Learn Java for Web Development

CHAPTER 8: Play with Java and Scala 375

11. public static Result newBook() {


12. return TODO;


13. }


14. 
    


15. public static Result deleteBook(Long id) {


16. return TODO;


17. }


18. 
    


19. }

   Lines 7, 11, and 15: These lines show the actions that were specified in the

routes file in Listing 8-7.

   Lines 8, 12, and 16: A built-in result TODO is used that returns “Not

implemented” response 503. This result tells Play 2 that the action

implementations will be provided later. When you access the application via

http://localhost:9000/books, you see the result displayed in Figure 8-22.

Figure 8-22. Built-in TODO result in Play 2

Creating the Model

The next step is to define the model Book that can be stored in a relational database. For this, create
a class in the app/models/Book.java file, as illustrated in the Listing 8-9.

Listing 8-9. Book.java

1. package models;


2. import java.util.*;


3. public class Book {


4. public Long id;


5. public String label;


6. public static List all() {


7. return new ArrayList();