Mercurial > templog

annotate rust/src/fridge.rs @ 594:aff50ee77252 rust

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
rust working better now with streams and sinks.
author Matt Johnston <matt@ucc.asn.au>
date Wed, 04 Jan 2017 17:18:44 +0800
parents bf138339d20a
children e87655ed8429
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
1 extern crate futures;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
2 extern crate tokio_core;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
3
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
4 use std;
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
5 use std::io;
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
6 use std::mem;
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
7 use std::time::Duration;
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
8
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
9 use futures::{Future,future,Sink,Stream};
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
10 use tokio_core::reactor::{Timeout,Handle};
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
11 use futures::sync::{mpsc};
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
12
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 use types::*;
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
15 #[derive(Debug)]
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
16 pub enum Message {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
17 Sensor {wort: Option<f32>, fridge: Option<f32>},
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
18 Params (Params),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
19 Tick(u64),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
20 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
21
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
22 pub struct Fridge {
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
23 params: Params,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
24 temp_wort: Option<f32>,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
25 temp_fridge: Option<f32>,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
26
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
27 // Timeouts to wake ourselves up again
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
28 handle: Handle,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
29 timeout_s: mpsc::Sender<u64>,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
30 timeout_r: Option<mpsc::Receiver<u64>>,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
31 ticker: u64,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
32 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
33
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
34 impl Sink for Fridge {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
35
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
36 type SinkItem = Message;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
37 type SinkError = std::io::Error;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
38
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
39 fn start_send(&mut self, msg: Message)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
40 -> futures::StartSend<Self::SinkItem, Self::SinkError> {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
41 self.process_msg(msg);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
42 Ok(futures::AsyncSink::Ready)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
43 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
44
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
45 fn poll_complete(&mut self) -> futures::Poll<(), Self::SinkError> {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
46 Ok(futures::Async::Ready(()))
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
47 }
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48 }
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
50 impl Fridge {
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
51 pub fn new(p: Params, handle: &Handle) -> Fridge {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
52 let (s, r) = mpsc::channel(1);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
53 let mut f = Fridge {
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
54 params: p,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
55 temp_wort: None,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
56 temp_fridge: None,
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
57
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
58 handle: handle.clone(),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
59 timeout_s: s,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
60 timeout_r: Some(r),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
61 ticker: 0,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
62 };
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
63 f.tick();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
64 f
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
65 }
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
66
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
67 /// Returns a stream of timeouts for fridge, waking when next necessary
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
68 pub fn timeouts(&mut self)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
69 -> Box<Stream<Item=Message, Error=io::Error>> {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
70 mem::replace(&mut self.timeout_r, None)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
71 .expect("NumberWatcher::timeouts() can only be called once")
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
72 .map(|v| Message::Tick(v))
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
73 .map_err(|_| io::Error::new(io::ErrorKind::Other, "Something wrong with watcher timeout channel"))
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
74 .boxed()
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
75 }
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
76
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
77 fn next_wakeup(&self) -> Duration {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
78 let millis = 400;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
79 let dur = Duration::from_millis(millis);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
80 dur
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
81 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
82
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
83 fn tick(&mut self) {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
84 debug!("tick");
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
85
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
86 self.send_next_timeout();
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 }
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
89 /// Sets the next self-wakeup timeout
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
90 fn send_next_timeout(&mut self) {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
91 let waker = self.timeout_s.clone();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
92 let dur = self.next_wakeup();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
93 debug!("fridge next wakeup {:?}", dur);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
94 self.ticker += 1;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
95 let v = self.ticker;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
96 let t = Timeout::new(dur, &self.handle).unwrap()
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
97 .map_err(|_| ())
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
98 .and_then(move |_| {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
99 waker.send(v)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
100 .map_err(|_| ())
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
101 })
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
102 .map(|_| ());
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
103 self.handle.spawn(t);
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
104 }
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
105
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
106 fn process_msg(&mut self, msg: Message)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
107 -> Box<Future<Item=(), Error=()>> {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
108 debug!("process_msg {:?}", msg);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
109 match msg {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
110 Message::Sensor{wort, fridge} => self.update_sensor(wort, fridge),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
111 Message::Params(p) => self.update_params(p),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
112 Message::Tick(v) => if v == self.ticker {self.tick()},
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
113 };
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
114 future::ok::<(),()>(()).boxed()
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
115 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
116
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
117 pub fn update_params(&mut self, p: Params) {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
118 self.params = p;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
119 println!("fridge set_params {:?}", self.params);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
120
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
121 self.tick();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
122 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
123
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
124 pub fn update_sensor(&mut self, wort: Option<f32>, fridge: Option<f32>) {
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
125 self.temp_wort = wort;
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
126 self.temp_fridge = fridge;
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
127
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
128 self.tick();
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129 }
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 }