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use crate::Data;
use crate::dataflow::channels::pact::Pipeline;
use crate::dataflow::{Stream, Scope};
use crate::dataflow::operators::generic::Operator;
pub trait Inspect<G: Scope, D: Data> {
fn inspect(&self, mut func: impl FnMut(&D)+'static) -> Stream<G, D> {
self.inspect_batch(move |_, data| {
for datum in data.iter() { func(datum); }
})
}
fn inspect_time(&self, mut func: impl FnMut(&G::Timestamp, &D)+'static) -> Stream<G, D> {
self.inspect_batch(move |time, data| {
for datum in data.iter() {
func(&time, &datum);
}
})
}
fn inspect_batch(&self, func: impl FnMut(&G::Timestamp, &[D])+'static) -> Stream<G, D>;
}
impl<G: Scope, D: Data> Inspect<G, D> for Stream<G, D> {
fn inspect_batch(&self, mut func: impl FnMut(&G::Timestamp, &[D])+'static) -> Stream<G, D> {
let mut vector = Vec::new();
self.unary(Pipeline, "InspectBatch", move |_,_| move |input, output| {
input.for_each(|time, data| {
data.swap(&mut vector);
func(&time, &vector[..]);
output.session(&time).give_vec(&mut vector);
});
})
}
}