How to specify static service methods? #2668
Description
I added lifetime to custom service to trait to indicate static lifetime but still fails. Why?
I know I call self.kool() before the async but can we not call it inside async with explicit static lifetime.
use std::env::var;
use std::marker::PhantomData;
use std::pin::Pin;
use std::task::{Context, Poll};
use futures::Future;
use hyper::service::Service;
use hyper::{Body, Request, Response, StatusCode};
use mongodb::options::ClientOptions;
pub struct MakeSvc<'a> {
pub(crate) _lifetime: PhantomData<&'a ()>
}
#[derive(Clone)]
pub struct Svc<'a> {
pub m: mongodb::Client,
pub(crate) _lifetime: PhantomData<&'a ()>
}
impl <'a> Svc<'a> {
pub async fn kool(&'a self)->i32{
99
}
}
impl<'a,T> Service<T> for MakeSvc<'a>{
type Response = Svc<'a>;
type Error = hyper::Error;
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, _: T) -> Self::Future {
let fut = async move {
let mongo_url = var("MONGO").unwrap_or("mongodb://localhost:27017".to_string());
let client_options = ClientOptions::parse(mongo_url).await.unwrap();
let m = mongodb::Client::with_options(client_options).unwrap();
Ok(Svc { m, _lifetime: Default::default() })
};
Box::pin(fut)
}
}
impl<'a> Service<Request<Body>> for Svc<'a> {
type Response = Response<Body>;
type Error = hyper::Error;
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> +'a + Send>>;
fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
let res = async move {
match (req.method(), req.uri().path()) {
_ => {
self.kool();
Ok(Response::builder()
.status(StatusCode::NOT_FOUND)
.body("sorry".into())
.unwrap())
}
}
};
Box::pin(res)
}
}[dependencies]
tokio = { version = "1.8.0", features = ["full"] }
hyper = {version="0.14.13",features=["full"]}
tower = {version="0.4.8", features=["full"]}
mongodb = {version="2.0.1"}
futures = "0.3.15"