# cron_rs
[](https://crates.io/crates/cron_rs)
[](https://docs.rs/cron_rs)
> Cron parser and periodic jobs scheduler that are written in rust.
## USAGE
### Cron Time Format
`
MINUTE HOUR DAY MONTH WEEKDAY
`
* MINUTE (required): minute, 0-59.
* HOUR (required): hour, 0-23.
* DAY (required): day of month, 1-31.
* MONTH (required): month of year, 1-12.
* WEEKDAY (required): day of week, 0-6.
### Installation
In Cargo.toml:
```toml
[dependencies]
cron_rs = "*"
```
#### Good Example: Cron Time Format (Intervals)
```
*/2 1-8,11 * * *
````
### A Full Example
Scheduler is a cron time shceduler.
The example below will show you:
* Parse CronEntry.
* Make a output keeper to capture cron outputs.
* Make a scheduler.
* Make a task, and then start it, it will spawn and excute new job periodically.
```rust
extern crate time;
extern crate cron_rs;
use std::thread;
use std::time as stdtime;
use std::process::Command;
use cron_rs::Scheduler;
use cron_rs::Job;
use cron_rs::Server;
use cron_rs::OutputKeeper;
use cron_rs::CronEntry;
use cron_rs::Task;
fn main() {
// Make a time scheduler
let tm = time::now();
let sch = Scheduler::new("*/2 1-4,16,11,17 * * *").unwrap();
println!("{:?}", sch);
println!("{:?} {}", &tm, sch.isTimeUp(&tm));
// Parse cron string to CronEntry
let cronEntry = r#"{"intervals":"* * * * *","command":"date +%F_%T","description":"print time every minute","daemon":false,"testRun":true,"timeoutSeconds":5,"autokill":true,"alarmEmail":false,"alarmSms":true,"alarmUsers":"gaobushuang","id":1,"cronId":1,"treeId":261,"treePath":"b2c.b2cop.build-ci.build-ci.cn-test","active":false,"updateTime":"2017-02-07T13:22:52+08:00","lastCode":0,"lastJob":0,"watch":true,"host":""}"#
.parse::<CronEntry>().unwrap();
// Make time scheduler
let intervals = &*cronEntry.intervals.to_owned();
let sch = Scheduler::new(intervals).unwrap();
// Make a new server and a output keeper,
// then waiting for incoming message.
let srv = Server {
output_keeper: "foo".to_string(),
};
let mut keeper = OutputKeeper::new(&srv);
// Make a new task
let mut mytask = Task::new(sch, cronEntry, &keeper);
// mytask spawn a new job and execute it every minute.
mytask.start();
}
```
## DEPENDENICIES
* time
* regex
## FAQ