@Get
	public Intervention read() {

		Intervention target = null;

		String userKey = (String) getRequest().getAttributes().get("userid");
		String interventionKey = (String) getRequest().getAttributes().get(
				"interventionid");

		if (userKey == null || interventionKey == null)
			return null;

		EntityManager em = emf.createEntityManager();
		try {

			long userId = Long.valueOf(userKey);
			long interventionId = Long.valueOf(interventionKey);

			User user = em.find(User.class, userId);

			if (user != null) {
				for (Intervention intervention : user.getIntervention()) {
					if (intervention.getIdFromKey() == interventionId) {

						target = intervention;
						break;
					}
				}
			}

		} catch (Exception e) {
			System.out.println(e);
		} finally {
			//em.close();
		}

		return target;
	}