刷新一個Bean而不@RefreshScope

配置變化我有一個@Configuration類，如下所示：刷新一個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);線基本上民調遠程Maven倉庫，並刷新kieContainer對象每隔10秒，如果有一個新的工件。

，並在我的上層（如服務層）的地方，我有：

@Service 
@RefreshScope 
public class SampleService { 

    @Autowired 
    private KieBase kBase; 

}

的kBase對象不刷新（至少不能以新的kieContainer對象）據我所見，當我撥打/refresh端點時。我沒有集中配置，當我撥打/refresh時，我收到了一條警告。我想要實現的是在每次更新kieContainer時都會有一個新的kBase對象。我怎樣才能做到這一點？謝謝！

來源

2017-02-24 Hasan Can Saral

刷新不會遍歷層次結構。它只是清除緩存，並在下一個引用（通過它創建的代理）上重新創建bean。在你的情況下，因爲KieBase不是@RefreshScope，它不會被重新創建。因此，將@RefreshScope添加到KieBase聲明中。如果SampleService不需要重新創建，請刪除@RefreshScope註釋。

來源

2017-02-24 16:00:26 spencergibb

謝謝，感謝答案。但現在我得到了'java.lang.ClassCastException：$ Proxy11不能轉換爲some.package.KnowledgeBaseImpl'。有什麼想法嗎？ –

-1

的文檔狀態：

@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標註一個@RefreshScope也對KieBase @Bean。

來源

2017-02-24 16:08:20

刷新一個Bean而不@RefreshScope

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