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use std::rc::Rc;
use std::cell::RefCell;
use std::default::Default;
use progress::frontier::Antichain;
use progress::{Operate, Timestamp};
use progress::nested::subgraph::Source;
use progress::ChangeBatch;
use Data;
use dataflow::channels::pushers::{Tee, Counter as PushCounter};
use dataflow::channels::pushers::buffer::{Buffer as PushBuffer, AutoflushSession};
use dataflow::operators::Capability;
use dataflow::operators::capability::mint as mint_capability;
use dataflow::{Stream, Scope};
pub trait UnorderedInput<G: Scope> {
fn new_unordered_input<D:Data>(&mut self) -> ((UnorderedHandle<G::Timestamp, D>, Capability<G::Timestamp>), Stream<G, D>);
}
impl<G: Scope> UnorderedInput<G> for G {
fn new_unordered_input<D:Data>(&mut self) -> ((UnorderedHandle<G::Timestamp, D>, Capability<G::Timestamp>), Stream<G, D>) {
let (output, registrar) = Tee::<G::Timestamp, D>::new();
let internal = Rc::new(RefCell::new(ChangeBatch::new()));
let cap = mint_capability(Default::default(), internal.clone());
let counter = PushCounter::new(output);
let produced = counter.produced().clone();
let helper = UnorderedHandle::new(counter);
let peers = self.peers();
let index = self.add_operator(UnorderedOperator {
internal: internal,
produced: produced,
peers: peers,
});
((helper, cap), Stream::new(Source { index: index, port: 0 }, registrar, self.clone()))
}
}
struct UnorderedOperator<T:Timestamp> {
internal: Rc<RefCell<ChangeBatch<T>>>,
produced: Rc<RefCell<ChangeBatch<T>>>,
peers: usize,
}
impl<T:Timestamp> Operate<T> for UnorderedOperator<T> {
fn name(&self) -> String { "Input".to_owned() }
fn inputs(&self) -> usize { 0 }
fn outputs(&self) -> usize { 1 }
fn get_internal_summary(&mut self) -> (Vec<Vec<Antichain<<T as Timestamp>::Summary>>>,
Vec<ChangeBatch<T>>) {
let mut internal = ChangeBatch::new();
for &(ref time, count) in self.internal.borrow_mut().iter() {
internal.update(time.clone(), count * (self.peers as i64 - 1));
}
self.internal.borrow_mut().drain_into(&mut internal);
(Vec::new(), vec![internal])
}
fn pull_internal_progress(&mut self,_consumed: &mut [ChangeBatch<T>],
internal: &mut [ChangeBatch<T>],
produced: &mut [ChangeBatch<T>]) -> bool
{
self.produced.borrow_mut().drain_into(&mut produced[0]);
self.internal.borrow_mut().drain_into(&mut internal[0]);
false
}
fn notify_me(&self) -> bool { false }
}
pub struct UnorderedHandle<T: Timestamp, D: Data> {
buffer: PushBuffer<T, D, PushCounter<T, D, Tee<T, D>>>,
}
impl<T: Timestamp, D: Data> UnorderedHandle<T, D> {
fn new(pusher: PushCounter<T, D, Tee<T, D>>) -> UnorderedHandle<T, D> {
UnorderedHandle {
buffer: PushBuffer::new(pusher),
}
}
pub fn session<'b>(&'b mut self, cap: Capability<T>) -> AutoflushSession<'b, T, D, PushCounter<T, D, Tee<T, D>>> {
self.buffer.autoflush_session(cap)
}
}
impl<T: Timestamp, D: Data> Drop for UnorderedHandle<T, D> {
fn drop(&mut self) {
}
}