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IsolatedHandler

Struct IsolatedHandler 

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pub struct IsolatedHandler<F> { /* private fields */ }
Expand description

Wraps a handler function with panic isolation and cancellation checking.

This is a convenience for wrapping synchronous handlers that don’t need the full RequestRegion API but still want isolation guarantees.

let handler = IsolatedHandler::new(|ctx| {
    let id = ctx.path_param("id").unwrap_or("unknown");
    Response::new(StatusCode::OK, format!("User: {id}"))
});

let cx = Cx::for_testing();
let req = Request::new("GET", "/users/42");
let resp = handler.call(&cx, req);
assert_eq!(resp.status, StatusCode::OK);

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impl<F> IsolatedHandler<F>
where F: Fn(&RequestContext<'_>) -> Response + Send + Sync + 'static,

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pub fn new(handler: F) -> Self

Wrap a handler function with isolation.

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pub fn call(&self, cx: &Cx, request: Request) -> Response

Execute the handler with panic isolation.

Returns an HTTP response in all cases — panics are caught and converted to 500 responses.

Auto Trait Implementations§

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impl<F> Freeze for IsolatedHandler<F>
where F: Freeze,

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impl<F> RefUnwindSafe for IsolatedHandler<F>
where F: RefUnwindSafe,

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impl<F> Send for IsolatedHandler<F>
where F: Send,

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impl<F> Sync for IsolatedHandler<F>
where F: Sync,

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impl<F> Unpin for IsolatedHandler<F>
where F: Unpin,

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impl<F> UnsafeUnpin for IsolatedHandler<F>
where F: UnsafeUnpin,

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impl<F> UnwindSafe for IsolatedHandler<F>
where F: UnwindSafe,

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, _span: NoopSpan) -> Self

Instruments this future with a span (no-op when disabled).
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fn in_current_span(self) -> Self

Instruments this future with the current span (no-op when disabled).
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

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where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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