mirror of
https://gitlab.com/fabinfra/fabaccess/bffh.git
synced 2024-11-22 14:57:56 +01:00
Sync Actor works now
This commit is contained in:
parent
6cf4b1d078
commit
f4148d398f
132
src/actor.rs
132
src/actor.rs
@ -10,7 +10,7 @@ use futures::channel::mpsc;
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use futures_signals::signal::{Signal, MutableSignalCloned, MutableSignal, Mutable};
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use crate::db::machine::MachineState;
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use crate::registries::Actuator;
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use crate::registries::actuators::Actuator;
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use crate::config::Settings;
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use crate::error::Result;
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@ -22,88 +22,74 @@ pub struct Actor<S: Signal> {
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// of a task context. In short, using Mutable isn't possible and we would have to write our own
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// implementation of MutableSignal*'s . Preferably with the correct optimizations for our case
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// where there is only one consumer. So a mpsc channel that drops all but the last input.
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rx: mpsc::Receiver<Option<S>>
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inner: S,
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rx: mpsc::Receiver<Option<S>>,
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inner: Option<S>,
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actuator: Box<dyn Actuator + Send + Sync>,
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future: Option<Box<dyn Future<Output=()> + Unpin + Send>>,
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}
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pub fn load() {
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let s = Mutable::new(MachineState::new());
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Ok(())
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}
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#[must_use = "Signals do nothing unless polled"]
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pub struct MaybeFlatten<A: Signal, B: Signal> {
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signal: Option<A>,
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inner: Option<B>,
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}
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// Poll parent => Has inner => Poll inner => Output
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// --------------------------------------------------------
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// Some(Some(inner)) => => Some(value) => Some(value)
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// Some(Some(inner)) => => => Pending
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// Some(None) => => => Pending
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// None => Some(inner) => Some(value) => Some(value)
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// None => Some(inner) => None => None
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// None => Some(inner) => Pending => Pending
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// None => None => => None
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// Pending => Some(inner) => Some(value) => Some(value)
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// Pending => Some(inner) => None => Pending
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// Pending => Some(inner) => Pending => Pending
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// Pending => None => => Pending
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impl<A, B> Signal for MaybeFlatten<A, B>
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where A: Signal<Item=Option<B>> + Unpin,
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B: Signal + Unpin,
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{
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type Item = B::Item;
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#[inline]
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fn poll_change(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
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let mut this = &mut *self;
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let done = match this.signal.as_mut().map(|signal| Signal::poll_change(Pin::new(signal), cx)) {
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None => true,
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Some(Poll::Ready(None)) => {
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this.signal = None;
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true
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},
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Some(Poll::Ready(Some(new_inner))) => {
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this.inner = new_inner;
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false
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},
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Some(Poll::Pending) => false,
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};
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match this.inner.as_mut().map(|inner| Signal::poll_change(Pin::new(inner), cx)) {
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Some(Poll::Ready(None)) => {
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this.inner = None;
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},
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Some(poll) => {
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return poll;
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},
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None => {},
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impl<S: Signal + Unpin> Actor<S> {
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pub fn new(rx: mpsc::Receiver<Option<S>>, actuator: Box<dyn Actuator + Send + Sync>) -> Self {
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Self {
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rx: rx,
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inner: None,
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actuator: actuator,
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future: None,
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}
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}
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if done {
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Poll::Ready(None)
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pub fn wrap(actuator: Box<dyn Actuator + Send + Sync>) -> (mpsc::Sender<Option<S>>, Self) {
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let (tx, rx) = mpsc::channel(1);
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(tx, Self::new(rx, actuator))
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}
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}
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impl<S: Signal<Item=MachineState> + Unpin> Future for Actor<S> {
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type Output = ();
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fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
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let mut this = &mut *self;
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let mut done = false; // Is the channel with new state-signals exhausted?
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// Update the signal we're polling from, if there is an update that is.
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match Stream::poll_next(Pin::new(&mut this.rx), cx) {
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Poll::Ready(None) => done = true,
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Poll::Ready(Some(new_signal)) => this.inner = new_signal,
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Poll::Pending => { },
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}
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// Poll the `apply` future.
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match this.future.as_mut().map(|future| Future::poll(Pin::new(future), cx)) {
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None => { }
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Some(Poll::Ready(_)) => this.future = None,
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Some(Poll::Pending) => return Poll::Pending,
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}
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// Poll the signal and apply all changes that happen to the inner Actuator
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match this.inner.as_mut().map(|inner| Signal::poll_change(Pin::new(inner), cx)) {
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None => Poll::Pending,
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Some(Poll::Pending) => Poll::Pending,
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Some(Poll::Ready(None)) => {
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this.inner = None;
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if done {
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Poll::Ready(())
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} else {
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Poll::Pending
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}
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},
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Some(Poll::Ready(Some(state))) => {
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this.actuator.apply(state);
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Poll::Pending
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}
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use futures_test::*;
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use futures_signals::signal::Signal;
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pub fn load<S: Signal<Item=MachineState> + Unpin>() -> Result<(mpsc::Sender<Option<S>>, Actor<S>)> {
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let d = Box::new(crate::registries::actuators::Dummy);
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let a = Actor::wrap(d);
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#[test]
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fn load_test() {
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let (a, s, m) = super::load().unwrap();
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let cx = task::panic_context();
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a.signal.poll_change(&mut cx);
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}
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Ok(a)
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}
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@ -27,8 +27,6 @@ use smol::channel::{Receiver, Sender};
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use futures::{Future, Stream, StreamExt};
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use futures_signals::signal::*;
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use crate::registries::StatusSignal;
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use crate::machine::MachineDescription;
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use crate::db::user::UserId;
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27
src/main.rs
27
src/main.rs
@ -135,27 +135,32 @@ fn maybe(matches: clap::ArgMatches, log: Arc<Logger>) -> Result<(), Error> {
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error!(log, "Loading is currently not implemented");
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Ok(())
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} else {
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let db = db::Databases::new(&log, &config)?;
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// TODO: Spawn api connections on their own (non-main) thread, use the main thread to
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// handle signals (a cli if stdin is not closed?) and make it stop and clean up all threads
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// when bffh should exit
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let machines = machine::load(&config)?;
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let actors = actor::load()?;
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let initiators = initiator::load(&config)?;
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//let machines = machine::load(&config)?;
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//let initiators = initiator::load(&config)?;
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let ex = Executor::new();
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for i in initiators.into_iter() {
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ex.spawn(i.run());
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}
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let m = futures_signals::signal::Mutable::new(crate::db::machine::MachineState::new());
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let (mut tx, actor) = actor::load()?;
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// TODO HERE: restore connections between initiators, machines, actors
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// Like so
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tx.try_send(Some(m.signal_cloned())).unwrap();
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// TODO HERE: Spawn all actors & inits
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// Like so
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ex.spawn(actor);
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let (signal, shutdown) = async_channel::bounded::<()>(1);
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easy_parallel::Parallel::new()
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.each(0..4, |_| smol::block_on(ex.run(shutdown.recv())));
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let db = db::Databases::new(&log, &config)?;
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// TODO: Spawn api connections on their own (non-main) thread, use the main thread to
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// handle signals (a cli if stdin is not closed?) and make it stop and clean up all threads
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// when bffh should exit
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server::serve_api_connections(log.clone(), config, db)
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// Signal is dropped here, stopping all executor threads as well.
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}
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@ -1,9 +1,9 @@
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use slog::Logger;
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use crate::config::Settings;
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use crate::registries::{Registries, Actuator, ActBox, StatusSignal};
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use crate::error::Result;
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use crate::db::machine::Status;
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use crate::registries::Registries;
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use std::pin::Pin;
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use futures::prelude::*;
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@ -19,100 +19,5 @@ use paho_mqtt as mqtt;
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// entirety. This works reasonably enough for this static modules here but if we do dynamic loading
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// via dlopen(), lua API, python API etc it will not.
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pub async fn run<S: Spawn>(log: Logger, config: Settings, registries: Registries, spawner: S) {
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let rx = registries.actuators.register("shelly".to_string()).await;
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let mut shelly = Shelly::new(log, config, rx).await;
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let f = shelly.for_each(|f| f);
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spawner.spawn_obj(FutureObj::from(Box::pin(f)));
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}
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/// An actuator for all Shellies connected listening on one MQTT broker
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///
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/// This actuator can power toggle an arbitrariy named shelly on the broker it is connected to. If
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/// you need to toggle shellies on multiple brokers you need multiple instanced of this actuator.
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struct Shelly {
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log: Logger,
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sigchan: mpsc::Receiver<StatusSignal>,
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signal: Option<StatusSignal>,
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waker: Option<Waker>,
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name: String,
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client: mqtt::AsyncClient,
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}
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impl Shelly {
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// Can't use Error, it's not Send. fabinfra/fabaccess/bffh#7
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pub async fn new(log: Logger, config: Settings, sigchan: mpsc::Receiver<StatusSignal>) -> Self {
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let client = mqtt::AsyncClient::new(config.shelly.unwrap().mqtt_url).unwrap();
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let o = client.connect(mqtt::ConnectOptions::new()).await.unwrap();
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println!("{:?}", o);
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let name = "test".to_string();
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let signal: Option<StatusSignal> = None;
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let waker = None;
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Shelly { log, sigchan, signal, waker, name, client }
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}
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}
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impl Actuator for Shelly {
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fn subscribe(&mut self, signal: StatusSignal) {
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self.signal.replace(signal);
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if let Some(waker) = self.waker.take() {
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waker.wake();
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}
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}
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}
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impl Stream for Shelly {
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type Item = future::BoxFuture<'static, ()>;
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
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let unpin = Pin::into_inner(self);
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info!(unpin.log, "tick {}", unpin.signal.is_some());
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if let Poll::Ready(v) = Stream::poll_next(Pin::new(&mut unpin.sigchan), cx) {
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if let Some(s) = v {
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// We have received a new signal to use
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unpin.signal.replace(s);
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// We use `if let` instead of .and_then because we want the waker to be dropped
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// afterwards. It's only there to ensure the future is called when a signal is
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// installed the first time
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// TODO probably don't need that here because we're polling it either way directly
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// afterwards, eh?
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if let Some(waker) = unpin.waker.take() {
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waker.wake();
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}
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} else {
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info!(unpin.log, "bye");
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// This means that the sending end was dropped, so we shut down
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unpin.signal.take();
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unpin.waker.take();
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return Poll::Ready(None);
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}
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}
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if let Some(ref mut s) = unpin.signal {
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if let Some(status) = ready!(Signal::poll_change(Pin::new(s), cx)) {
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info!(unpin.log, "Machine Status changed: {:?}", status);
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let topic = format!("shellies/{}/relay/0/command", unpin.name);
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let pl = match status {
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Status::InUse(_, _) => "on",
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_ => "off",
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};
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let msg = mqtt::Message::new(topic, pl, 0);
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let f = unpin.client.publish(msg).map(|_| ());
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return Poll::Ready(Some(Box::pin(f)));
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}
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} else {
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info!(unpin.log, "I ain't got no signal son");
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unpin.waker.replace(cx.waker().clone());
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}
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Poll::Pending
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}
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}
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@ -1,9 +1,7 @@
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use std::sync::Arc;
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mod actuators;
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mod sensors;
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pub use actuators::{Actuator, ActBox, StatusSignal};
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pub mod actuators;
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pub mod sensors;
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#[derive(Clone)]
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/// BFFH registries
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@ -11,14 +9,12 @@ pub use actuators::{Actuator, ActBox, StatusSignal};
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/// This struct is only a reference to the underlying registries - cloning it will generate a new
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/// reference, not clone the registries
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pub struct Registries {
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pub actuators: actuators::Actuators,
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pub sensors: sensors::Sensors,
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}
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impl Registries {
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pub fn new() -> Self {
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Registries {
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actuators: actuators::Actuators::new(),
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sensors: sensors::Sensors::new(),
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}
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}
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@ -10,76 +10,18 @@ use futures::channel::mpsc;
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use futures::task::{Context, Poll, Spawn};
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use futures_signals::signal::Signal;
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use crate::db::machine::Status;
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use crate::db::machine::MachineState;
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use std::collections::HashMap;
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#[derive(Clone)]
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pub struct Actuators {
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inner: Arc<RwLock<Inner>>,
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pub trait Actuator {
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fn apply(&mut self, state: MachineState);
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}
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pub type ActBox = Box<dyn Actuator + Sync + Send + Unpin>;
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type Inner = HashMap<String, mpsc::Sender<StatusSignal>>;
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impl Actuators {
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pub fn new() -> Self {
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Actuators {
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inner: Arc::new(RwLock::new(Inner::new()))
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}
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}
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pub async fn register(&self, name: String) -> mpsc::Receiver<StatusSignal> {
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let (tx, rx) = mpsc::channel(1);
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let mut wlock = self.inner.write().await;
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// TODO: Log an error or something if that name was already taken
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wlock.insert(name, tx);
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return rx;
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}
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pub async fn subscribe(&mut self, name: String, signal: StatusSignal) {
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let mut wlock = self.inner.write().await;
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if let Some(tx) = wlock.get_mut(&name) {
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tx.send(signal).await;
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}
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}
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}
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pub type StatusSignal = Pin<Box<dyn Signal<Item = Status> + Send + Sync>>;
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pub trait Actuator: Stream<Item = future::BoxFuture<'static, ()>> {
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fn subscribe(&mut self, signal: StatusSignal);
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}
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// This is merely a proof that Actuator *can* be implemented on a finite, known type. Yay for type
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// systems with halting problems.
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struct Dummy {
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log: Logger,
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sigchan: mpsc::Receiver<StatusSignal>,
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signal: Option<StatusSignal>,
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}
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pub struct Dummy;
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impl Actuator for Dummy {
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fn subscribe(&mut self, signal: StatusSignal) {
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self.signal.replace(signal);
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}
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}
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impl Stream for Dummy {
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type Item = future::BoxFuture<'static, ()>;
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
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let unpin = Pin::into_inner(self);
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if let Some(ref mut s) = unpin.signal {
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let status = ready!(Signal::poll_change(Pin::new(s), cx));
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info!(unpin.log, "Dummy actuator would set status to {:?}, but is a Dummy", status);
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Poll::Ready(Some(Box::pin(futures::future::ready(()))))
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} else {
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Poll::Pending
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}
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fn apply(&mut self, state: MachineState) {
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println!("New state for dummy actuator: {:?}", state);
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}
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}
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