Time-manager of delayed tasks. Like crontab, but synchronous asynchronous tasks are possible, and dynamic add/cancel/remove is supported.
delay-timer is a task manager based on a time wheel algorithm, which makes it easy to manage timed tasks, or to periodically execute arbitrary tasks such as closures.
The underlying runtime is based on the optional smol and tokio, and you can build your application with either one.
The minimum-supported version of rustc is 1.49.
Except for the simple execution in a few seconds, you can also specify a specific date, such as Sunday at 4am to execute a backup task.
Supports configuration of the maximum number of parallelism of tasks.
``` rust
#[macrouse] use delaytimer::prelude::*;
use std::str::FromStr; use std::sync::atomic::{ AtomicUsize, Ordering::{Acquire, Release}, }; use std::sync::{atomic::AtomicI32, Arc}; use std::thread::{self, park_timeout}; use std::time::Duration; use smol::Timer; use hyper::{Client, Uri};
fn main() { let delay_timer = DelayTimerBuilder::default().build();
// Add an asynchronous task to delay_timer.
delay_timer.add_task(build_task(TaskBuilder::default()));
// Since the tasks are executed in 8-second cycles,
// we deal with something else.
// Do someting about 8s.
thread::sleep(Duration::new(8, 1_000_000));
delay_timer.remove_task(1);
delay_timer.stop_delay_timer();
}
fn buildtask(mut taskbuilder: TaskBuilder) -> Task { let body = createasyncfnbody!({ let mut res = surf::get("https://httpbin.org/get").await.unwrap(); dbg!(res.bodystring().await.unwrap()); });
task_builder
.set_frequency_by_candy(CandyFrequency::Repeated(AuspiciousTime::PerEightSeconds))
.set_task_id(2)
.set_maximum_running_time(5)
.spawn(body)
.unwrap()
}
enum AuspiciousTime { PerSevenSeconds, PerEightSeconds, LoveTime, }
impl Into
Capture the specified environment information and build the closure & task:
``` rust #[macrouse] use delaytimer::prelude::*;
use std::str::FromStr; use std::sync::atomic::{ AtomicUsize, Ordering::{Acquire, Release}, }; use std::sync::{atomic::AtomicI32, Arc}; use std::thread::{self, park_timeout}; use std::time::Duration; use smol::Timer; use hyper::{Client, Uri};
let delay_timer = DelayTimer::new();
let sharenum = Arc::new(AtomicUsize::new(0)); let sharenumbunshin = sharenum.clone();
let body = createasyncfnbody!((sharenumbunshin){ sharenumbunshinref.fetchadd(1, Release); Timer::after(Duration::fromsecs(9)).await; sharenumbunshinref.fetchsub(1, Release); });
let task = TaskBuilder::default() .setfrequencybycandy(CandyFrequency::CountDown(9, CandyCron::Secondly)) .settaskid(1) .setmaximunparallelrunable_num(3) .spawn(body) .unwrap();
delaytimer.addtask(task).unwrap();
```
Building dynamic future tasks: ``` rust #[macrouse] use delaytimer::prelude::*;
use std::str::FromStr; use std::sync::atomic::{ AtomicUsize, Ordering::{Acquire, Release}, }; use std::sync::{atomic::AtomicI32, Arc}; use std::thread::{self, park_timeout}; use std::time::Duration; use smol::Timer; use hyper::{Client, Uri};
fn buildtask(mut taskbuilder: TaskBuilder) -> Task { let body = generateclosuretemplate(String::from("dynamic"));
task_builder
.set_frequency_by_candy(CandyFrequency::Repeated(AuspiciousTime::PerEightSeconds))
.set_task_id(2)
.set_maximum_running_time(5)
.spawn(body)
.unwrap()
}
pub fn generateclosuretemplate(
name: String,
) -> impl Fn(TaskContext) -> Box
let future = async move {
future_inner.await;
context.finishe_task().await;
};
create_delay_task_handler(async_spawn_by_tokio(future))
}
}
pub async fn async_template(id: i32, name: String) { let client = Client::new();
let url = format!("http://httpbin.org/get?id={}&name={}", id, name);
let uri: Uri = url.parse().unwrap();
let res = client.get(uri).await.unwrap();
println!("Response: {}", res.status());
// Concatenate the body stream into a single buffer...
let buf = hyper::body::to_bytes(res).await.unwrap();
println!("body: {:?}", buf);
}
enum AuspiciousTime { PerSevenSeconds, PerEightSeconds, LoveTime, }
impl Into
There's a lot more in the [examples] directory.
Licensed under either of
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
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