我有如下所示的豆子。
@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() {
}
}
我收到类似的错误
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)
我做错了什么吗?
最佳答案
问题是@Singleton
批注,它来自javax.ejb
而不是javax.inject
。使用ejb一个并定义接口,您的bean在CDI上下文中注册为接口,而不是实现,请更改您的代码:
@Inject
public CustomerService(EmailService mailService) {
this.mailService = (DefaultEmailService) mailService;
}