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ContextSnapshotHeader

dcontext_dactor

Struct ContextSnapshotHeader 

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pub struct ContextSnapshotHeader { /* private fields */ }
Expand description

Header carrying a ContextSnapshot for in-process (local) propagation.

This preserves local-only context values that would be lost during serialization. Preferred over ContextHeader for same-process actors.

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impl HeaderValue for ContextSnapshotHeader

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fn to_bytes(&self) -> Option<Vec<u8>>

Returns None — snapshots are local-only and not sent over the wire.

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fn header_name(&self) -> &'static str

Stable, unique name for wire transport.
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fn as_any(&self) -> &dyn Any

Downcast support.

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Blanket Implementations§

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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<F> ContextFutureExt for F

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fn with(self, store: ContextStore) -> WithContext<Self>

Wrap this future with a specific ContextStore. Read more
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fn attach(self, snap: ContextSnapshot) -> WithContext<Self>

Attach a ContextSnapshot as the active store for this future. Read more
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fn fork(self) -> WithContext<Self>

Fork the current context and wrap this future with the forked child. Read more
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fn capture(self) -> WithContext<Self>

Capture the current context and wrap this future with it. Read more
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fn scope(self, name: &str) -> WithContext<Self>

Push a named scope into the given store and wrap this future. 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: 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>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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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>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more