hey, I meet a problem when using this code ```val ...

# kotlinx-datetime

[kurt_steiner]

hey, I meet a problem when using this code

val CURRENT_TIME_ZONE = TimeZone.currentSystemDefault()
fun now() = Clock.System.now().toLocalDateTime(CURRENT_TIME_ZONE).toInstant(TimeZone.UTC)

my timezone is asia/shanghai, and the test code is

fun `test now instant`() {
        val nowInstant = now()
        println(nowInstant)
        println(CURRENT_TIME_ZONE)
    }

the result is

2023-11-23T20:50:06.707128450Z
Asia/Shanghai

it is ok, but when using this now in the application, everything goes wrong
how can I fix it ?

[Klitos Kyriacou]

How is it wrong? The log produced at 04:00:00.006 UTC shows a time (presumably produced by now()) of 04:00:00.003016035 UTC. That looks right to me. The fact that your Windows task bar shows "8:45" means that you looked at the log 45 minutes later.

[kurt_steiner]

I have to tell you, the time in logger is not correct, the log shows 04:00 but the system time is "8:45pm" at the same time

[Klitos Kyriacou]

I'm not sure why it's not working, but your code doesn't look correct. You seem to be mixing local times and instants. An Instant is an absolute, timezone-independent point in time. Any particular value of Instant represents the same point in time, occurring simultaneously, at all places on the planet. By defining now() as Clock.System.now().toLocalDateTime(CURRENT_TIME_ZONE).toInstant(TimeZone.UTC), you seem to be using an Instant to present local time. If you want local time, use LocalTime (drop the toInstant from your function body).

[kurt_steiner]

but how can I use the LocalTime as now(), can you give me an example ?

[kurt_steiner]

by the way, there is also the problem about @Schedule, I have change the code into

@Scheduled(cron = "0 0 4 * * *", zone = "Asia/Shanghai")
    fun refreshTasks() {
        <http://logger.info|logger.info>("refresh tasks at ${now()}")
        dailyAttendanceService.refreshDataDaily()
    }

so I can't set the zone as system default timezone, is there any way to fix it ?

[Klitos Kyriacou]

fun now(): LocalDateTime = Clock.System.now().toLocalDateTime(CURRENT_TIME_ZONE)
Then your log message will show 000400 as the local time.

[kurt_steiner]

ok, thank you