring 4中使用EhCache

问题描述

有没有办法在Spring 4或Spring Boot中初始化没有xml的EhCache？

Is there a way to initialize EhCache without xml in either Spring 4 or with Spring Boot?

我注意到Spring Boot 1.0.0.RC3没有任何内容ehcache依赖，但提到它改进了对EhCache的支持。此外，Spring 3具有类 org.springframework.cache.ehcache.EhCacheCacheManager ，但这不再是依赖项的一部分。

I noticed Spring Boot 1.0.0.RC3 doesn't have any ehcache dependencies but the Spring 4.0GA release post mentioned it has improved support for EhCache. Also, Spring 3 had the class org.springframework.cache.ehcache.EhCacheCacheManager but that's no longer part of the dependencies.

编辑：
Spring 4确实支持EhCache。您必须添加依赖项：

Spring 4 does have EhCache support. You must add the dependency:

<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>

Edit2：
我试过以下内容我我认为我很接近但是我收到了错误：

I've tried the following and I think I'm close but I'm getting an error:

@Bean
@Override
public CacheManager cacheManager() {
    CacheConfiguration cacheConfiguration = new CacheConfiguration();
    cacheConfiguration.setName("primary");
    cacheConfiguration.setMemoryStoreEvictionPolicy("LRU");
    cacheConfiguration.setMaxEntriesLocalHeap(0);

    net.sf.ehcache.config.Configuration config = new net.sf.ehcache.config.Configuration();
    config.addCache(cacheConfiguration);

    net.sf.ehcache.CacheManager cacheManager = new net.sf.ehcache.CacheManager(config);
    cacheManager.setName("EhCache");

    return new EhCacheCacheManager(cacheManager);
}

@Bean
public EhCacheManagerFactoryBean factoryBean() {
    return new EhCacheManagerFactoryBean();
}

错误

Caused by: net.sf.ehcache.CacheException: Another unnamed CacheManager already exists in the same VM. Please provide unique names for each CacheManager in the config or do one of following:
1. Use one of the CacheManager.create() static factory methods to reuse same CacheManager with same name or create one if necessary
2. Shutdown the earlier cacheManager before creating new one with same name.
The source of the existing CacheManager is: [Programmatically configured]
    at net.sf.ehcache.CacheManager.assertNoCacheManagerExistsWithSameName(CacheManager.java:590)
    at net.sf.ehcache.CacheManager.init(CacheManager.java:384)
    at net.sf.ehcache.CacheManager.<init>(CacheManager.java:263)
    at org.springframework.cache.ehcache.EhCacheManagerFactoryBean.afterPropertiesSet(EhCacheManagerFactoryBean.java:166)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
    ... 15 more

推荐答案

Spring中EhCache的无XML配置

XML-less configuration of EhCache in Spring

@Configuration
@EnableCaching
public class CachingConfig implements CachingConfigurer {
    @Bean(destroyMethod="shutdown")
    public net.sf.ehcache.CacheManager ehCacheManager() {
        CacheConfiguration cacheConfiguration = new CacheConfiguration();
        cacheConfiguration.setName("myCacheName");
        cacheConfiguration.setMemoryStoreEvictionPolicy("LRU");
        cacheConfiguration.setMaxEntriesLocalHeap(1000);

        net.sf.ehcache.config.Configuration config = new net.sf.ehcache.config.Configuration();
        config.addCache(cacheConfiguration);

        return net.sf.ehcache.CacheManager.newInstance(config);
    }

    @Bean
    @Override
    public CacheManager cacheManager() {
        return new EhCacheCacheManager(ehCacheManager());
    }

    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        return new SimpleKeyGenerator();
    }

    @Bean
    @Override
    public CacheResolver cacheResolver()    {
        return new SimpleCacheResolver();
    }

    @Bean
    @Override
    public CacheErrorHandler errorHandler() {
         return new SimpleCacheErrorHandler();
    }
}

或者对于测试，可以使用简单的ConcurrentMapCache运行没有XML，如下所示。

Alternatively for testing, you can use a simple ConcurrentMapCache running without XML as below.

@Configuration
@EnableCaching
public class CachingConfig implements CachingConfigurer {
    @Bean
    @Override
    public CacheManager cacheManager() {
        SimpleCacheManager cacheManager = new SimpleCacheManager();

        List<Cache> caches = new ArrayList<Cache>();
        caches.add(new ConcurrentMapCache("myCacheName"));
        cacheManager.setCaches(caches);

        return cacheManager;
    }

    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        return new SimpleKeyGenerator();
    }

    @Bean
    @Override
    public CacheResolver cacheResolver()    {
        return new SimpleCacheResolver();
    }

    @Bean
    @Override
    public CacheErrorHandler errorHandler() {
         return new SimpleCacheErrorHandler();
    }
}

编辑：已更新以添加关闭方法底层缓存
编辑：添加了错误处理程序和缓存解析程序的配置

这篇关于在没有XML的情况下在Spring 4中使用EhCache的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！