147 lines
3.7 KiB
Rust
147 lines
3.7 KiB
Rust
extern crate conduit_admin as admin;
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extern crate conduit_core as conduit;
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extern crate conduit_service as service;
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use std::{
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sync::{atomic::Ordering, Arc},
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time::Duration,
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};
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use axum_server::Handle as ServerHandle;
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use conduit::{debug, debug_error, debug_info, error, info, Error, Result, Server};
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use service::Services;
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use tokio::{
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sync::broadcast::{self, Sender},
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task::JoinHandle,
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};
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use crate::serve;
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/// Main loop base
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#[tracing::instrument(skip_all)]
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pub(crate) async fn run(services: Arc<Services>) -> Result<()> {
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let server = &services.server;
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debug!("Start");
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// Install the admin room callback here for now
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admin::init(&services.admin).await;
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// Setup shutdown/signal handling
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let handle = ServerHandle::new();
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let (tx, _) = broadcast::channel::<()>(1);
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let sigs = server
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.runtime()
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.spawn(signal(server.clone(), tx.clone(), handle.clone()));
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let mut listener = server
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.runtime()
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.spawn(serve::serve(services.clone(), handle.clone(), tx.subscribe()));
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// Focal point
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debug!("Running");
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let res = tokio::select! {
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res = &mut listener => res.map_err(Error::from).unwrap_or_else(Err),
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res = services.poll() => handle_services_poll(server, res, listener).await,
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};
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// Join the signal handler before we leave.
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sigs.abort();
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_ = sigs.await;
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// Remove the admin room callback
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admin::fini(&services.admin).await;
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debug_info!("Finish");
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res
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}
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/// Async initializations
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#[tracing::instrument(skip_all)]
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pub(crate) async fn start(server: Arc<Server>) -> Result<Arc<Services>> {
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debug!("Starting...");
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let services = Services::build(server).await?.start().await?;
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#[cfg(feature = "systemd")]
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sd_notify::notify(true, &[sd_notify::NotifyState::Ready]).expect("failed to notify systemd of ready state");
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debug!("Started");
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Ok(services)
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}
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/// Async destructions
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#[tracing::instrument(skip_all)]
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pub(crate) async fn stop(services: Arc<Services>) -> Result<()> {
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debug!("Shutting down...");
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// Wait for all completions before dropping or we'll lose them to the module
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// unload and explode.
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services.stop().await;
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if let Err(services) = Arc::try_unwrap(services) {
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debug_error!(
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"{} dangling references to Services after shutdown",
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Arc::strong_count(&services)
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);
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}
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debug!("Cleaning up...");
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#[cfg(feature = "systemd")]
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sd_notify::notify(true, &[sd_notify::NotifyState::Stopping]).expect("failed to notify systemd of stopping state");
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info!("Shutdown complete.");
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Ok(())
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}
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#[tracing::instrument(skip_all)]
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async fn signal(server: Arc<Server>, tx: Sender<()>, handle: axum_server::Handle) {
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loop {
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let sig: &'static str = server
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.signal
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.subscribe()
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.recv()
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.await
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.expect("channel error");
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if !server.running() {
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handle_shutdown(&server, &tx, &handle, sig).await;
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break;
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}
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}
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}
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async fn handle_shutdown(server: &Arc<Server>, tx: &Sender<()>, handle: &axum_server::Handle, sig: &str) {
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debug!("Received signal {sig}");
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if let Err(e) = tx.send(()) {
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error!("failed sending shutdown transaction to channel: {e}");
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}
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let timeout = Duration::from_secs(36);
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debug!(
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?timeout,
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spawn_active = ?server.metrics.requests_spawn_active.load(Ordering::Relaxed),
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handle_active = ?server.metrics.requests_handle_active.load(Ordering::Relaxed),
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"Notifying for graceful shutdown"
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);
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handle.graceful_shutdown(Some(timeout));
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}
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async fn handle_services_poll(
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server: &Arc<Server>, result: Result<()>, listener: JoinHandle<Result<()>>,
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) -> Result<()> {
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debug!("Service manager finished: {result:?}");
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if server.running() {
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if let Err(e) = server.shutdown() {
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error!("Failed to send shutdown signal: {e}");
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}
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}
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if let Err(e) = listener.await {
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error!("Client listener task finished with error: {e}");
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}
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result
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}
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