12.2.2. Seam component
You can write Seam components in Groovy exactly as you would in Java: annotations mark classes as Seam components.
Example 12.2. Writing Seam Components in Groovy
@Scope(ScopeType.SESSION) @Name("bookingList") class BookingListAction implements Serializable { @In EntityManager em @In User user @DataModel List<Booking> bookings @DataModelSelection Booking booking @Logger Log log @Factory public void getBookings() { bookings = em.createQuery(''' select b from Booking b where b.user.username = :username order by b.checkinDate'''). setParameter("username", user.username). getResultList() } public void cancel() { log.info("Cancel booking: #{bookingList.booking.id} for #{user.username}") Booking cancelled = em.find(Booking.class, booking.id) if (cancelled != null) em.remove( cancelled ) getBookings() FacesMessages.instance().add("Booking cancelled for confirmation number #{bookingList.booking.id}", new Object[0]) } }