Question

我们使用Spring缓存框架进行缓存，我们希望能够为缓存支持多个命名空间，例如“book”或“isbn”，缓存命名空间是可配置的，而不是在类中硬编码，喜欢，而不是

@Cacheable({ "book","isbn"})
public Book findBook(ISBN isbn) {...}

我们希望能够以某种方式从属性文件中注入缓存名称，以便可以动态设置缓存名称，如：

@Cacheable({ #cachename1, #cachename2})
public Book findBook(ISBN isbn) {...}

我在这里使用SpEL，但不知道这是否可行。

Answer 1

Spring 4.1引入了CacheResolver，并使用自定义的CacheResolver来选择Cache，然后可以是动态的。 spring 4.1 cache impovements

Answer 2

关闭smartwjw的答案......

我希望通过Spring环境变量解决cacheNames，例如@Cacheable("${my.config.property.name}")。我通过自定义CacheResolver

完成了此操作

import java.util.Collection;
import java.util.stream.Collectors;

import org.springframework.cache.CacheManager;
import org.springframework.cache.interceptor.CacheOperationInvocationContext;
import org.springframework.cache.interceptor.SimpleCacheResolver;
import org.springframework.core.env.PropertyResolver;

public class PropertyResolvingCacheResolver
    extends SimpleCacheResolver {

    private final PropertyResolver propertyResolver;

    protected PropertyResolvingCacheResolver(CacheManager cacheManager, PropertyResolver propertyResolver) {
        super(cacheManager);
        this.propertyResolver = propertyResolver;
    }

    @Override
    protected Collection<String> getCacheNames(CacheOperationInvocationContext<?> context) {
        Collection<String> unresolvedCacheNames = super.getCacheNames(context);
        return unresolvedCacheNames.stream()
            .map(unresolvedCacheName -> propertyResolver.resolveRequiredPlaceholders(unresolvedCacheName)).collect(Collectors.toList());
    }
}

当然，您必须将其配置为CacheResolver以与@Configuration扩展org.springframework.cache.annotation.CachingConfigurerSupport一起使用。

@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {

    public static final String PROPERTY_RESOLVING_CACHE_RESOLVER_BEAN_NAME = "propertyResolvingCacheResolver";

    @Autowired
    private CacheManager cacheManager;
    @Autowired
    private Environment springEnv;

    @Bean(PROPERTY_RESOLVING_CACHE_RESOLVER_BEAN_NAME)
    @Override
    public CacheResolver cacheResolver() {
        return new PropertyResolvingCacheResolver(cacheManager, springEnv);
    }
}

Answer 3

@Cacheable注释的缓存名称（value）属性不支持动态（SpEL或其他）表达式。您必须实现自己的org.springframework.cache.annotation.SpringCacheAnnotationParser版本并将其注入框架。

Answer 4

您也可以直接使用缓存，使所有内容更加可预测

EhCacheCacheManager cacheManager = (EhCacheCacheManager) CDBBeanFactory.instance().getBean("cacheManager");
CacheManager manager cacheManager.getCacheManager();
manager.getCache("cacheBin").get("key");
manager.getCache("cacheBin").put(new Element(key, obj));

等..

如何在Spring缓存中配置缓存名称？

4 个答案: