[jboss-user] [JBoss Seam] - How can I get the session id?

[chicochen]

I use below code, but FacesContext.getCurrentInstance() always return null.


  | FacesContext facesContext = FacesContext.getCurrentInstance();
  | 			ExternalContext externalContext = facesContext.getExternalContext();
  | 			HttpSession session = (HttpSession)externalContext.getSession(true); 
  | 			String sessionId = session.getId();	 


package com.eastidea.menglishweb.action;
  | 
  | import javax.faces.context.ExternalContext;
  | import javax.faces.context.FacesContext;
  | import javax.persistence.EntityManager;
  | import javax.persistence.NoResultException;
  | import javax.servlet.http.HttpSession;
  | 
  | import org.jboss.seam.annotations.In;
  | import org.jboss.seam.annotations.Name;
  | import org.jboss.seam.security.Identity;
  | 
  | import com.eastidea.menglishweb.action.base.BaseActionImpl;
  | import com.eastidea.menglishweb.entity.User;
  | 
  | @Name("authenticateAction")
  | public class AuthenticateActionImpl extends BaseActionImpl implements
  | 		AuthenticateAction {
  | 
  | 	private static final long serialVersionUID = 7601102159656515184L;
  | 
  | 	@In
  | 	private EntityManager entityManager;
  | 
  | 	@In
  | 	private Identity identity;
  | 
  | 	public boolean authenticate() {
  | 		try {
  | 			User user = (User) entityManager
  | 					.createQuery(
  | 							"from User where username = :username and password = :password")
  | 					.setParameter("username", identity.getUsername())
  | 					.setParameter("password", identity.getPassword())
  | 					.getSingleResult();
  | 			setCurrentUser(user);
  | 			
  | 			FacesContext facesContext = FacesContext.getCurrentInstance();
  | 			ExternalContext externalContext = facesContext.getExternalContext();
  | 			HttpSession session = (HttpSession)externalContext.getSession(true); 
  | 			String sessionId = session.getId();			
  | 			
  | 			return true;
  | 		} catch (NoResultException ex) {
  | 			return false;
  | 		}
  | 	}
  | }
  | 

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