a simple cron-like job scheduling library for Rust
Be sure to add the rcron crate to your Cargo.toml:
[dependencies]
rcron = "1.2.3"Creating a schedule for a job is done using the FromStr impl for the
Schedule type of the cron library.
The scheduling format is as follows:
sec min hour day of month month day of week year
* * * * * * *
Time is for Local your local timezone.
Comma separated values such as 5,8,10 represent more than one time value. So
for example, a schedule of 0 2,14,26 * * * * would execute on the 2nd, 14th,
and 26th minute of every hour.
Ranges can be specified with a dash. A schedule of 0 0 * 5-10 * * would
execute once per hour but only on day 5 through 10 of the month.
Day of the week can be specified as an abbreviation or the full name. A
schedule of 0 0 6 * * Sun,Sat would execute at 6am on Sunday and Saturday.
A simple usage example:
use rcron::{JobScheduler, Job};
use std::time::Duration;
fn main() {
let mut sched = JobScheduler::new();
sched.add(Job::new("1/10 * * * * *".parse().unwrap(), || {
println!("exec task every 10 seconds!");
}));
sched.add(Job::new("1/5 * * * * *".parse().unwrap(), || {
println!("exec task every 5 seconds!");
}));
loop {
sched.tick();
std::thread::sleep(Duration::from_millis(500));
// Or use the following method.
// The `time_till_next_job` method returns the duration till the next job is supposed to run.
// std::thread::sleep(sched.time_till_next_job());
}
}cargo run --package rcron --example rcron_basic
Finished dev [unoptimized + debuginfo] target(s) in 0.09s
Running `target/debug/examples/rcron_basic`
exec task every 10 seconds!
exec task every 5 seconds!
exec task every 5 seconds!
exec task every 10 seconds!
exec task every 5 seconds!
exec task every 5 seconds!
exec task every 10 seconds!
exec task every 5 seconds!
exec task every 5 seconds!- cron the cron expression parser we use.
- schedule-rs is a similar rust library that implements it's own cron expression parser.
- tokio-cron-scheduler Schedule tasks on Tokio using cron-like annotation.
rcron is licensed under either of
- MIT license