How do I solve the problem of SseEmitter constantly sending events? - spring

Question

How do I solve the problem of SseEmitter constantly sending events?
When subscripting from the client to the eventsource, it was expected that the result would be fetched only once.
However, contrary to expectations, the eventsource is constantly fetching subscripts.
I want to send an event using the scheduler from the server, but I can't use the scheduler because it keeps getting events automatically.
How can I manage to send events?
Rest controller.
#RestController
#RequiredArgsConstructor
public class NotificationController {
private final NotificationService notificationService;
#ResponseBody
#GetMapping(value = "/subscribe/{drawingId}", produces = "text/event-stream")
public SseEmitter subscribe() {
return notificationService.subscribe(32);
}
}
subscribe source.
public SseEmitter subscribe(Long drawingId){
Map<String, Object> paramMap = new HashMap<>();
Map<String, Object> resultMap = new HashMap<>();
List<BusStop> busStopList = busStopRepository.findByDrawingId(drawingId);
paramMap.put("serviceKey", serviceKey);
for (BusStop busStop: busStopList) {
paramMap.put("bstopid", busStop.getBstopid());
try {
String xml = getXmlByRestTemplate();
JSONObject jObject = XML.toJSONObject(xml);
ObjectMapper mapper = new ObjectMapper();
mapper.enable(SerializationFeature.INDENT_OUTPUT);
Object json = mapper.readValue(jObject.toString(), Object.class);
resultMap.put(String.valueOf(busStop.getId()), json);
}catch(NoSuchAlgorithmException | KeyManagementException | JsonProcessingException e) {
e.printStackTrace();
}
}
String time = String.valueOf(System.currentTimeMillis());
SseEmitter emitter = new SseEmitter();
try{
emitter.send(SseEmitter.event()
.id(time)
.name("busStopInfo")
.data(resultMap));
} catch (IOException e) {
throw new RuntimeException(e);
}
emitter.complete();
return emitter;
}
Script source.
eventSource.addEventListener("busStopInfo", sseResult => {
console.log(sseResult);
})
BestRegards!