private User getUser(UserId userId) throws UserNotFoundException {
User user = userRepository.findOne(userId.id);
if (user == null) {
throw new UserNotFoundException(format("User with this id [%d] not exists.", userId.id));
}
return user;
}
public void joinToChatRoom(Token token, UserId userId, ChatRoomId chatRoomId)
throws AuthenticationException, UserNotFoundException, ChatRoomNotFoundException {
LOG.info(format("Join user with id[%d] into chat-room with id[%d].", userId.id, chatRoomId.id));
ChatRoom chatRoom = getChatRoom(chatRoomId);
User user = getUser(userId);
user.getChatRooms().add(chatRoom);
userRepository.save(user);
LOG.info(
format(
"Joined user with id[%d] into chat-room with id[%d] was successfully.",
userId.id, chatRoomId.id));
}