Iterator stream snippet

iter-snippet.rs

        trace!("Preparing an Interval to run the requests");
        let always_defs = futures::stream::iter_ok(raw_defs.iter().cycle());
        let every_100ms = Interval::new(Instant::now(), Duration::from_millis(100));
        let zipped = every_100ms.zip(always_defs);

        tokio::spawn(zipped.map_err(|_| ()).for_each(move |(_, def)| {
            let req = def.request();
            let dest = req.sendto();
            let packet = req.packet().to_vec();
            let targ = sender.clone();
            tokio::spawn(futures::future::lazy(move || {
                targ.send((dest, packet)).wait().map(|_| ()).map_err(|_| ())
            }))
        }));