GroupedStream

rust_rule_engine::streaming::operators

Struct GroupedStream 

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pub struct GroupedStream<K>
where
    K: Hash + Eq,
{ /* private fields */ }
Expand description

Grouped stream for aggregations

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impl<K> GroupedStream<K>
where K: Hash + Eq + Clone,

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pub fn aggregate<A>(self, aggregator: A) -> HashMap<K, AggregateResult>
where A: Aggregation + Clone,

Apply aggregation to each group

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pub fn count(self) -> HashMap<K, usize>

Count events in each group

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pub fn first(self) -> HashMap<K, StreamEvent>

Get the first event in each group

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pub fn last(self) -> HashMap<K, StreamEvent>

Get the last event in each group

Auto Trait Implementations§

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impl<K> Freeze for GroupedStream<K>

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impl<K> RefUnwindSafe for GroupedStream<K>
where K: RefUnwindSafe,

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impl<K> Send for GroupedStream<K>
where K: Send,

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impl<K> Sync for GroupedStream<K>
where K: Sync,

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impl<K> Unpin for GroupedStream<K>
where K: Unpin,

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impl<K> UnwindSafe for GroupedStream<K>
where K: UnwindSafe,

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<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> IntoEither for T

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

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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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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> ErasedDestructor for T
where T: 'static,