async_utils::hanging_get::server

Struct Publisher

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pub struct Publisher<S, O, F: Fn(&S, O) -> bool> { /* private fields */ }
Expand description

A Publisher is used to make changes to the state contained within a HangingGet. It is designed to be cheaply cloned and Send.

§Type parameters

See HangingGet for the explanation of the generic types S, O, F.

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impl<S, O, F> Publisher<S, O, F>
where F: Fn(&S, O) -> bool,

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pub fn set(&self, state: S)

Set the stored state to S. Subscribers will be updated.

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pub fn update<UpdateFn>(&self, update: UpdateFn)
where UpdateFn: FnOnce(&mut Option<S>) -> bool,

Pass a function to the hanging get that can update the hanging get state in place.

Any subscriber that has registered an observer will immediately be notified of the update.

§Type parameters
  • UpdateFn: an update function: gets passed the new state, and returns true if the state has been updated with success.

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impl<S, O, F: Fn(&S, O) -> bool> Clone for Publisher<S, O, F>

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fn clone(&self) -> Self

Clones this Publisher.

It is cheap to clone a Publisher.

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<S, O, F> Freeze for Publisher<S, O, F>

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impl<S, O, F> !RefUnwindSafe for Publisher<S, O, F>

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impl<S, O, F> Send for Publisher<S, O, F>
where F: Send, S: Send, O: Send,

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impl<S, O, F> Sync for Publisher<S, O, F>
where F: Send, S: Send, O: Send,

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impl<S, O, F> Unpin for Publisher<S, O, F>

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impl<S, O, F> !UnwindSafe for Publisher<S, O, F>

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. 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> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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
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impl<St> WithTag for St

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fn tagged<T>(self, tag: T) -> Tagged<T, St> ⓘ

Produce a new stream from this one which yields item tupled with a constant tag