1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

use crate::message::*;
use crate::supervisor;
use crate::value::Value;
use crate::Result;
use chrono::Local;
use crossbeam_channel::Sender;
use serde::Deserialize;
use std::thread;
use std::time::Duration;

#[derive(Deserialize, Debug, Clone)]
pub struct Settings {
    /// Interval in milliseconds.
    #[serde(default = "default_interval_ms")]
    pub interval_ms: u64,
}

fn default_interval_ms() -> u64 {
    1000
}

pub fn spawn(service_id: &str, settings: &Settings, tx: &Sender<Message>) -> Result<Vec<Sender<Message>>> {
    let service_id = service_id.to_string();
    let interval = Duration::from_millis(settings.interval_ms);
    let tx = tx.clone();

    supervisor::spawn(format!("my-iot::clock::{}", service_id), tx.clone(), move || {
        let mut counter = 1;
        loop {
            tx.send(Message {
                type_: Type::Actual,
                reading: Reading {
                    sensor: service_id.to_string(),
                    value: Value::Counter(counter),
                    timestamp: Local::now(),
                },
            })
            .unwrap();

            counter += 1;
            thread::sleep(interval);
        }
    })?;

    Ok(vec![])
}