delay-timer

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.

Since the library currently includes features such as linked_list_cursors, it needs to be developed in a nightly version.

In the next release, we will be able to stabilize to the stable version.

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.

Build License Cargo Documentation image

Examples

``` 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 for AuspiciousTime { fn into(self) -> CandyCronStr { match self { Self::PerSevenSeconds => CandyCronStr("0/7 * * * * * *"), Self::PerEightSeconds => CandyCronStr("0/8 * * * * * *"), Self::LoveTime => CandyCronStr("0,10,15,25,50 0/1 * * Jan-Dec * 2020-2100"), } } } ```

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 + 'static + Send + Sync { move |context| { let futureinner = asynctemplate(get_timestamp() as i32, name.clone());

     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 for AuspiciousTime { fn into(self) -> CandyCronStr { match self { Self::PerSevenSeconds => CandyCronStr("0/7 * * * * * *"), Self::PerEightSeconds => CandyCronStr("0/8 * * * * * *"), Self::LoveTime => CandyCronStr("0,10,15,25,50 0/1 * * Jan-Dec * 2020-2100"), } } } ```

There's a lot more in the [examples] directory.

License

Licensed under either of

To Do List

Contribution

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.

The author comments:

Make an upgrade plan for smooth updates in the future, Such as stop serve back-up unfinished task then up new version serve load task.bak, Runing.