I am developing an application with JSF and EJB 3.0.
Now I have got a question where I should implement methods that manipulate my
objects.
Example1: The EJB SessioBean only implements methods to get data from the
database and to persist or merge objects:
EJB SessionBean courseHandler
public void createCourse(Course course){
| em.persist(course);
| }
The managedBean courseBean manipulates the object:
managedBean JSF courseBean
| public void joinCourse(){
| currentUser =
userHandler.getCmtUserByUserName(getRemoteUserName());
| currentCourse.getParticipants().add(currentUser);
| currentUser.getCourses().add(currentCourse);
| courseHandler.updateCourse(currentCourse);
| CustomMessage.createMessage("course_joined");
| }
Or should example 2 be the better version:
The EJB SessionBean courseHandler manipulates the object and persists/merges it:
public void joinCourse(CmtUser user, Course course){
| course.getParticipants().add(user);
| user.getCourses().add(course);
| em.merge(course);
| }
managedBean JSF courseBean
public void joinCourse(){
| currentUser =
userHandler.getCmtUserByUserName(getRemoteUserName());
| courseHandler.joinCourse(currentUser,currentCourse)
| CustomMessage.createMessage("course_joined");
| }
Thank you for your answers!
NSchweig
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