Storing a http session attribute in database - jsf

Question

How can I pass an injected http session attribute (see below), along with other values (informe by the user) and save them using JPA?
The session attribute is correctly displayed and injected, but I need to pass it using the selected to be stored in the database (actually, it passess null).
The JSF:
<p:outputLabel value="UserID (the sessionAttribute):" for="userID" />
<p:inputText id="userID" value="#{userBean.myUser.xChave}" title="userID" />
<p:outputLabel value="Type the Reason:" for="reason" />
<p:inputText id="reason" value="#{viagensController.selected.reason}" />
<!-- updated (just the call to the action method: -->
<p:commandButton actionListener="#{viagensController.saveNew}" value="#{viagensBundle.Save}" update="display,:ViagensListForm:datalist,:growl" oncomplete="handleSubmit(xhr,status,args,ViagensCreateDialog);" />
The bean:
import java.io.Serializable;
import javax.annotation.PostConstruct;
import javax.enterprise.context.SessionScoped;
import javax.faces.context.FacesContext;
import javax.inject.Named;
#Named(value = "userBean")
#SessionScoped
public class UserBean implements Serializable {
private bean_login myUser;
public bean_login getMyUser() {
return myUser;
}
public void setMyUser(bean_login myUser) {
this.myUser = myUser;
}
#PostConstruct
public void init() {
String uid = FacesContext.getCurrentInstance().getExternalContext().getSessionMap().get("xChave").toString();
myUser = new bean_login();
myUser.setxChave(uid);
System.out.print("from init:" + myUser.toString());
}
}
The AbstractFacade:
public abstract class AbstractFacade<T> {
private Class<T> entityClass;
public AbstractFacade(Class<T> entityClass) {
this.entityClass = entityClass;
}
protected abstract EntityManager getEntityManager();
public void create(T entity) {
getEntityManager().persist(entity);
}
public void edit(T entity) {
getEntityManager().merge(entity);
}
public void remove(T entity) {
getEntityManager().remove(getEntityManager().merge(entity));
}
public T find(Object id) {{ /*impl. ommited*/ }
public List<T> findAll() {{ /*impl. ommited*/ }
public List<T> findRange(int[] range) { /*impl. ommited*/ }
public int count() { /*impl. ommited*/ }
}
The AbstractController (for the selected in JSF above and other methods):
public abstract class AbstractController<T> {
#Inject
private AbstractFacade<T> ejbFacade;
private Class<T> itemClass;
private T selected;
private Collection<T> items;
private enum PersistAction {
CREATE,
DELETE,
UPDATE
}
public AbstractController() {
}
public AbstractController(Class<T> itemClass) {
this.itemClass = itemClass;
}
public T getSelected() {
return selected;
}
// Pass in the currently selected item
public void setSelected(T selected) {
this.selected = selected;
}
protected void setEmbeddableKeys() {
}
protected void initializeEmbeddableKey() {
}
public Collection<T> getItems() {
if (items == null) {
items = this.ejbFacade.findAll();
}
return items;
}
// Pass in collection of items
public void setItems(Collection<T> items) {
this.items = items;
}
// Apply changes to an existing item to the data layer.
public void save(ActionEvent event) {
String msg = ResourceBundle.getBundle("/viagensBundle").getString(itemClass.getSimpleName() + "Updated");
persist(PersistAction.UPDATE, msg);
}
// Store a new item in the data layer.
public void saveNew(ActionEvent event) {
String msg = ResourceBundle.getBundle("/viagensBundle").getString(itemClass.getSimpleName() + "Created");
persist(PersistAction.CREATE, msg);
if (!isValidationFailed()) {
items = null; // Invalidate list of items to trigger re-query.
}
}
public void delete(ActionEvent event) {/*implementations ommited*/ }
private void persist(PersistAction persistAction, String successMessage) {
if (selected != null) {
this.setEmbeddableKeys();
try {
if (persistAction != PersistAction.DELETE) {
this.ejbFacade.edit(selected);
} else {
this.ejbFacade.remove(selected);
}
JsfUtil.addSuccessMessage(successMessage);
} catch (EJBException ex) {
String msg = "";
Throwable cause = JsfUtil.getRootCause(ex.getCause());
if (cause != null) {
if (cause instanceof ConstraintViolationException) {
ConstraintViolationException excp = (ConstraintViolationException) cause;
for (ConstraintViolation s : excp.getConstraintViolations()) {
JsfUtil.addErrorMessage(s.getMessage());
}
} else {
msg = cause.getLocalizedMessage();
if (msg.length() > 0) {
JsfUtil.addErrorMessage(msg);
} else {
JsfUtil.addErrorMessage(ex, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
}
}
}
} catch (Exception ex) {
Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, null, ex);
JsfUtil.addErrorMessage(ex, ResourceBundle.getBundle("/viagensBundle").getString("PersistenceErrorOccured"));
}
}
}
// Creates a new instance of an underlying entity and assigns it to Selected property.
public T prepareCreate(ActionEvent event) {
T newItem;
try {
newItem = itemClass.newInstance();
this.selected = newItem;
initializeEmbeddableKey();
return newItem;
} catch (InstantiationException ex) {
Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, null, ex);
}
return null;
}
// Inform the user interface whether any validation error exist on a page.
public boolean isValidationFailed() {
return JsfUtil.isValidationFailed();
}
// Retrieve all messages as a String to be displayed on the page.
public String getComponentMessages(String clientComponent, String defaultMessage) {
return JsfUtil.getComponentMessages(clientComponent, defaultMessage);
}
}
Thanks in advance.
updated:
The ViagensController:
#Named(value = "viagensController")
#ViewScoped
public class ViagensController extends AbstractController<Viagens> implements Serializable {
//generics:passing JPA Entity class, where the 'reason' in JSF is defined
public ViagensController() {
super(Viagens.class);
}
}

Answer 1

Need to override the save method passing the injected http session value :
#ManagedBean(name = "riscosController")
#ViewScoped
public class RiscosController extends AbstractController<Riscos> {
#EJB
private RiscosFacade ejbFacade;
#Inject
#SessionChave
private String iSessionChave;
private String sessionChave;
private UorPosController matriculaController;
private UorPosController informanteController;
public String getSessionChave(String chave) {
if (sessionChave.isEmpty()) {
sessionChave = iSessionChave;
}
return sessionChave;
}
public void setSessionChave(String sessionChave) {
this.sessionChave = sessionChave;
}
#PostConstruct
#Override
public void init() {
super.setFacade(ejbFacade);
FacesContext context = FacesContext.getCurrentInstance();
matriculaController = context.getApplication().evaluateExpressionGet(context, "#{uorPosController}", UorPosController.class);
informanteController = context.getApplication().evaluateExpressionGet(context, "#{uorPosController}", UorPosController.class);
sessionChave = "";
}
#Override
public void saveNew(ActionEvent event) {
this.getSelected().setObs(this.getSessionChave(sessionChave));
super.saveNew(event);
}
}