code: @Override
  	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
  		if (alertingPlugin.getAlertSender() != null) {
  			JsonUtils.writeJsonToOutputStream(alertingPlugin.getAlertSender().getAvailableAlerters(),
  					resp.getOutputStream());
  		} else {
  			JsonUtils.writeJsonToOutputStream(Collections.emptyList(), resp.getOutputStream());
  		}
  	}
docs: Returns all available alerters