CMP and JPA

[Chaminda Amarasinghe]

Hi Guys,

Can we combine CMP and JPA (use them in same time)

Regards

[Rishi Shehrawat]

It can be done, but is not recommended

[Ranganathan Kaliyur Mannar]

why would you?
in fact, in 3.0, JPA can replace CMP. If you write a EJB 2.1 BMP, you would be actually writing all the insert/update/delete query yourself. In CMP, you were required to just 'set' the values - for deleting, you would use 'remove' method. In JPA too, you create the object, 'set' the values and call 'entityManager.persist()' or 'entitymanager.remove()'. So, they are very similar...

[Chaminda Amarasinghe]

This is a question for a simulator

Regards

[Jeanne Boyarsky]

Yes. It is valid to have existing CMP code and new JPA code in the same application. This is a common migration scenario.

[Chaminda Amarasinghe]

Thanks Guys