Type Alias Stream

pub type Stream<S, D> = StreamCore<S, Vec<D>>;

A stream batching data in vectors.

Aliased Type

struct Stream<S, D> { /* private fields */ }

Implementations

impl<S: Scope, C: Container> StreamCore<S, C>

pub fn connect_to<P: Push<Message<S::Timestamp, C>> + 'static>( &self, target: Target, pusher: P, identifier: usize, )

Connects the stream to a destination.

The destination is described both by a Target, for progress tracking information, and a P: Push where the records should actually be sent. The identifier is unique to the edge and is used only for logging purposes.

pub fn new(source: Source, output: TeeHelper<S::Timestamp, C>, scope: S) -> Self

Allocates a Stream from a supplied Source name and rendezvous point.

pub fn name(&self) -> &Source

The name of the stream’s source operator.

pub fn scope(&self) -> S

The scope immediately containing the stream.

pub fn container<D: Container>(self) -> StreamCore<S, D>

where Self: AsStream<S, D>,

Allows the assertion of a container type, for the benefit of type inference.

Trait Implementations

impl<G: Scope, D: Data> Accumulate<G, D> for Stream<G, D>

fn accumulate<A: Data>( &self, default: A, logic: impl Fn(&mut A, &mut Vec<D>) + 'static, ) -> Stream<G, A>

Accumulates records within a timestamp.

fn count(&self) -> Stream<G, usize>

Counts the number of records observed at each time.

impl<S: Scope, K: ExchangeData + Hash + Eq, V: ExchangeData> Aggregate<S, K, V> for Stream<S, (K, V)>

fn aggregate<R: Data, D: Default + 'static, F: Fn(&K, V, &mut D) + 'static, E: Fn(K, D) -> R + 'static, H: Fn(&K) -> u64 + 'static>( &self, fold: F, emit: E, hash: H, ) -> Stream<S, R>

where S::Timestamp: Eq,

Aggregates data of the form (key, val), using user-supplied logic.

impl<S: Scope, D: Data> Branch<S, D> for Stream<S, D>

fn branch( &self, condition: impl Fn(&S::Timestamp, &D) -> bool + 'static, ) -> (Stream<S, D>, Stream<S, D>)

Takes one input stream and splits it into two output streams. For each record, the supplied closure is called with a reference to the data and its time. If it returns true, the record will be sent to the second returned stream, otherwise it will be sent to the first.

impl<G: Scope, D: ExchangeData> Broadcast<D> for Stream<G, D>

fn broadcast(&self) -> Stream<G, D>

Broadcast records to all workers.

impl<G: Scope, D: Data> Delay<G, D> for Stream<G, D>

fn delay<L: FnMut(&D, &G::Timestamp) -> G::Timestamp + 'static>( &self, func: L, ) -> Self

Advances the timestamp of records using a supplied function.

fn delay_total<L: FnMut(&D, &G::Timestamp) -> G::Timestamp + 'static>( &self, func: L, ) -> Self

where G::Timestamp: TotalOrder,

Advances the timestamp of records using a supplied function.

fn delay_batch<L: FnMut(&G::Timestamp) -> G::Timestamp + 'static>( &self, func: L, ) -> Self

Advances the timestamp of batches of records using a supplied function.

impl<G: Scope, D: Data> Filter<D> for Stream<G, D>

fn filter<P: FnMut(&D) -> bool + 'static>(&self, predicate: P) -> Stream<G, D>

Returns a new instance of self containing only records satisfying predicate.

impl<S: Scope, D: Data> Map<S, D> for Stream<S, D>

fn map_in_place<L: FnMut(&mut D) + 'static>(&self, logic: L) -> Stream<S, D>

Updates each element of the stream and yields the element, re-using memory where possible.

fn flat_map<I: IntoIterator, L: FnMut(D) -> I + 'static>( &self, logic: L, ) -> Stream<S, I::Item>

where I::Item: Data,

Consumes each element of the stream and yields some number of new elements.

fn map<D2: Data, L: FnMut(D) -> D2 + 'static>(&self, logic: L) -> Stream<S, D2>

Consumes each element of the stream and yields a new element.

impl<G: Scope, D: Data, D2: Data, F: Fn(D) -> (u64, D2) + 'static> Partition<G, D, D2, F> for Stream<G, D>

fn partition(&self, parts: u64, route: F) -> Vec<Stream<G, D2>>

Produces parts output streams, containing records produced and assigned by route.

impl<S: Scope, T: Data, E: Data> ResultStream<S, T, E> for Stream<S, Result<T, E>>

fn ok(&self) -> Stream<S, T>

Returns a new instance of self containing only ok records.

fn err(&self) -> Stream<S, E>

Returns a new instance of self containing only err records.

fn map_ok<T2: Data, L: FnMut(T) -> T2 + 'static>( &self, logic: L, ) -> Stream<S, Result<T2, E>>

Returns a new instance of self applying logic on all Ok records.

fn map_err<E2: Data, L: FnMut(E) -> E2 + 'static>( &self, logic: L, ) -> Stream<S, Result<T, E2>>

Returns a new instance of self applying logic on all Err records.

fn and_then<T2: Data, L: FnMut(T) -> Result<T2, E> + 'static>( &self, logic: L, ) -> Stream<S, Result<T2, E>>

Returns a new instance of self applying logic on all Ok records, passes through Err records.

fn unwrap_or_else<L: FnMut(E) -> T + 'static>(&self, logic: L) -> Stream<S, T>

Returns a new instance of self applying logic on all Ok records.

impl<S: Scope, K: ExchangeData + Hash + Eq, V: ExchangeData> StateMachine<S, K, V> for Stream<S, (K, V)>

fn state_machine<R: Data, D: Default + 'static, I: IntoIterator<Item = R>, F: Fn(&K, V, &mut D) -> (bool, I) + 'static, H: Fn(&K) -> u64 + 'static>( &self, fold: F, hash: H, ) -> Stream<S, R>

where S::Timestamp: Hash + Eq,

Tracks a state for each presented key, using user-supplied state transition logic.

impl<S: Scope, C> AsStream<S, C> for StreamCore<S, C>

fn as_stream(self) -> Self

Translate self to a StreamCore.

impl<S: Scope, C: Container + Data> BranchWhen<<S as ScopeParent>::Timestamp> for StreamCore<S, C>

fn branch_when( &self, condition: impl Fn(&S::Timestamp) -> bool + 'static, ) -> (Self, Self)

Takes one input stream and splits it into two output streams. For each time, the supplied closure is called. If it returns true, the records for that will be sent to the second returned stream, otherwise they will be sent to the first.

impl<S: Scope, C: Container + Data> Capture<<S as ScopeParent>::Timestamp, C> for StreamCore<S, C>

fn capture_into<P: EventPusher<S::Timestamp, C> + 'static>( &self, event_pusher: P, )

Captures a stream of timestamped data for later replay.

fn capture(&self) -> Receiver<Event<T, C>>

Captures a stream using Rust’s MPSC channels.

impl<S: Scope, C> Clone for StreamCore<S, C>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<G: Scope, C: Container + Data> Concat<G, C> for StreamCore<G, C>

fn concat(&self, other: &StreamCore<G, C>) -> StreamCore<G, C>

Merge the contents of two streams.

impl<G: Scope, C: Container + Data> Concatenate<G, C> for StreamCore<G, C>

fn concatenate<I>(&self, sources: I) -> StreamCore<G, C>

where I: IntoIterator<Item = StreamCore<G, C>>,

Merge the contents of multiple streams.

impl<G: Scope, C: Container + Data> ConnectLoop<G, C> for StreamCore<G, C>

fn connect_loop(&self, handle: Handle<G, C>)

Connect a Stream to be the input of a loop variable.

impl<S, C> Debug for StreamCore<S, C>

where S: Scope,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<G: Scope, T: Timestamp + Refines<G::Timestamp>, C: Data + Container> Enter<G, T, C> for StreamCore<G, C>

fn enter<'a>(&self, scope: &Child<'a, G, T>) -> StreamCore<Child<'a, G, T>, C>

Moves the Stream argument into a child of its current Scope.

impl<G: Scope, C> Exchange<C> for StreamCore<G, C>

where C: SizableContainer + ExchangeData + ContainerBytes + for<'a> PushInto<C::Item<'a>>,

fn exchange<F>(&self, route: F) -> StreamCore<G, C>

where for<'a> F: FnMut(&C::Item<'a>) -> u64 + 'static,

Exchange records between workers.

impl<G: Scope, C> Filter<C> for StreamCore<G, C>

where for<'a> C: PushInto<C::Item<'a>> + SizableContainer + Data,

fn filter<P: FnMut(&C::Item<'_>) -> bool + 'static>( &self, predicate: P, ) -> StreamCore<G, C>

Returns a new instance of self containing only records satisfying predicate.

impl<G: Scope, C: Container + Data> Inspect<G, C> for StreamCore<G, C>

fn inspect_core<F>(&self, func: F) -> Self

where F: FnMut(Result<(&G::Timestamp, &C), &[G::Timestamp]>) + 'static,

Runs a supplied closure on each observed data batch, and each frontier advancement.

fn inspect<F>(&self, func: F) -> Self

where F: for<'a> FnMut(C::ItemRef<'a>) + 'static,

Runs a supplied closure on each observed data element.

fn inspect_time<F>(&self, func: F) -> Self

where F: for<'a> FnMut(&G::Timestamp, C::ItemRef<'a>) + 'static,

Runs a supplied closure on each observed data element and associated time.

fn inspect_batch(&self, func: impl FnMut(&G::Timestamp, &C) + 'static) -> Self

Runs a supplied closure on each observed data batch (time and data slice).

impl<G: Scope, C: Container + Data> InspectCore<G, C> for StreamCore<G, C>

fn inspect_container<F>(&self, func: F) -> StreamCore<G, C>

where F: FnMut(Result<(&G::Timestamp, &C), &[G::Timestamp]>) + 'static,

Runs a supplied closure on each observed container, and each frontier advancement.

impl<G: Scope, C: Container + Data, T: Timestamp + Refines<G::Timestamp>> Leave<G, C> for StreamCore<Child<'_, G, T>, C>

fn leave(&self) -> StreamCore<G, C>

Moves a Stream to the parent of its current Scope.

impl<S: Scope, C: Container + Data> Map<S, C> for StreamCore<S, C>

fn flat_map<C2, I, L>(&self, logic: L) -> StreamCore<S, C2>

where I: IntoIterator, C2: SizableContainer + PushInto<I::Item> + Data, L: FnMut(C::Item<'_>) -> I + 'static,

Consumes each element of the stream and yields some number of new elements.

fn map<C2, D2, L>(&self, logic: L) -> StreamCore<S, C2>

where C2: SizableContainer + PushInto<D2> + Data, L: FnMut(C::Item<'_>) -> D2 + 'static,

Consumes each element of the stream and yields a new element.

impl<S: Scope, C: Container + Data> OkErr<S, C> for StreamCore<S, C>

fn ok_err<C1, D1, C2, D2, L>( &self, logic: L, ) -> (StreamCore<S, C1>, StreamCore<S, C2>)

where C1: SizableContainer + PushInto<D1> + Data, C2: SizableContainer + PushInto<D2> + Data, L: FnMut(C::Item<'_>) -> Result<D1, D2> + 'static,

Takes one input stream and splits it into two output streams. For each record, the supplied closure is called with the data. If it returns Ok(x), then x will be sent to the first returned stream; otherwise, if it returns Err(e), then e will be sent to the second.

impl<G: Scope, C1: Container + Data> Operator<G, C1> for StreamCore<G, C1>

fn unary_frontier<CB, B, L, P>( &self, pact: P, name: &str, constructor: B, ) -> StreamCore<G, CB::Container>

where CB: ContainerBuilder, B: FnOnce(Capability<G::Timestamp>, OperatorInfo) -> L, L: FnMut(&mut FrontieredInputHandleCore<'_, G::Timestamp, C1, P::Puller>, &mut OutputHandleCore<'_, G::Timestamp, CB, Tee<G::Timestamp, CB::Container>>) + 'static, P: ParallelizationContract<G::Timestamp, C1>,

Creates a new dataflow operator that partitions its input stream by a parallelization strategy pact, and repeatedly invokes logic, the function returned by the function passed as constructor. logic can read from the input stream, write to the output stream, and inspect the frontier at the input.

fn unary_notify<CB: ContainerBuilder, L: FnMut(&mut InputHandleCore<G::Timestamp, C1, P::Puller>, &mut OutputHandleCore<'_, G::Timestamp, CB, Tee<G::Timestamp, CB::Container>>, &mut Notificator<'_, G::Timestamp>) + 'static, P: ParallelizationContract<G::Timestamp, C1>>( &self, pact: P, name: &str, init: impl IntoIterator<Item = G::Timestamp>, logic: L, ) -> StreamCore<G, CB::Container>

Creates a new dataflow operator that partitions its input stream by a parallelization strategy pact, and repeatedly invokes logic, the function returned by the function passed as constructor. logic can read from the input stream, write to the output stream, and inspect the frontier at the input.

fn unary<CB, B, L, P>( &self, pact: P, name: &str, constructor: B, ) -> StreamCore<G, CB::Container>

where CB: ContainerBuilder, B: FnOnce(Capability<G::Timestamp>, OperatorInfo) -> L, L: FnMut(&mut InputHandleCore<G::Timestamp, C1, P::Puller>, &mut OutputHandleCore<'_, G::Timestamp, CB, Tee<G::Timestamp, CB::Container>>) + 'static, P: ParallelizationContract<G::Timestamp, C1>,

Creates a new dataflow operator that partitions its input stream by a parallelization strategy pact, and repeatedly invokes logic, the function returned by the function passed as constructor. logic can read from the input stream, and write to the output stream.

fn binary_frontier<C2, CB, B, L, P1, P2>( &self, other: &StreamCore<G, C2>, pact1: P1, pact2: P2, name: &str, constructor: B, ) -> StreamCore<G, CB::Container>

where C2: Container + Data, CB: ContainerBuilder, B: FnOnce(Capability<G::Timestamp>, OperatorInfo) -> L, L: FnMut(&mut FrontieredInputHandleCore<'_, G::Timestamp, C1, P1::Puller>, &mut FrontieredInputHandleCore<'_, G::Timestamp, C2, P2::Puller>, &mut OutputHandleCore<'_, G::Timestamp, CB, Tee<G::Timestamp, CB::Container>>) + 'static, P1: ParallelizationContract<G::Timestamp, C1>, P2: ParallelizationContract<G::Timestamp, C2>,

Creates a new dataflow operator that partitions its input streams by a parallelization strategy pact, and repeatedly invokes logic, the function returned by the function passed as constructor. logic can read from the input streams, write to the output stream, and inspect the frontier at the inputs.

fn binary_notify<C2: Container + Data, CB: ContainerBuilder, L: FnMut(&mut InputHandleCore<G::Timestamp, C1, P1::Puller>, &mut InputHandleCore<G::Timestamp, C2, P2::Puller>, &mut OutputHandleCore<'_, G::Timestamp, CB, Tee<G::Timestamp, CB::Container>>, &mut Notificator<'_, G::Timestamp>) + 'static, P1: ParallelizationContract<G::Timestamp, C1>, P2: ParallelizationContract<G::Timestamp, C2>>( &self, other: &StreamCore<G, C2>, pact1: P1, pact2: P2, name: &str, init: impl IntoIterator<Item = G::Timestamp>, logic: L, ) -> StreamCore<G, CB::Container>

Creates a new dataflow operator that partitions its input streams by a parallelization strategy pact, and repeatedly invokes logic, the function returned by the function passed as constructor. logic can read from the input streams, write to the output stream, and inspect the frontier at the inputs.

fn binary<C2, CB, B, L, P1, P2>( &self, other: &StreamCore<G, C2>, pact1: P1, pact2: P2, name: &str, constructor: B, ) -> StreamCore<G, CB::Container>

where C2: Container + Data, CB: ContainerBuilder, B: FnOnce(Capability<G::Timestamp>, OperatorInfo) -> L, L: FnMut(&mut InputHandleCore<G::Timestamp, C1, P1::Puller>, &mut InputHandleCore<G::Timestamp, C2, P2::Puller>, &mut OutputHandleCore<'_, G::Timestamp, CB, Tee<G::Timestamp, CB::Container>>) + 'static, P1: ParallelizationContract<G::Timestamp, C1>, P2: ParallelizationContract<G::Timestamp, C2>,

Creates a new dataflow operator that partitions its input streams by a parallelization strategy pact, and repeatedly invokes logic, the function returned by the function passed as constructor. logic can read from the input streams, write to the output stream, and inspect the frontier at the inputs.

fn sink<L, P>(&self, pact: P, name: &str, logic: L)

where L: FnMut(&mut FrontieredInputHandleCore<'_, G::Timestamp, C1, P::Puller>) + 'static, P: ParallelizationContract<G::Timestamp, C1>,

Creates a new dataflow operator that partitions its input stream by a parallelization strategy pact, and repeatedly invokes the function logic which can read from the input stream and inspect the frontier at the input.

impl<G: Scope, C: Container + Data> Partition<G, C> for StreamCore<G, C>

fn partition<CB, D2, F>( &self, parts: u64, route: F, ) -> Vec<StreamCore<G, CB::Container>>

where CB: ContainerBuilder + PushInto<D2>, CB::Container: Data, F: FnMut(C::Item<'_>) -> (u64, D2) + 'static,

Produces parts output streams, containing records produced and assigned by route.

impl<G: Scope, C: Container + Data> Probe<G, C> for StreamCore<G, C>

fn probe(&self) -> Handle<G::Timestamp>

Constructs a progress probe which indicates which timestamps have elapsed at the operator.

fn probe_with(&self, handle: &Handle<G::Timestamp>) -> StreamCore<G, C>

Inserts a progress probe in a stream.

impl<S: Scope, C: Container + Data> Reclock<S> for StreamCore<S, C>

fn reclock<TC: Container + Data>( &self, clock: &StreamCore<S, TC>, ) -> StreamCore<S, C>

Delays records until an input is observed on the clock input.

impl<S: Scope, C: Container + Data> SharedStream<S, C> for StreamCore<S, C>

fn shared(&self) -> StreamCore<S, Rc<C>>

Convert a stream into a stream of shared data