@Override public void batchPoll(TaskServicePb.BatchPollRequest req, StreamObserver<TaskPb.Task> response) { final int count = GRPC_HELPER.optionalOr(req.getCount(), 1); final int timeout = GRPC_HELPER.optionalOr(req.getTimeout(), POLL_TIMEOUT_MS); if (timeout > MAX_POLL_TIMEOUT_MS) { response.onError(Status.INVALID_ARGUMENT .withDescription("longpoll timeout cannot be longer than " + MAX_POLL_TIMEOUT_MS + "ms") .asRuntimeException() ); return; } try { List<Task> polledTasks = taskService.batchPoll(req.getTaskType(), req.getWorkerId(), GRPC_HELPER.optional(req.getDomain()), count, timeout); LOGGER.info("polled tasks: "+polledTasks); polledTasks.stream().map(PROTO_MAPPER::toProto).forEach(response::onNext); response.onCompleted(); } catch (Exception e) { GRPC_HELPER.onError(response, e); } }