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use dataflow::operators::generic::{Notificator, FrontierNotificator};
use dataflow::channels::pushers::Tee;
use dataflow::channels::pact::ParallelizationContract;
use dataflow::operators::generic::Operator as GenericOperator;
use dataflow::operators::generic::handles::{InputHandle, OutputHandle};
use ::Data;
use dataflow::{Stream, Scope};
pub trait Unary<G: Scope, D1: Data> {
fn unary_stream<D2, L, P> (&self, pact: P, name: &str, logic: L) -> Stream<G, D2>
where
D2: Data,
L: FnMut(&mut InputHandle<G::Timestamp, D1, P::Puller>,
&mut OutputHandle<G::Timestamp, D2, Tee<G::Timestamp, D2>>)+'static,
P: ParallelizationContract<G::Timestamp, D1>;
fn unary_notify<D2, L, P>(&self, pact: P, name: &str, init: Vec<G::Timestamp>, logic: L) -> Stream<G, D2>
where
D2: Data,
L: FnMut(&mut InputHandle<G::Timestamp, D1, P::Puller>,
&mut OutputHandle<G::Timestamp, D2, Tee<G::Timestamp, D2>>,
&mut Notificator<G::Timestamp>)+'static,
P: ParallelizationContract<G::Timestamp, D1>;
}
impl<G: Scope, D1: Data> Unary<G, D1> for Stream<G, D1> {
fn unary_notify<D2: Data,
L: FnMut(&mut InputHandle<G::Timestamp, D1, P::Puller>,
&mut OutputHandle<G::Timestamp, D2, Tee<G::Timestamp, D2>>,
&mut Notificator<G::Timestamp>)+'static,
P: ParallelizationContract<G::Timestamp, D1>>
(&self, pact: P, name: &str, init: Vec<G::Timestamp>, mut logic: L) -> Stream<G, D2> {
self.unary_frontier(pact, name, |capability| {
let mut notificator = FrontierNotificator::new();
for time in init {
notificator.notify_at(capability.delayed(&time));
}
move |input, output| {
let frontier = &[input.frontier()];
let notificator = &mut Notificator::new(frontier, &mut notificator);
logic(&mut input.handle, output, notificator);
}
})
}
fn unary_stream<D2: Data,
L: FnMut(&mut InputHandle<G::Timestamp, D1, P::Puller>,
&mut OutputHandle<G::Timestamp, D2, Tee<G::Timestamp, D2>>)+'static,
P: ParallelizationContract<G::Timestamp, D1>>
(&self, pact: P, name: &str, logic: L) -> Stream<G, D2> {
self.unary(pact, name, |_| logic)
}
}