我确实遇到了与此处所述相同的问题:JBoss7.1.3: @EJB works while @Inject fails 据推测,这甚至是相同的设置(Wildfly 8.0)。
尽管有一个带有生产者的Resource类,但我无法注入一个Logger实例。在Controller中Neiter,也不在EJB中。 [问题1]如果我错了,请纠正我,我应该能够将它们注入@Model bean并注入使用@Stateless(EJB)注释的bean,不应该吗?
package com.doe.webapp.service.auxilliary.cdiproducer;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.faces.context.FacesContext;
import org.apache.log4j.Logger;
@Dependent
public class Resources {
@Produces
public Logger produceLog(InjectionPoint injectionPoint) {
return Logger.getLogger(injectionPoint.getMember().getDeclaringClass().getName());
}
@Produces
@RequestScoped
public FacesContext produceFacesContext() {
return FacesContext.getCurrentInstance();
}
}
这是我的控制器的开始:
package com.doe.webapp.controller.security;
import java.io.IOException;
import java.util.Map;
import javax.annotation.PostConstruct;
import javax.enterprise.inject.Model;
import javax.enterprise.inject.Produces;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedProperty;
import javax.faces.context.FacesContext;
import javax.inject.Inject;
import javax.inject.Named;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.constraints.Pattern;
import org.slf4j.Logger;
import com.doe.webapp.model.usermgmt.User;
import com.doe.webapp.service.security.LoginService;
@Model
public class LoginController {
private static final String ADMIN = "admin";
@Inject
private Logger log;
@Inject
private FacesContext facesContext;
@Inject
private LoginService loginService;
[...]
这是EJB,它也是@Model注释类中的Injected。同样是记录器。虽然前者工作,但Logger的注入会抛出先前解释的错误。
package com.doe.webapp.service.security;
import java.util.logging.Logger;
import javax.ejb.Stateless;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import com.doe.webapp.data.UserRepository;
import com.doe.webapp.model.usermgmt.User;
@Stateless
public class LoginService {
@Inject
private transient Logger log;
@Inject
private UserRepository repository;
@Inject
private Event<User> userEvent;
public User login(User user) {
log.info("login " + user.getUsername());
User rUser = repository.findByCredentials(user.getUsername(), user.getPassword());
return rUser;
}
}
现在,我收到LoginController.java控制器的错误。
WELD-001408: Unsatisfied dependencies for type Logger with qualifiers @Default
at injection point [BackedAnnotatedField] @Inject private com.doe.webapp.controller.security.LoginController.log
at com.doe.webapp.controller.security.LoginController.log(LoginController.java:0)
另一个用于LoginService.java Enterprise Bean。
WELD-001408: Unsatisfied dependencies for type Logger with qualifiers @Default
at injection point [BackedAnnotatedField] @Inject private transient com.doe.webapp.service.security.LoginService.log
at com.doe.webapp.service.security.LoginService.log(LoginService.java:0)
<问题2:问题2:我不理解这种注入因WELD-001408错误而失败。
答案 0 :(得分:8)
我现在没有Wildfly / JBoss环境,但有一个可能的错误:
LoginService
导入并想要注入以下内容:
import java.util.logging.Logger;
...
@Inject
private transient Logger log;
LoginController
尝试使用SLF4J:
import org.slf4j.Logger;
...
@Inject
private Logger log;
虽然Resources
类使用第三种Logger
:
import org.apache.log4j.Logger;