Beginning EJB in Java EE 8: Building Applications with Enterprise JavaBeans

© Jonathan Wetherbee, Massimo Nardone, Chirag Rathod, and Raghu Kodali 2018

Jonathan Wetherbee, Massimo Nardone, Chirag Rathod and Raghu KodaliBeginning EJB in Java EE 8https://doi.org/10.1007/978-1-4842-3573-7_3

3. Entities and the Java Persistence API (JPA)

Jonathan Wetherbee¹ , Massimo Nardone², Chirag Rathod³ and Raghu Kodali⁴

(1)

San Mateo, California, USA

(2)

Helsinki, Finland

(3)

Jayanagar I Blk, India

(4)

Cupertino, California, USA

 

Now that you have explored how EJB provides business services through session beans, we’ll turn your attention to a different kind of component called entities , which are classes that represent tables in a database, and whose instances represent rows in those tables. Whereas session beans provide services to a client ...