How do I make a Rust duration in hours without calculating it myself?

Question

I using this code to do an interval in rust:

use std::time::Duration; use tokio::time; #[tokio::main] async fn main() { let mut interval = time::interval(Duration::from_millis(10000)); loop { interval.tick().await; println!("{}","trigger") } }

When I want to set the interval to 1 hour, I have to write the Duration like this 1000 * 60 * 60. is there any simple way just like Duration::hours(1)? I have tried chrono but seems it is not compatible with Tokio.

Hello, Duration::from_secs() exist or you can implement your solution inspired by the source doc.rust-lang.org/stable/src/core/time.rs.html#210 — Zeppi
– Zeppi, Commented Jul 22, 2022 at 12:27
There is from_secs which only requires 60 * 60, or you can use chrono and chrono::Duration::to_std to make it compatible with tokio::time::interval. — Jmb
– Jmb, Commented Jul 22, 2022 at 12:28

snylonue · Accepted Answer · 2022-07-23 01:48:08Z

You can use an extension trait to implement hours() on Duration

use std::time::Duration; use tokio::time; trait DurationExt { fn from_hours(hours: u64) -> Duration; } impl DurationExt for Duration { fn from_hours(hours: u64) -> Duration { Duration::from_secs(hours * 60 * 60) } } #[tokio::main] async fn main() { let mut interval = time::interval(Duration::from_hours(1)); loop { interval.tick().await; println!("{}","trigger") } }

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