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denoland-deno/ext/cron/time.rs
Igor Zinkovsky 01d3e0f317
feat(cron) implement Deno.cron() (#21019)
This PR adds unstable `Deno.cron` API to trigger execution of cron jobs.

* State: All cron state is in memory. Cron jobs are scheduled according
to the cron schedule expression and the current time. No state is
persisted to disk.
* Time zone: Cron expressions specify time in UTC.
* Overlapping executions: not permitted. If the next scheduled execution
time occurs while the same cron job is still executing, the scheduled
execution is skipped.
* Retries: failed jobs are automatically retried until they succeed or
until retry threshold is reached. Retry policy can be optionally
specified using `options.backoffSchedule`.
2023-11-01 11:57:55 -07:00

19 lines
704 B
Rust

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
/// Identical to chrono::Utc::now() but without the system "clock"
/// feature flag.
///
/// The "clock" feature flag pulls in the "iana-time-zone" crate
/// which links to macOS's "CoreFoundation" framework which increases
/// startup time for the CLI.
pub fn utc_now() -> chrono::DateTime<chrono::Utc> {
let now = std::time::SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.expect("system time before Unix epoch");
let naive = chrono::NaiveDateTime::from_timestamp_opt(
now.as_secs() as i64,
now.subsec_nanos(),
)
.unwrap();
chrono::DateTime::from_naive_utc_and_offset(naive, chrono::Utc)
}