带有限定符@Default的ZZZZ类型的不满意依赖项

Question

我有豆子如下所示。

@Singleton
@DependsOn("DefaultEmailService")
public class CustomerService implements UserHandlingService {

    private DefaultEmailService mailService;

    @Inject
    public CustomerService(DefaultEmailService mailService) {       
        this.mailService = mailService;
    }
}


@Singleton
@Startup
public class DefaultEmailService implements EmailService {

    public DefaultEmailService() {  
    }
}

我得到的错误就像

Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type DefaultEmailService with qualifiers @Default
  at injection point [BackedAnnotatedParameter] Parameter 1 of [BackedAnnotatedConstructor] @Inject public com.project.service.CustomerService(DefaultEmailService)
  at com.project.service.CustomerService.<init>(CustomerService.java:0)

我做错什么了吗。

Answer 1

问题在于@Singleton注释，即来自javax的注释。ejb而不是javax。注入。使用ejb one并将bean在CDI上下文上注册的接口定义为接口，而不是实现，更改代码：

@Inject
public CustomerService(EmailService mailService) {
    this.mailService = (DefaultEmailService) mailService;
}