gistfile1.java

@Component
@ApplicationScoped
public class DataStoreTemplateImpl implements DataStoreTemplate {

    private static final Class<?>[] models = new Class<?>[] {
        User.class,
        Item.class,
        Car.class,
        Another.class
    };
	
    static {
        for (Class<?> m : models)
	    ObjectifyService.register(m);
    }

    private final Objectify ofy;
    private final AsyncObjectify ofyAsync;
	
    public DataStoreTemplateImpl() {
        this.ofy = ObjectifyService.begin();
        this.ofyAsync = this.ofy.async();
    }

    @Override
    public <T> Key<T> save(T obj) {
	return ofy.put(obj);
    }
    
    @Override
    public <T> void saveAsync(T obj) {
	ofyAsync.put(obj);
    }
    
    /* ... */
	
}