Examples for Chapter 12 - RESTful Java with JAX-RS 2.0 - page 320

the HTTP response with a max age of 500 seconds. Let's also take a look at how these
classes are registered:
src/main/java/com/restfully/shop/services/ShoppingApplication.java

@ApplicationPath ( "/services" )
public public class class ShoppingApplication ShoppingApplication extends extends Application

{

private private Set < Object > singletons = new new HashSet < Object >();

private private Set < Class <?>> classes = new new HashSet < Class <?>>();

public public ShoppingApplication ()

{

singletons . add ( new new CustomerResource ());

classes . add ( MaxAgeFeature . class );

}

@Override
public public Set < Class <?>> getClasses ()

{

return return classes ;

}

@Override
public public Set < Object > getSingletons ()

{

return return singletons ;

}

}

Notice that we only register the MaxAgeFeature class. This class handles the registration of
the CacheControlFilter if the JAX-RS method is annotated with @MaxAge .

The Client Code

The client code hasn't changed much from other examples. We first start off by creating a
Customer on the server. We then do a GET request to get the customer, checking for the
Cache-Control header generated by the CacheControlFilter on the server side:
src/test/java/com/restfully/shop/test/CustomerResourceTest.java

...

System . out . println ( "*** GET Created Customer **" );
response = client . target ( location ). request (). get ();
CacheControl cc = CacheControl . valueOf (