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use Data;
use dataflow::channels::pact::Pipeline;
use dataflow::{Stream, Scope};
use dataflow::operators::unary::Unary;
pub trait Inspect<G: Scope, D: Data> {
fn inspect<F: FnMut(&D)+'static>(&self, func: F) -> Self;
fn inspect_batch<F: FnMut(&G::Timestamp, &[D])+'static>(&self, func: F) -> Self;
}
impl<G: Scope, D: Data> Inspect<G, D> for Stream<G, D> {
fn inspect<F: FnMut(&D)+'static>(&self, mut func: F) -> Stream<G, D> {
self.unary_stream(Pipeline, "Inspect", move |input, output| {
input.for_each(|time, data| {
for datum in data.iter() { func(datum); }
output.session(&time).give_content(data);
});
})
}
fn inspect_batch<F: FnMut(&G::Timestamp, &[D])+'static>(&self, mut func: F) -> Stream<G, D> {
self.unary_stream(Pipeline, "InspectBatch", move |input, output| {
input.for_each(|time, data| {
func(&time, &data[..]);
output.session(&time).give_content(data);
});
})
}
}