1. JPA in Vaadin CSCI 3130 Winter 2016

2. What is JPA?  Java Persistence API  Allows for “easy” storage of Java Objects  Is a type of Object Relational Mapping (ORM) framework  Book of Vaadin: https://vaadin.com/docs/- /part/framework/jpacontainer/jpacontainer- overview.htmlhttps://vaadin.com/docs/- /part/framework/jpacontainer/jpacontainer- overview.html  Java Persistence API  Allows for “easy” storage of Java Objects  Is a type of Object Relational Mapping (ORM) framework  Book of Vaadin: https://vaadin.com/docs/- /part/framework/jpacontainer/jpacontainer- overview.htmlhttps://vaadin.com/docs/- /part/framework/jpacontainer/jpacontainer- overview.html

3. How does it work? Your ObjectsYour UI JPA Database

4. How do I use it?  Carefully! 1.Update ivy.xml 2.Change Project Facet 3.Edit persistence.xml 4.Define Data Model 5.Connect JPA to UI  Carefully! 1.Update ivy.xml 2.Change Project Facet 3.Edit persistence.xml 4.Define Data Model 5.Connect JPA to UI

5. 1. Update ivy.xml

6. Update ivy.xml  Add these lines to ivy.xml:  Save and wait for the new libraries to download  Add these lines to ivy.xml:  Save and wait for the new libraries to download

7. 2. Add Project Facet

8. Add Project Facet

17. Edit Persistence.xml

18. Edit persistence.xml  persistence.xml tells JPA how to connect to the database  By default it is in src/META-INF/persistence.xml  persistence.xml tells JPA how to connect to the database  By default it is in src/META-INF/persistence.xml

19. Edit persistence.xml

25. 4. Define Data Model

26. Define Data Model  Create the classes to hold your data  Annotate data classes with @Entity  Annotate id field with @Id  Annotate relationships with @OneToMany, @ManyToOne, @ManyToMany, etc…  For reciprocal relationships, make sure to use mappedBy  Create the classes to hold your data  Annotate data classes with @Entity  Annotate id field with @Id  Annotate relationships with @OneToMany, @ManyToOne, @ManyToMany, etc…  For reciprocal relationships, make sure to use mappedBy

27. 5. Connect JPA to UI

28. Connect JPA to UI  Create a new JPAContainer.  Connect it to a Table, Form, etc.  Perform operations on the container (add, delete, update, etc)  Create a new JPAContainer.  Connect it to a Table, Form, etc.  Perform operations on the container (add, delete, update, etc)