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Original file line number | Diff line number | Diff line change |
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mod sync; | ||
mod unsync; | ||
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#[allow(unreachable_pub)] // https://github.com/rust-lang/rust/issues/57411 | ||
pub use self::{ | ||
sync::BoxCloneService, unsync::UnsyncBoxCloneService, | ||
}; |
2 changes: 1 addition & 1 deletion
2
tower/src/util/boxed_clone.rs → tower/src/util/boxed_clone/sync.rs
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Original file line number | Diff line number | Diff line change |
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@@ -1,4 +1,4 @@ | ||
use super::ServiceExt; | ||
use crate::ServiceExt; | ||
use futures_util::future::BoxFuture; | ||
use std::{ | ||
fmt, | ||
|
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use crate::ServiceExt; | ||
use futures_util::future::LocalBoxFuture; | ||
use std::{ | ||
fmt, | ||
task::{Context, Poll}, | ||
}; | ||
use tower_layer::{layer_fn, LayerFn}; | ||
use tower_service::Service; | ||
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/// A boxed [`CloneService`] trait object. | ||
/// | ||
/// This type alias represents a boxed future that is *not* [`Send`] and must | ||
/// remain on the current thread. | ||
pub struct UnsyncBoxCloneService<T, U, E>( | ||
Box< | ||
dyn UnsyncCloneService<T, Response = U, Error = E, Future = LocalBoxFuture<'static, Result<U, E>>> | ||
>, | ||
); | ||
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impl<T, U, E> UnsyncBoxCloneService<T, U, E> { | ||
/// Create a new `BoxCloneService`. | ||
pub fn new<S>(inner: S) -> Self | ||
where | ||
S: Service<T, Response = U, Error = E> + Clone + 'static, | ||
S::Future: 'static, | ||
{ | ||
let inner = inner.map_future(|f| Box::pin(f) as _); | ||
UnsyncBoxCloneService(Box::new(inner)) | ||
} | ||
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/// Returns a [`Layer`] for wrapping a [`Service`] in a [`BoxCloneService`] | ||
/// middleware. | ||
/// | ||
/// [`Layer`]: crate::Layer | ||
pub fn layer<S>() -> LayerFn<fn(S) -> Self> | ||
where | ||
S: Service<T, Response = U, Error = E> + Clone + 'static, | ||
S::Future: 'static, | ||
{ | ||
layer_fn(Self::new) | ||
} | ||
} | ||
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impl<T, U, E> Service<T> for UnsyncBoxCloneService<T, U, E> { | ||
type Response = U; | ||
type Error = E; | ||
type Future = LocalBoxFuture<'static, Result<U, E>>; | ||
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#[inline] | ||
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), E>> { | ||
self.0.poll_ready(cx) | ||
} | ||
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#[inline] | ||
fn call(&mut self, request: T) -> Self::Future { | ||
self.0.call(request) | ||
} | ||
} | ||
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impl<T, U, E> Clone for UnsyncBoxCloneService<T, U, E> { | ||
fn clone(&self) -> Self { | ||
Self(self.0.clone_box()) | ||
} | ||
} | ||
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trait UnsyncCloneService<R>: Service<R> { | ||
fn clone_box( | ||
&self, | ||
) -> Box< | ||
dyn UnsyncCloneService<R, Response = Self::Response, Error = Self::Error, Future = Self::Future>, | ||
>; | ||
} | ||
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impl<R, T> UnsyncCloneService<R> for T | ||
where | ||
T: Service<R> + Clone + 'static, | ||
{ | ||
fn clone_box( | ||
&self, | ||
) -> Box<dyn UnsyncCloneService<R, Response = T::Response, Error = T::Error, Future = T::Future>> | ||
{ | ||
Box::new(self.clone()) | ||
} | ||
} | ||
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impl<T, U, E> fmt::Debug for UnsyncBoxCloneService<T, U, E> { | ||
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { | ||
fmt.debug_struct("BoxCloneService").finish() | ||
} | ||
} |
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