wd_pool 0.1.0

A pool crate for rust
Documentation 
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use std::future::Future;
use std::pin::Pin;
use crate::{Object, ObjectPool, ObjectPoolHandle};
use async_channel::{Sender, Receiver};


pub struct ObjPoolContainer<Obj>{
    sender: Sender<Obj>,
    receiver: Receiver<Obj>
}

impl<Obj:Object + Send> ObjPoolContainer<Obj> {
    pub fn new()->ObjPoolContainer<Obj>{
        let (sender,receiver) = async_channel::unbounded();
        Self{sender,receiver}
    }
    pub fn set_pool_max(mut self,max:usize)->Self{
        let (s,r) = async_channel::bounded(max);
        self.sender = s;
        self.receiver = r;
        self
    }
    pub fn build(self)->impl ObjectPool<Obj> {
        self
    }

    #[allow(dead_code)]
    pub async fn handle<Out,Handle:ObjectPoolHandle<Obj,Out>>(&self, handle:Handle) ->Out{
        let obj = self.get().await;
        let (oo,result) = handle.handle(obj).await;
        if let Some(s) = oo {
            self.release(s).await;
        }
        return result;
    }

    pub async fn function<Out:Send,F>(&self, function:F) ->Out
    where F: FnOnce(Obj)->Pin<Box<dyn Future<Output=(Option<Obj>,Out)>+Send>>+Send
    {
        let obj = self.get().await;
        let (oo,result) = function(obj).await;
        if let Some(s) = oo {
            self.release(s).await;
        }
        return result;
    }

}

#[async_trait::async_trait]
impl<Obj:Object + Send> ObjectPool<Obj> for ObjPoolContainer<Obj> {
    async fn get(&self) -> Obj {
        let result = self.receiver.try_recv();
        if let Ok(obj) = result{
            return obj;
        }
        let mut obj = Obj::default();
        obj.init().await;
        return obj;
    }

    async fn release(&self, mut o: Obj) {
        o.reset().await;
        let _result = self.sender.try_send(o);
    }
}