刷新一个Bean而不@RefreshScope

配置变化我有一个@Configuration类，如下所示：刷新一个Bean而不@RefreshScope

@Configuration 
public class SampleKieConfiguration { 

    @Bean 
    public KieServices kieServices() { 
     return KieServices.Factory.get(); 
    } 

    @Bean 
    public KieContainer kieContainer() { 

     ReleaseId releaseId = kieServices().newReleaseId("groupId", "artifactId", "version"); 
     KieContainer kieContainer = kieServices().newKieContainer(releaseId); 
     kieServices().newKieScanner(kieContainer).start(10_000); 
     return kieContainer; 
    } 

    @Bean 
    public KieBase kieBase() { 

     KieBaseConfiguration kieBaseConfiguration = kieServices().newKieBaseConfiguration(); 
     kieBaseConfiguration.setOption(EqualityBehaviorOption.EQUALITY); 
     kieBaseConfiguration.setOption(EventProcessingOption.CLOUD); 
     return kieContainer().newKieBase(kieBaseConfiguration); 
    } 
}

kieServices().newKieScanner(kieContainer).start(10_000);线基本上民调远程Maven仓库，并刷新kieContainer对象每隔10秒，如果有一个新的工件。

，并在我的上层（如服务层）的地方，我有：

@Service 
@RefreshScope 
public class SampleService { 

    @Autowired 
    private KieBase kBase; 

}

的kBase对象不刷新（至少不能以新的kieContainer对象）据我所见，当我拨打/refresh端点时。我没有集中配置，当我拨打/refresh时，我收到了一条警告。我想要实现的是在每次更新kieContainer时都会有一个新的kBase对象。我怎样才能做到这一点？谢谢！

来源

2017-02-24 Hasan Can Saral

刷新不会遍历层次结构。它只是清除缓存，并在下一个引用（通过它创建的代理）上重新创建bean。在你的情况下，因为KieBase不是@RefreshScope，它不会被重新创建。因此，将@RefreshScope添加到KieBase声明中。如果SampleService不需要重新创建，请删除@RefreshScope注释。

来源

2017-02-24 16:00:26 spencergibb

谢谢，感谢答案。但现在我得到了'java.lang.ClassCastException：$ Proxy11不能转换为some.package.KnowledgeBaseImpl'。有什么想法吗？ –

-1

的文档状态：

@RefreshScope works (technically) on an @Configuration class, but it might lead to surprising behaviour: 
e.g. it does not mean that all the @Beans defined in that class are themselves @RefreshScope. 
Specifically, anything that depends on those beans cannot rely on them being updated when a refresh is initiated, 
unless it is itself in @RefreshScope (in which it will be rebuilt on a refresh and its dependencies re-injected, 
at which point they will be re-initialized from the refreshed @Configuration).

所以我想你不得不直接标注一个@RefreshScope也对KieBase @Bean。

来源

2017-02-24 16:08:20

刷新一个Bean而不@RefreshScope

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