async_helpers::hanging_get::async_server

Struct Subscriber

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pub struct Subscriber<O> { /* private fields */ }
Expand description

A Subscriber can be used to register observation requests with the HangingGetBroker. These observations will be fulfilled when the state changes or immediately the first time a Subscriber registers an observation.

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impl<O> Subscriber<O>

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pub async fn register( &mut self, observation: O, ) -> Result<(), HangingGetServerError>

Register a new observation. Errors occur when:

  • A Subscriber is sending observation requests at too high a rate.
  • The HangingGetBroker has been dropped by the server.

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impl<O> From<Sender<O, Result<(), HangingGetServerError>>> for Subscriber<O>

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fn from(sender: Sender<O, Result<(), HangingGetServerError>>) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

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impl<O> Freeze for Subscriber<O>

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impl<O> !RefUnwindSafe for Subscriber<O>

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impl<O> Send for Subscriber<O>
where O: Send,

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impl<O> Sync for Subscriber<O>
where O: Send,

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impl<O> Unpin for Subscriber<O>

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impl<O> !UnwindSafe for Subscriber<O>

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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, 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, 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, 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<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