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Archive for December, 2009

Why I Hate Weblogic Integration

December 22, 2009 1 comment

This is a running post, as i go along with my current task of trying to use WLI i’m pretty sure i will be adding items to this list:

  • WorkShop – What a bloated and buggy piece of crap. This is probably the worst part till now.
    • I guess its too much to ask for a software to give reasons for not working but eh, here are some i have found:
      • Don’t put your workspace on a path with spaces or strange letters(like ó)
      • If trying to create to create a task plan workshop refuses to responde to next your trying to create the plan in the wrong folder
  • Transformations – grrrrrr… trying to debug these things is the worst thing i’ve had to do. want to know why? because i can’t…
  • It’s really hard to understand why we should even use this crap, and why do people around the world actually consider this as added value….
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Extending EJB3 Objects

December 2, 2009 Leave a comment

Small and fast tip.

In order to be able to extend an EJB Entity object (be it a main object or a primary key embbedable) you need to write the MappedSuperclass anotation in the super class.

The following is taken from hibernate documentation :

@MappedSuperclass
public class BaseEntity {
    @Basic
    @Temporal(TemporalType.TIMESTAMP)
    public Date getLastUpdate() { ... }
    public String getLastUpdater() { ... }
    ...
}

@Entity class Order extends BaseEntity {
    @Id public Integer getId() { ... }
    ...
}

Some other notes taken from the documentation :

  • Properties from superclasses not mapped as @MappedSuperclass are ignored;
  • The access type (field or methods), is inherited from the root entity, unless you use the Hibernate annotation @AccessType;
  • Any class in the hierarchy non annotated with @MappedSuperclass nor @Entity will be ignored.

Read the documentation to understand it fully : http://docs.jboss.org/hibernate/stable/annotations/reference/en/html/entity.html chapter 2.2.4.4

Please note that even though i’ve used the Hibernate documentation as a reference this anotation also exists in javax.persistence so it can be used with JPA

Categories: ejb3, java Tags: , ,