Injecting doesn't work
Hi folks,
I've searched the forum, but I didn't find a topic solving my problem.
I modified the booking example to test the capabilities of Seam. I have to say, Seam is very nice.
As I said, I modified the booking example. I left the LoginAction as it was. After logging in, the user sees a personalized welcome message. The Name is retrieved from a database. It works fine. The User enters his token and is welcomed with his name.
A panelNavigation2 (nested in a f:view) displays some sort of navigation in the sidebar. As you see, I use myFaces. One of the navigation Items calls a method in a stateless bean, where I want the user component to be injected. But this doesn't work. Debugging this code reveals that as soon as the called method is invoked, user equals null. I don't know, what's wrong with my code. It's similar to the booking example (i.e. ChangePasswordAction).
User.java:
package myprog.entities;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.validator.Length;
import org.hibernate.validator.NotNull;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import static org.jboss.seam.ScopeType.SESSION;
@Entity
@Table(name="USERS")
@Name("user")
@Scope(SESSION)
public class User implements Serializable {
private String m_ID;
private String m_Name;
private String m_Phone;
private String m_Email;
private int m_isDeveloper;
private int m_isTester;
private Integer m_isAdmin;
private String m_Password;
private String m_TOTRoot;
private String m_PWToken;
private Integer m_isQPV;
public User(String p_id, String p_name, String p_password, String p_email, String p_phone) {
super();
m_ID = p_id;
m_Name = p_name;
m_Password = p_password;
m_Email = p_email;
m_Phone = p_phone;
}
public User() {
}
@Column(name="USR_ID")
@Id
@NotNull
@Length(min=2, max=10)
public String getID() {
return m_ID;
}
//Here follow all the needed getters and setters
}The LoginAction:
package myprog.sessions;
import java.util.List;
import javax.ejb.Interceptor;
import javax.ejb.Stateful;
import javax.ejb.Stateless;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.contexts.Context;
import org.jboss.seam.ejb.SeamInterceptor;
import myprog.entities.User;
@Stateless
@Name("login")
@Interceptor(SeamInterceptor.class)
public class LoginAction implements ILogin {
@In @Out
private User user;
@PersistenceContext(unitName="myProgDatabase")
private EntityManager em;
@In
private Context sessionContext;
@In
private FacesContext facesContext;
public String login() {
List<User> results = em.createQuery(
"from User where ID=:username")
.setParameter("username", user.getID()).getResultList();
if (results.size() == 0) {
facesContext.addMessage(null, new FacesMessage("Invalid login"));
return "login";
} else {
user = results.get(0);
sessionContext.set("loggedIn", true);
return "main";
}
}
}Here is the component with the called method:
package myprog.sessions;
import java.util.List;
import javax.ejb.Interceptor;
import javax.ejb.Stateful;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.validator.Valid;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.contexts.Context;
import org.jboss.seam.ejb.SeamInterceptor;
import myprog.entities.Testaction;
import myprog.entities.User;
@Stateless
@LoggedIn
@Name("showListForDevelopers")
@Interceptor(SeamInterceptor.class)
public class ShowListForDevelopers implements IShowListForDevelopers {
@PersistenceContext(unitName = "myProgDatabase")
private EntityManager em;
@In @Valid
private User user;
public Testaction[] getTestactions() {
List<Testaction> result = em.createQuery(
"from Testaction where DevUsrID=:dev order by ID asc"
).setParameter("dev", user.getID()).getResultList();
return result.toArray(new Testaction[result.size()]);
}
}As I said, in getTestactions() the user isn't injected. Has anybody any idea?
Might be it's important to know, that the method is called from a panelNavigation2 item. But I think, this shouldn't make any difference.
Thank you
Newlukai
