gistfile1.java

if (request.getParameter("addBroadcast") != null) {
            User u = Authenticator.authenticate(request);
            Gson gson = new Gson();
            response.setCharacterEncoding("utf8");
            if (u == null) {
                response.getWriter().write("Denied");
            } else {
                if (u.getUserRole() != UserRole.GROUP_MONITOR) {
                    response.getWriter().write("Not available");
                    return;
                }
                ScheduleBroadcastDao dao = ContextDao.get(ScheduleBroadcastDao.class);
                StudentDao studentDao = ContextDao.get(StudentDao.class);

                ScheduleBroadcast broadcast = new ScheduleBroadcast();
                broadcast.setText(request.getParameter("text"));
                broadcast.setExpires(new Date(Long.parseLong(request.getParameter("expires"))));
                broadcast.setGroupList(new String[]{studentDao.getByUser(u).getGroupNumber()});
                dao.create(broadcast);
                response.getWriter().write("OK");
            }
        }