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Producer

Struct Producer 

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

Publishes a binary value over a track, one value per group.

Each update rolls a new group holding the whole value, so a consumer only ever needs the newest group and older ones are dropped. For a log where every payload survives, use stream instead.

Cheaply clonable: clones share one underlying track, like other MoQ producers.

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impl Producer

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pub fn new(track: Producer, config: Config) -> Self

Create a producer that publishes to the given track.

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pub fn consume(&self) -> Subscriber

Create a subscriber for the underlying track.

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pub fn is_used(&self) -> bool

Whether any consumer for the underlying track currently exists.

The demand signal for a producer serving on request: an unused track is cached state nobody is watching, safe to drop and recreate on the next request.

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pub fn update(&mut self, payload: impl Into<Bytes>) -> Result<()>

Publish a new value, superseding the previous one.

Unlike moq-json, an identical value is republished rather than skipped: comparing two opaque blobs costs a full scan, and only the caller knows whether its bytes changed.

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pub fn finish(&mut self) -> Result<()>

Finish the track.

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impl Clone for Producer

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

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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, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> MaybeSend for T
where T: Send,

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impl<T> MaybeSend for T
where T: Send + ?Sized,

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impl<T> MaybeSend for T
where T: Send,

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impl<T> MaybeSync for T
where T: Sync,

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impl<T> MaybeSync for T
where T: Sync,

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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 = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

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