annotate rust/src/fridge.rs @ 600:9c76f3cf01ea rust

slightly less ugly
author Matt Johnston <matt@ucc.asn.au>
date Tue, 07 Feb 2017 22:57:29 +0800
parents a440eafa84a9
children 8c21df3711e2
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;
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
7 use std::time::{Duration,Instant};
593
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
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
13 use config::Config;
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 use types::*;
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
16 #[derive(Debug)]
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
17 pub enum Message {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
18 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
19 Params (Params),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
20 Tick(u64),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
21 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
22
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
23 pub struct Fridge {
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
24 config: Config,
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
25 params: Params,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
26 temp_wort: Option<f32>,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
27 temp_fridge: Option<f32>,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
28
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
29 // 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
30 handle: Handle,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
31 timeout_s: mpsc::Sender<u64>,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
32 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
33 ticker: u64,
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
34 last_off_time: Instant,
594
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
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
37 impl Sink for Fridge {
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 type SinkItem = Message;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
40 type SinkError = std::io::Error;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
41
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
42 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
43 -> 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
44 self.process_msg(msg);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
45 Ok(futures::AsyncSink::Ready)
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
46 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
47
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
48 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
49 Ok(futures::Async::Ready(()))
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
50 }
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51 }
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
53 impl Fridge {
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
54 pub fn new(config: &Config, nowait: bool, p: Params, handle: &Handle) -> Fridge {
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
55 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
56 let mut f = Fridge {
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
57 config: config.clone(),
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
58 params: p,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
59 temp_wort: None,
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
60 temp_fridge: None,
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
61
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
62 handle: handle.clone(),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
63 timeout_s: s,
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
64 timeout_r: Some(r),
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
65 ticker: 0,
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
66 last_off_time: Instant::now(),
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
67 };
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
68 if nowait {
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
69 f.last_off_time -= Duration::new(config.FRIDGE_DELAY, 100);
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
70 }
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
71 f.tick();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
72 f
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
73 }
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
74
597
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
75 /// The fridge needs to periodically wake itself up, the returned
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
76 // stream of Tick messages does so.
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
77 /// Examples of wakeups events are
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
78 ///
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
79 /// * overshoot calculation
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
80 /// * minimum fridge-off time
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
81 /// * invalid wort timeout
a440eafa84a9 progress for debug
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
82 pub fn wakeups(&mut self)
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
83 -> 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
84 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
85 .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
86 .map(|v| Message::Tick(v))
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
87 .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
88 .boxed()
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
89 }
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
90
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
91 fn next_wakeup(&self) -> Duration {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
92 let millis = 400;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
93 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
94 dur
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
95 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
96
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
97 fn tick(&mut self) {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
98 debug!("tick");
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
99
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
100 self.send_next_timeout();
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 }
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
103 /// 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
104 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
105 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
106 let dur = self.next_wakeup();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
107 debug!("fridge next wakeup {:?}", dur);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
108 self.ticker += 1;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
109 let v = self.ticker;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
110 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
111 .map_err(|_| ())
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
112 .and_then(move |_| {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
113 waker.send(v)
595
e87655ed8429 add config
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
114 .map_err(|e| {
e87655ed8429 add config
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
115 warn!("Send error in tick(): {}", e.to_string());
e87655ed8429 add config
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
116 ()
e87655ed8429 add config
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
117 })
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
118 })
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
119 .map(|_| ());
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
120 self.handle.spawn(t);
593
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
121 }
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
122
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
123 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
124 -> Box<Future<Item=(), Error=()>> {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
125 debug!("process_msg {:?}", msg);
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
126 match msg {
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
127 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
128 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
129 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
130 };
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
131 future::ok::<(),()>(()).boxed()
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
132 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
133
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
134 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
135 self.params = p;
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
136 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
137
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
138 self.tick();
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
139 }
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
140
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
141 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
142 self.temp_wort = wort;
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
143 self.temp_fridge = fridge;
bf138339d20a fiddling with timeouts and closures
Matt Johnston <matt@ucc.asn.au>
parents: 592
diff changeset
144
594
aff50ee77252 rust working better now with streams and sinks.
Matt Johnston <matt@ucc.asn.au>
parents: 593
diff changeset
145 self.tick();
592
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 }
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147
03b48ec0bb03 fridge, types, configwaiter
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
148 }