Java 将Eventbus注入Vaadin中的Spring服务

我想将会话范围的事件总线注入到带有Spring引导的Vaadin项目中的Spring服务中

我的服务如下：

@Service
@EnableVaadinEventBus
public class MyService implements EventBusListener<Object> {


    @Autowired
    EventBus.SessionEventBus eventBus;

    @PostConstruct
    void init() {
        eventBus.subscribe(this);
    }

    void myServiceMethod() {
       ....
    }

    @Override
    public void onEvent(Event<Object> event) {}

}

我猜这个错误的原因是，服务是单例的，而eventbus是会话范围的。 代理是这个问题的解决方案吗？如果是这样，我如何为我的eventbus创建

更新

使用@EventBusProxy注释时，我得到一个不同的错误，显示eventBus已代理：

java.lang.IllegalStateException: No VaadinSession bound to current thread
    at com.vaadin.spring.internal.VaadinSessionScope$VaadinSessionBeanStoreRetrievalStrategy.getVaadinSession(VaadinSessionScope.java:119) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at com.vaadin.spring.internal.VaadinSessionScope$VaadinSessionBeanStoreRetrievalStrategy.getBeanStore(VaadinSessionScope.java:131) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at com.vaadin.spring.internal.VaadinSessionScope.getBeanStore(VaadinSessionScope.java:96) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at com.vaadin.spring.internal.VaadinSessionScope.get(VaadinSessionScope.java:72) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:339) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    ... 36 common frames omitted
Wrapped by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.proxiedSessionEventBus': Scope 'vaadin-session' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No VaadinSession bound to current thread
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:354) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:187) ~[spring-aop-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at com.sun.proxy.$Proxy103.subscribe(Unknown Source) ~[na:na]
    at MyService.init(MyService.java:61) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:354) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:305) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:133) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    ... 24 common frames omitted
Wrapped by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myService': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.proxiedSessionEventBus': Scope 'vaadin-session' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No VaadinSession bound to current thread
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834) ~[spring-context-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:667) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:342) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:273) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:980) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:969) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at MyApplication.main(MyApplication.java:34) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:435) [spring-boot-maven-plugin-1.3.0.M5.jar:1.3.0.M5]

---

我需要myService的代理吗？这个bean应该仍然是单例的，不是吗？？？

我刚刚找到@EventBusProxy注释，但我仍然得到相同的错误…我想我得到了：不能调用eventBus.subscribethis；在一个用@PostConstruct注释的方法中，因为调用这个方法时没有可用的会话……但是，我不知道如何处理这个问题。

java.lang.IllegalStateException: No VaadinSession bound to current thread
    at com.vaadin.spring.internal.VaadinSessionScope$VaadinSessionBeanStoreRetrievalStrategy.getVaadinSession(VaadinSessionScope.java:119) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at com.vaadin.spring.internal.VaadinSessionScope$VaadinSessionBeanStoreRetrievalStrategy.getBeanStore(VaadinSessionScope.java:131) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at com.vaadin.spring.internal.VaadinSessionScope.getBeanStore(VaadinSessionScope.java:96) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at com.vaadin.spring.internal.VaadinSessionScope.get(VaadinSessionScope.java:72) ~[vaadin-spring-1.0.0.beta3.jar:1.0.0.beta3]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:339) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    ... 36 common frames omitted
Wrapped by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.proxiedSessionEventBus': Scope 'vaadin-session' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No VaadinSession bound to current thread
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:354) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:187) ~[spring-aop-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at com.sun.proxy.$Proxy103.subscribe(Unknown Source) ~[na:na]
    at MyService.init(MyService.java:61) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:354) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:305) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:133) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    ... 24 common frames omitted
Wrapped by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myService': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.proxiedSessionEventBus': Scope 'vaadin-session' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No VaadinSession bound to current thread
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834) ~[spring-context-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.2.1.RELEASE.jar:4.2.1.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:667) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:342) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:273) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:980) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:969) [spring-boot-1.3.0.M5.jar:1.3.0.M5]
    at MyApplication.main(MyApplication.java:34) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:435) [spring-boot-maven-plugin-1.3.0.M5.jar:1.3.0.M5]