public boolean isDjpDisconnected() {
    CompletableFuture<String> timeStamp = djpService.getTimeStamp();

    try {
        return timeStamp.get(3, TimeUnit.SECONDS).isEmpty();
    } catch (InterruptedException | ExecutionException | TimeoutException e) {
        log.warn("DJP connection can't be established", e.getCause());
      // dari sonar saranin handlenya gini
      // Thread.currentThread().interrupt();
      // tapi masalahnya exceptionnya itu kena di async thread punya si completableFuture,
      // bukan di thread yang manggil method isDjpDisconnected() ini
      // si async thread completableFuture jadinya masih di interruptedException, alias ngegantung gitu
      // ga pernah masuk ke .handle() maupun .whenComplete()
        return true;
    }
}


@Override
public CompletableFuture<String> getTimeStamp() {

    return CompletableFuture
        .supplyAsync(() -> postRequest(
            djpGatewayConfig.getTimestampPath(),
            null,
            String.class
        ), taskExecutor)
      // ga masuk ke handle() sini waktu 3 exception di atas kejadian
        .handle(mappingError("getTimeStamp"));
}