Examples for Chapter 15 - RESTful Java with JAX-RS 2.0 - page 356

A user will now only be able to invoke the updateCustomer() method once per day.

The last thing we have to do is initialize our deployment. Our Application class needs to
change a little bit to enable this:
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 >();

public public ShoppingApplication ()

{

singletons . add ( new new CustomerResource ());

HashMap < String , String > userSecretMap = new new HashMap < String , String >();

userSecretMap . put ( "bburke" , "geheim" );
singletons . add ( new new OneTimePasswordAuthenticator ( userSecretMap ));

singletons . add ( new

new PerDayAuthorizer ());

}

@Override
public public Set < Object > getSingletons ()

{

return return singletons ;

}

}

The ShoppingApplication class populates the user-secret map that must be used to con-
struct the singleton OneTimePasswordAuthenticator instance. The PerDayAuthorizer
class is also a singleton and instantiated by this constructor.

The client code

The first thing we do on the client side is to implement a ClientRequestFilter that sets up
the Authorization header that will be sent to the server:
src/main/java/com/restfully/shop/features/OneTimePasswordGenerator.java

public public class class OneTimePasswordGenerator OneTimePasswordGenerator implements implements ClientRequestFilter

{

protected protected String user ;

protected

protected String secret ;

public public OneTimePasswordGenerator ( String user , String secret )

{

this this . user = user ;