我已经实现了一个自定义CacheInterceptor
,可以通过通配符清除缓存:
public class CustomCacheInterceptor extends CacheInterceptor {
private static final Logger LOGGER = LoggerFactory.getLogger(CustomCacheInterceptor.class);
@Override
protected void doEvict(Cache cache, Object key) {
try {
// evict cache
} catch (RuntimeException ex) {
getErrorHandler().handleCacheEvictError(ex, cache, key);
}
}
}
现在我正在尝试使其工作:
@Configuration
public class CustomProxyCachingConfiguration extends ProxyCachingConfiguration {
private static final Logger LOGGER = LoggerFactory.getLogger(CustomProxyCachingConfiguration.class);
@Bean
public CacheInterceptor cacheInterceptor() {
LOGGER.info("Creating custom cache interceptor");
CacheInterceptor interceptor = new CustomCacheInterceptor();
interceptor.setCacheOperationSources(cacheOperationSource());
if (this.cacheResolver != null) {
interceptor.setCacheResolver(this.cacheResolver);
} else if (this.cacheManager != null) {
interceptor.setCacheManager(this.cacheManager);
}
if (this.keyGenerator != null) {
interceptor.setKeyGenerator(this.keyGenerator);
}
if (this.errorHandler != null) {
interceptor.setErrorHandler(this.errorHandler);
}
return interceptor;
}
}
问题是我的CustomCacheInterceptor
在默认情况下被覆盖:
Overriding user-defined bean definition for bean 'cacheInterceptor' with a framework-generated bean definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=customProxyCachingConfiguration; factoryMethodName=cacheInterceptor; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [com/package/test/CustomProxyCachingConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.cache.annotation.ProxyCachingConfiguration; factoryMethodName=cacheInterceptor; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/cache/annotation/ProxyCachingConfiguration.class]]
我尝试了不同的方法来解决此问题:
1)试图用ProxyCachingConfiguration
排除@ComponentScan(excludeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = ProxyCachingConfiguration.class))
并提供自己的BeanFactoryCacheOperationSourceAdvisor
-没帮助
2)尝试过@Primary
,但似乎仅在注射时有效-不适用于我的情况
3)尝试选择其他名称的bean-“ customCacheInterceptor”-在这种情况下,不会调用我的自定义类
4)尝试添加位于@DependsOn("cacheOperationSource")
中的ProxyCachinConfiguration
,以在配置之前使Spring加载ProxyCachinConfiguration
-没有帮助
最奇怪的事情是,有时我的配置在应用程序启动时获胜,并且一切正常
如何用CacheInterceptor
覆盖默认CustomCacheInterceptor
?
Spring Boot版本-2.0.0.RELEASE
答案 0 :(得分:0)
Spring bean的重载是混乱的,应该避免。给定名称的最后一个bean定义会创建实际的bean,但定义之间没有可预测的顺序,因为它取决于多个因素,例如Groovy vs XML vs JavaConfig。
从您的上下文ProxyCachingConfiguration
中排除@ComponentScan
配置类并自己重新定义,同时提供CacheInterceptor
和BeanFactoryCacheOperationSourceAdvisor
会更安全。
如果您的目标是只替换默认BeanFactoryCacheOperationSourceAdvisor
bean中的建议集,则可以定义一个新的BeanPostProcessor
bean,并在setAdvice()
期间调用postProcessBeforeInitialization()
。