这可能是微不足道的，但我似乎一直在墙上跑，却找不到我的错误。
我正在扩展使用Spring和OpenJPA的Apache James 3邮件服务器。我现在想要访问一个通过JMX使用JPA Repository的Service类。
服务是
@Component
@ManagedResource(objectName = "bean:name=BlacklistServiceImpl", description = "The service providing access to the blacklisted recipients in the DB.")
public class BlacklistServiceImpl implements BlacklistService {
@Autowired
private BlackListRepository blackListRepository;
@Autowired
private ConversationService conversationService;
@Override
@ManagedOperation(description = "Add address to blacklist")
@ManagedOperationParameter(name = "address", description = "Address to add to blacklist.")
public void addAddress(String address) {
//Stuff
}
@Override
@ManagedOperation(description = "Remove address from blacklist")
@ManagedOperationParameter(name = "address", description = "Address to remove from blacklist.")
public void removeAddress(String address) {
//Stuff
}
}
我已经添加到以下内容中：
<bean id="mailserverBeansExporter" class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter">
<property name="beans">
<map>
<entry key="bean:name=BlacklistServiceImpl">
<bean class="<snip>.services.blacklist.impl.BlacklistServiceImpl"/>
</entry>
</map>
</property>
</bean>
虽然我已经设法构建了这个，但James在启动时崩溃，但有以下异常：
[INFO] Starting Apache James Server...
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error creating bean with name 'blacklistServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.B
eanCreationException: Could not autowire field: private <snip>.core.repositories.blacklist.BlackListRepository <snip>.service
s.blacklist.impl.BlacklistServiceImpl.blackListRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean
of type [<snip>.repositories.blacklist.BlackListRepository] found for dependency: expected at least 1 bean which qualifies as autowire cand
idate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'blacklistServiceImpl': Injection of autowired dependencies failed; neste
d exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private <snip>.repositories.blacklist.Blac
kListRepository <snip>.services.blacklist.impl.BlacklistServiceImpl.blackListRepository; nested exception is org.springframework.beans.facto
ry.NoSuchBeanDefinitionException: No matching bean of type [<snip>.repositories.blacklist.BlackListRepository] found for dependency: expecte
d at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(re
quired=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java
:285)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private <snip>.repositories.blacklist.BlackLis
tRepository <snip>.services.blacklist.impl.BlacklistServiceImpl.blackListRepository; nested exception is org.springframework.beans.factory.N
oSuchBeanDefinitionException: No matching bean of type [<snip>.repositories.blacklist.BlackListRepository] found for dependency: expected at
least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(requir
ed=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.j
ava:502)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java
:282)
... 33 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [<snip>.repositories.blacklist.BlackLis
tRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframe
work.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:920)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:789)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:703)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.j
ava:474)
... 35 more
BlackListRepository有两个实现：JPABlackListRepository和InMemoryBlackListRepository，用于单元测试。我尝试通过添加
来解决问题<bean id="BlackListRepository" class="<snip>.JPABlackListRepository" />
到公共上下文，但这导致单元测试失败，因为现在内存实现已不再使用了。
我将不胜感激。
更新
在调试时（感谢下面的评论）我意识到只删除@Component和@ Managed *注释以及
部分<bean id="mailserverBeansExporter" class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter">
<property name="beans">
<map>
<entry key="bean:name=BlacklistServiceImpl">
<bean class="at.willhaben.safe.sms.core.services.blacklist.impl.BlacklistServiceImpl"/>
</entry>
</map>
</property>
</bean>
导致干净的启动。显然，JMX不起作用，但在代码中留下任何这些语句都会导致上述异常。
答案 0 :(得分：2)
就像其他评论所指出的那样，异常与JMX并没有真正的关系 - 问题似乎是没有找到依赖。
您已经提到当您以这种方式明确传入存储库时：
<bean id="BlackListRepository" class="<snip>.JPABlackListRepository" />
然后它可以工作，如果是这样的话，你可以选择性地覆盖它以单独进行测试，创建一个测试应用程序上下文：
test-applicationcontext.xml
<import resource="prod-context.xml"/>
<bean id="BlackListRepository" class="..InMemoryBlackListRepository"/>
这将确保InMemoryBlackLIstRespository是注入的。
还要通过Jmx公开服务bean：
<bean name="blacklistService" class="..BlackListServiceImpl"/>
<bean id="mailserverBeansExporter" class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter">
<property name="beans">
<map>
<entry key="bean:name=BlacklistServiceImpl" value-ref="blacklistService">
</entry>
</map>
</property>