# Six Essential Java EE 6 Annotations - Sufficient For CRUD

From presentation to backend:

@Model: (=@RequestScoped + @Named) directly exposes the backing bean into JSF 2 (or JSP)
@Stateless: declares a POJO as Stateless Session Bean. You will need at least one boundary to manage transactions conveniently.
@Inject: injects application "components" ("POJOs", Managed Beans, EJBs) 
@PersistenceContext: injects the EntityManager
@Entity (and @Id to denote a PK): make a class persistent


The annotations above are sufficient to start with Java EE 6 and implement a CRUD webapplication with JSR 2, EJB 3.1, CDI, JPA 2.