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refactor app_service (#1877)

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fakeshadow 2021-01-06 19:35:30 +08:00 committed by GitHub
parent 68117543ea
commit 57da1d3c0f
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2 changed files with 60 additions and 123 deletions
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5
src/app.rs
View file

@ -458,11 +458,12 @@ where
Error = Error,
InitError = (),
>,
T::Future: 'static,
{
fn into_factory(self) -> AppInit<T, B> {
AppInit {
data: self.data.into_boxed_slice().into(),
data_factories: self.data_factories.into_boxed_slice().into(),
data_factories: self.data.into_boxed_slice().into(),
async_data_factories: self.data_factories.into_boxed_slice().into(),
endpoint: self.endpoint,
services: Rc::new(RefCell::new(self.services)),
external: RefCell::new(self.external),

178
src/app_service.rs
View file

@ -1,15 +1,15 @@
use std::cell::RefCell;
use std::future::Future;
use std::marker::PhantomData;
use std::pin::Pin;
use std::rc::Rc;
use std::task::{Context, Poll};
use actix_http::{Extensions, Request, Response};
use actix_router::{Path, ResourceDef, ResourceInfo, Router, Url};
use actix_router::{Path, ResourceDef, Router, Url};
use actix_service::boxed::{self, BoxService, BoxServiceFactory};
use actix_service::{fn_service, Service, ServiceFactory};
use futures_util::future::{join_all, ok, FutureExt, LocalBoxFuture};
use futures_core::future::LocalBoxFuture;
use futures_util::future::join_all;
use crate::config::{AppConfig, AppService};
use crate::data::{DataFactory, FnDataFactory};
@ -22,7 +22,6 @@ use crate::service::{AppServiceFactory, ServiceRequest, ServiceResponse};
type Guards = Vec<Box<dyn Guard>>;
type HttpService = BoxService<ServiceRequest, ServiceResponse, Error>;
type HttpNewService = BoxServiceFactory<(), ServiceRequest, ServiceResponse, Error, ()>;
type BoxResponse = LocalBoxFuture<'static, Result<ServiceResponse, Error>>;
/// Service factory to convert `Request` to a `ServiceRequest<S>`.
/// It also executes data factories.
@ -38,8 +37,8 @@ where
{
pub(crate) endpoint: T,
pub(crate) extensions: RefCell<Option<Extensions>>,
pub(crate) data: Rc<[Box<dyn DataFactory>]>,
pub(crate) data_factories: Rc<[FnDataFactory]>,
pub(crate) data_factories: Rc<[Box<dyn DataFactory>]>,
pub(crate) async_data_factories: Rc<[FnDataFactory]>,
pub(crate) services: Rc<RefCell<Vec<Box<dyn AppServiceFactory>>>>,
pub(crate) default: Option<Rc<HttpNewService>>,
pub(crate) factory_ref: Rc<RefCell<Option<AppRoutingFactory>>>,
@ -55,24 +54,26 @@ where
Error = Error,
InitError = (),
>,
T::Future: 'static,
{
type Response = ServiceResponse<B>;
type Error = T::Error;
type Config = AppConfig;
type Service = AppInitService<T::Service, B>;
type InitError = T::InitError;
type Future = AppInitResult<T, B>;
type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
fn new_service(&self, config: AppConfig) -> Self::Future {
// update resource default service
let default = self.default.clone().unwrap_or_else(|| {
Rc::new(boxed::factory(fn_service(|req: ServiceRequest| {
ok(req.into_response(Response::NotFound().finish()))
Rc::new(boxed::factory(fn_service(|req: ServiceRequest| async {
Ok(req.into_response(Response::NotFound().finish()))
})))
});
// App config
let mut config = AppService::new(config, default.clone(), self.data.clone());
let mut config =
AppService::new(config, default.clone(), self.data_factories.clone());
// register services
std::mem::take(&mut *self.services.borrow_mut())
@ -83,7 +84,7 @@ where
let (config, services) = config.into_services();
// complete pipeline creation
// complete pipeline creation.
*self.factory_ref.borrow_mut() = Some(AppRoutingFactory {
default,
services: services
@ -106,107 +107,48 @@ where
let rmap = Rc::new(rmap);
rmap.finish(rmap.clone());
// start all data factory futures
let factory_futs = join_all(self.data_factories.iter().map(|f| f()));
// construct all async data factory futures
let factory_futs = join_all(self.async_data_factories.iter().map(|f| f()));
AppInitResult {
endpoint: None,
endpoint_fut: self.endpoint.new_service(()),
data: self.data.clone(),
data_factories: None,
data_factories_fut: factory_futs.boxed_local(),
extensions: Some(
self.extensions
.borrow_mut()
.take()
.unwrap_or_else(Extensions::new),
),
config,
rmap,
_phantom: PhantomData,
}
}
}
// construct app service and middleware service factory future.
let endpoint_fut = self.endpoint.new_service(());
#[pin_project::pin_project]
pub struct AppInitResult<T, B>
where
T: ServiceFactory<ServiceRequest>,
{
#[pin]
endpoint_fut: T::Future,
// a Some signals completion of endpoint creation
endpoint: Option<T::Service>,
// take extensions or create new one as app data container.
let mut app_data = self
.extensions
.borrow_mut()
.take()
.unwrap_or_else(Extensions::new);
#[pin]
data_factories_fut: LocalBoxFuture<'static, Vec<Result<Box<dyn DataFactory>, ()>>>,
// a Some signals completion of factory futures
data_factories: Option<Vec<Box<dyn DataFactory>>>,
let data_factories = self.data_factories.clone();
rmap: Rc<ResourceMap>,
config: AppConfig,
data: Rc<[Box<dyn DataFactory>]>,
extensions: Option<Extensions>,
Box::pin(async move {
// async data factories
let async_data_factories = factory_futs
.await
.into_iter()
.collect::<Result<Vec<_>, _>>()
.map_err(|_| ())?;
_phantom: PhantomData<B>,
}
// app service and middleware
let service = endpoint_fut.await?;
impl<T, B> Future for AppInitResult<T, B>
where
T: ServiceFactory<
ServiceRequest,
Config = (),
Response = ServiceResponse<B>,
Error = Error,
InitError = (),
>,
{
type Output = Result<AppInitService<T::Service, B>, ()>;
// populate app data container from (async) data factories.
data_factories
.iter()
.chain(&async_data_factories)
.for_each(|factory| {
factory.create(&mut app_data);
});
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.project();
// async data factories
if let Poll::Ready(factories) = this.data_factories_fut.poll(cx) {
let factories: Result<Vec<_>, ()> = factories.into_iter().collect();
if let Ok(factories) = factories {
this.data_factories.replace(factories);
} else {
return Poll::Ready(Err(()));
}
}
// app service and middleware
if this.endpoint.is_none() {
if let Poll::Ready(srv) = this.endpoint_fut.poll(cx)? {
*this.endpoint = Some(srv);
}
}
// not using if let so condition only needs shared ref
if this.endpoint.is_some() && this.data_factories.is_some() {
// create app data container
let mut data = this.extensions.take().unwrap();
for f in this.data.iter() {
f.create(&mut data);
}
for f in this.data_factories.take().unwrap().iter() {
f.create(&mut data);
}
return Poll::Ready(Ok(AppInitService {
service: this.endpoint.take().unwrap(),
rmap: this.rmap.clone(),
config: this.config.clone(),
data: Rc::new(data),
Ok(AppInitService {
service,
rmap,
config,
app_data: Rc::new(app_data),
pool: HttpRequestPool::create(),
}));
}
Poll::Pending
})
})
}
}
@ -218,7 +160,7 @@ where
service: T,
rmap: Rc<ResourceMap>,
config: AppConfig,
data: Rc<Extensions>,
app_data: Rc<Extensions>,
pool: &'static HttpRequestPool,
}
@ -251,7 +193,7 @@ where
payload,
self.rmap.clone(),
self.config.clone(),
self.data.clone(),
self.app_data.clone(),
self.pool,
)
};
@ -290,7 +232,7 @@ impl ServiceFactory<ServiceRequest> for AppRoutingFactory {
CreateAppRoutingItem::Future(
Some(path.clone()),
guards.borrow_mut().take(),
service.new_service(()).boxed_local(),
Box::pin(service.new_service(())),
)
})
.collect(),
@ -307,7 +249,7 @@ type HttpServiceFut = LocalBoxFuture<'static, Result<HttpService, ()>>;
pub struct AppRoutingFactoryResponse {
fut: Vec<CreateAppRoutingItem>,
default: Option<HttpService>,
default_fut: Option<LocalBoxFuture<'static, Result<HttpService, ()>>>,
default_fut: Option<HttpServiceFut>,
}
enum CreateAppRoutingItem {
@ -367,7 +309,6 @@ impl Future for AppRoutingFactoryResponse {
router
});
Poll::Ready(Ok(AppRouting {
ready: None,
router: router.finish(),
default: self.default.take(),
}))
@ -379,22 +320,15 @@ impl Future for AppRoutingFactoryResponse {
pub struct AppRouting {
router: Router<HttpService, Guards>,
ready: Option<(ServiceRequest, ResourceInfo)>,
default: Option<HttpService>,
}
impl Service<ServiceRequest> for AppRouting {
type Response = ServiceResponse;
type Error = Error;
type Future = BoxResponse;
type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
if self.ready.is_none() {
Poll::Ready(Ok(()))
} else {
Poll::Pending
}
}
actix_service::always_ready!();
fn call(&mut self, mut req: ServiceRequest) -> Self::Future {
let res = self.router.recognize_mut_checked(&mut req, |req, guards| {
@ -414,7 +348,9 @@ impl Service<ServiceRequest> for AppRouting {
default.call(req)
} else {
let req = req.into_parts().0;
ok(ServiceResponse::new(req, Response::NotFound().finish())).boxed_local()
Box::pin(async {
Ok(ServiceResponse::new(req, Response::NotFound().finish()))
})
}
}
}
@ -431,11 +367,11 @@ impl AppEntry {
}
impl ServiceFactory<ServiceRequest> for AppEntry {
type Config = ();
type Response = ServiceResponse;
type Error = Error;
type InitError = ();
type Config = ();
type Service = AppRouting;
type InitError = ();
type Future = AppRoutingFactoryResponse;
fn new_service(&self, _: ()) -> Self::Future {