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better FnNewService definition

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This commit is contained in:
Nikolay Kim 2018-08-21 20:42:43 -07:00
parent b8c8dbc90a
commit 0f8cd0f44d
2 changed files with 13 additions and 17 deletions
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12
examples/basic.rs
View File

@ -68,19 +68,13 @@ fn main() {
SslAcceptorExt::accept_async(&acceptor, stream) SslAcceptorExt::accept_async(&acceptor, stream)
.map_err(|e| io::Error::new(io::ErrorKind::Other, e)) .map_err(|e| io::Error::new(io::ErrorKind::Other, e))
}) })
// convert closure to a `NewService` and convert init error // convert closure to a `NewService`
.into_new_service().map_init_err(|_| io::Error::new(io::ErrorKind::Other, "")) .into_new_service()
// .and_then() combinator uses other service to convert incoming `Request` to a `Response` // .and_then() combinator uses other service to convert incoming `Request` to a `Response`
// and then uses that response as an input for next service. // and then uses that response as an input for next service.
// in this case, on success we use `logger` service // in this case, on success we use `logger` service
.and_then( .and_then(logger)
// convert function to a Service and related NewService impl
logger.into_new_service()
// if service is a function actix-net generate NewService impl with InitError=(),
// but actix_net::Server requires io::Error as InitError,
// we need to convert it to a `io::Error`
.map_init_err(|_| io::Error::new(io::ErrorKind::Other, "")))
// next service uses two components, service state and service function // next service uses two components, service state and service function
// actix-net generates `NewService` impl that creates `ServiceState` instance for each new service // actix-net generates `NewService` impl that creates `ServiceState` instance for each new service

18
src/service.rs
View File

@ -163,7 +163,7 @@ where
} }
} }
pub struct FnNewService<F, Req, Resp, Err, Fut, Cfg> pub struct FnNewService<F, Req, Resp, Err, IErr, Fut, Cfg>
where where
F: Fn(Req) -> Fut, F: Fn(Req) -> Fut,
Fut: IntoFuture<Item = Resp, Error = Err>, Fut: IntoFuture<Item = Resp, Error = Err>,
@ -172,10 +172,11 @@ where
req: marker::PhantomData<Req>, req: marker::PhantomData<Req>,
resp: marker::PhantomData<Resp>, resp: marker::PhantomData<Resp>,
err: marker::PhantomData<Err>, err: marker::PhantomData<Err>,
ierr: marker::PhantomData<IErr>,
cfg: marker::PhantomData<Cfg>, cfg: marker::PhantomData<Cfg>,
} }
impl<F, Req, Resp, Err, Fut, Cfg> FnNewService<F, Req, Resp, Err, Fut, Cfg> impl<F, Req, Resp, Err, IErr, Fut, Cfg> FnNewService<F, Req, Resp, Err, IErr, Fut, Cfg>
where where
F: Fn(Req) -> Fut + Clone, F: Fn(Req) -> Fut + Clone,
Fut: IntoFuture<Item = Resp, Error = Err>, Fut: IntoFuture<Item = Resp, Error = Err>,
@ -186,12 +187,13 @@ where
req: marker::PhantomData, req: marker::PhantomData,
resp: marker::PhantomData, resp: marker::PhantomData,
err: marker::PhantomData, err: marker::PhantomData,
ierr: marker::PhantomData,
cfg: marker::PhantomData, cfg: marker::PhantomData,
} }
} }
} }
impl<F, Req, Resp, Err, Fut, Cfg> NewService for FnNewService<F, Req, Resp, Err, Fut, Cfg> impl<F, Req, Resp, Err, IErr, Fut, Cfg> NewService for FnNewService<F, Req, Resp, Err, IErr, Fut, Cfg>
where where
F: Fn(Req) -> Fut + Clone, F: Fn(Req) -> Fut + Clone,
Fut: IntoFuture<Item = Resp, Error = Err>, Fut: IntoFuture<Item = Resp, Error = Err>,
@ -202,27 +204,27 @@ where
type Error = Err; type Error = Err;
type Service = FnService<F, Req, Resp, Err, Fut>; type Service = FnService<F, Req, Resp, Err, Fut>;
type Config = Cfg; type Config = Cfg;
type InitError = (); type InitError = IErr;
type Future = FutureResult<Self::Service, ()>; type Future = FutureResult<Self::Service, Self::InitError>;
fn new_service(&self, cfg: Cfg) -> Self::Future { fn new_service(&self, cfg: Cfg) -> Self::Future {
future::ok(FnService::new(self.f.clone())) future::ok(FnService::new(self.f.clone()))
} }
} }
impl<F, Req, Resp, Err, Fut, Cfg> IntoNewService<FnNewService<F, Req, Resp, Err, Fut, Cfg>> impl<F, Req, Resp, Err, IErr, Fut, Cfg> IntoNewService<FnNewService<F, Req, Resp, Err, IErr, Fut, Cfg>>
for F for F
where where
F: Fn(Req) -> Fut + Clone + 'static, F: Fn(Req) -> Fut + Clone + 'static,
Fut: IntoFuture<Item = Resp, Error = Err>, Fut: IntoFuture<Item = Resp, Error = Err>,
Cfg: Clone, Cfg: Clone,
{ {
fn into_new_service(self) -> FnNewService<F, Req, Resp, Err, Fut, Cfg> { fn into_new_service(self) -> FnNewService<F, Req, Resp, Err, IErr, Fut, Cfg> {
FnNewService::new(self) FnNewService::new(self)
} }
} }
impl<F, Req, Resp, Err, Fut, Cfg> Clone for FnNewService<F, Req, Resp, Err, Fut, Cfg> impl<F, Req, Resp, Err, IErr, Fut, Cfg> Clone for FnNewService<F, Req, Resp, Err, IErr, Fut, Cfg>
where where
F: Fn(Req) -> Fut + Clone, F: Fn(Req) -> Fut + Clone,
Fut: IntoFuture<Item = Resp, Error = Err>, Fut: IntoFuture<Item = Resp, Error = Err>,