![](/img/trans.png)
[英]No bean is eligible for injection to the injection point[JSR-365 5.2.2]
[英]No bean is eligible for injection to the injection point [JSR-299 §5.2.1]
我想注入默认的Java记录器。 然而,Eclipse强调它并指出“没有bean有资格注入注射点[JSR-299§5.2.1]”
如果我仍然部署,则抛出以下异常。 为什么它无法注入Java Logger? 对于EntityManager也是如此,但对于我自己的UserRepository Bean则不行。
org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied dependencies for type [Logger] with qualifiers [@Default] at injection point [[field]
码:
import java.util.logging.Logger;
import javax.ejb.Stateless;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import com.terry.webapp.data.UserRepository;
import com.terry.webapp.model.usermgmt.User;
// The @Stateless annotation eliminates the need for manual transaction demarcation
@Stateless
public class LoginService {
@Inject
private Logger log;
@Inject
private EntityManager em;
@Inject
private UserRepository repository;
public User login(User user) {
log.info("login " + user.getUsername());
User rUser = repository.findByCredentials(user.getUsername(), user.getPassword());
return rUser;
}
}
要注入一个记录器,你需要一个生成器方法,它给出了一个可以注入的Logger
。
import java.util.logging.Logger;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.InjectionPoint;
public class LoggerProduer {
@Produces
public Logger produceLog(InjectionPoint injectionPoint) {
return Logger.getLogger(injectionPoint.getMember().getDeclaringClass()
.getName());
}
}
并且需要使用@PersistenceContext(unitName="pscontext")
注入EntityManager
,因为它是使用persistence.xml
数据创建的,因此您的EntityManager
必须是
@PersistenceContex(unitName="pscontext")
private EntityManager em;
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.