Examples for Chapter 7 - RESTful Java with JAX-RS 2.0 - page 293

Chapter 22. Examples for Chapter 7

In Chapter 7 , you learned how to create complex responses using the Response and Respon-
seBuilder classes. You also learned how to map thrown exceptions to a Response using a
javax.ws.rs.ext.ExceptionMapper . Since most of our examples use a Response object in
one way or another, this chapter focuses only on writing an ExceptionMapper .

Example ex07_1: ExceptionMapper

This example is a slight modification from ex06_1 to show you how you can use Excep-
tionMappers . Let's take a look at the CustomerResource class to see what is different:
src/main/java/com/restfully/shop/services/CustomerResource.java

@Path ( "/customers" )
public public class class CustomerResource CustomerResource {

...

@GET
@Path ( "{id}" )
@Produces ( "application/xml" )
public public Customer getCustomer ( @PathParam ( "id" ) int int id )

{

Customer customer = customerDB . get ( id );
iif ( customer == null

null )

{

throw new CustomerNotFoundException ( "Could not find customer "
+ id );

}
return return customer ;

}

@PUT
@Path ( "{id}" )
@Consumes ( "application/xml" )
public public void void updateCustomer ( @PathParam ( "id" ) int int id ,

Customer update )

{

Customer current = customerDB . get ( id );
if ( current == null )
throw new CustomerNotFoundException ( "Could not find customer " + id );

current . setFirstName ( update . getFirstName ());