Question

我有一个@Configuration课程如下：

@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);行基本上轮询一个远程maven存储库，并且如果有新工件，则每10秒刷新一次kieContainer对象。

在我的上层（例如服务层）的某个地方，我有：

@Service
@RefreshScope
public class SampleService {

    @Autowired
    private KieBase kBase;

}

当我调用kBase端点时，kieContainer对象不会刷新（至少不会使用新的/refresh对象）。我没有集中配置，当我拨打/refresh时，我收到了警告。我想要实现的是每次刷新kBase时都有一个新的kieContainer对象。我怎样才能做到这一点？谢谢！

Answer 1

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。在您的情况下，由于KieBase不是@RefreshScope，因此不会重新创建。因此，请在@RefreshScope声明中添加KieBase。如果SampleService确实不需要重新创建，请删除@RefreshScope注释。

Answer 2

正如文件所述：

@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).

所以我猜你也必须直接在@RefreshScope @Bean上注释KieBase。

使用@RefreshScope

2 个答案: