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ReduceOperator

oxirs_stream::processing::operators

Struct ReduceOperator 

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pub struct ReduceOperator<F, S>
where
    F: Fn(&mut S, StreamEvent) -> Result<()> + Send + Sync,
    S: Clone + Send + Sync,
{ /* private fields */ }
Expand description

Reduce operator - stateful aggregation

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impl<F, S> ReduceOperator<F, S>
where F: Fn(&mut S, StreamEvent) -> Result<()> + Send + Sync, S: Clone + Send + Sync,

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pub fn new(initial_state: S, reducer: F) -> Self

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pub fn get_state(&self) -> &S

Trait Implementations§

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impl<F, S> StreamOperator for ReduceOperator<F, S>
where F: Fn(&mut S, StreamEvent) -> Result<()> + Send + Sync, S: Clone + Send + Sync,

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fn apply<'life0, 'async_trait>( &'life0 mut self, event: StreamEvent, ) -> Pin<Box<dyn Future<Output = Result<Vec<StreamEvent>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Apply operator to an event
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fn stats(&self) -> OperatorStats

Get operator statistics
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fn reset(&mut self)

Reset operator state

Auto Trait Implementations§

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impl<F, S> Freeze for ReduceOperator<F, S>
where S: Freeze,

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impl<F, S> RefUnwindSafe for ReduceOperator<F, S>
where S: RefUnwindSafe, F: RefUnwindSafe,

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impl<F, S> Send for ReduceOperator<F, S>

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impl<F, S> Sync for ReduceOperator<F, S>

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impl<F, S> Unpin for ReduceOperator<F, S>
where S: Unpin,

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impl<F, S> UnsafeUnpin for ReduceOperator<F, S>
where S: UnsafeUnpin,

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impl<F, S> UnwindSafe for ReduceOperator<F, S>
where S: UnwindSafe, F: RefUnwindSafe,

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

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

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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>

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where U: From<T>,

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Calls U::from(self).

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fn into_either(self, into_left: bool) -> Either<Self, Self>

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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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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

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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

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where T: ?Sized,

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where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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type Output = T

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