我遇到了Spring-DM的问题,Osgi Services@Autowired了。我定义了一个Spring bean + OSGI服务,如下所示:
<bean id="my.sessionFactoryBean"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource">
<ref local="my.dataSource" />
</property>
...
</bean>
<osgi:service ref="my.sessionFactoryBean"
id="my.sessionFactory" interface="org.hibernate.SessionFactory" />
我可以从另一个捆绑包中引用此服务,而不会在 xml bean 定义中出现任何问题,如下所示:
<beans>
...
<osgi:reference id="my.sessionFactory"
interface="org.hibernate.SessionFactory" />
..
<bean id="my.databaseItemReader"
class="my.MyReader">
<property name="sessionFactory" ref="my.sessionFactory" />
...
</beans>
我的问题依赖于使用如下所示的@Autowired注释:
public abstract class AbstractHibernateDao {
@Autowired
@Qualifier(value="my.sessionFactory")
private SessionFactory sessionFactory;
...
我收到经典错误:
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.Sess
ionFactory my.AbstractHibernateDao.sessionFactory; nested exception is org.springfr
amework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [org.hibernate.SessionFactory] found for d
ependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {
@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qu
alifier(value=my.sessionFactory)}
如果我删除@Qualifier,则会收到此错误:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [org.hibernate.SessionFactory] is defined: expected single matching bean but found 2: [my.sessionFactoryBean, my.sessionFactory]
这让我觉得我在Spring bean注册表中确实有我的OSGI服务......知道我做错了什么吗?
仅供参考,我也尝试在setter上注入带有@ServiceReference的OSGI服务,但是Spring-DM从未注入它(有一些空指针异常)
只是一个猜测,但是当你使用@Autowire时,你必须在做"context:component-scan",这反过来可能会找到正在显示的其他bean(my.sessionFactoryBean)。使用 XML 注入时,可能未启用组件扫描,因此 OSGi 服务已正确解析。