64 lines
2.5 KiB
Rust
64 lines
2.5 KiB
Rust
use std::convert::TryFrom;
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use std::sync::Arc;
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use syndicate::actor::*;
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use syndicate::enclose;
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use syndicate::supervise::{Supervisor, SupervisorConfiguration};
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use tokio::net::TcpListener;
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use crate::language::language;
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use crate::lifecycle;
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use crate::protocol::detect_protocol;
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use crate::schemas::internal_services::TcpRelayListener;
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use syndicate_macros::during;
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pub fn on_demand(t: &mut Activation, ds: Arc<Cap>) {
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t.spawn(syndicate::name!("tcp_relay_listener"), move |t| {
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Ok(during!(t, ds, language(), <run-service $spec: TcpRelayListener>, |t| {
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Supervisor::start(
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t,
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syndicate::name!(parent: None, "relay", addr = ?spec),
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SupervisorConfiguration::default(),
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enclose!((ds, spec) lifecycle::updater(ds, spec)),
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enclose!((ds) move |t| enclose!((ds, spec) run(t, ds, spec))))
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}))
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});
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}
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fn run(t: &mut Activation, ds: Arc<Cap>, spec: TcpRelayListener) -> ActorResult {
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lifecycle::terminate_on_service_restart(t, &ds, &spec);
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let host = spec.addr.host.clone();
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let port = u16::try_from(&spec.addr.port).map_err(|_| "Invalid TCP port number")?;
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let parent_span = tracing::Span::current();
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let facet = t.facet.clone();
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t.linked_task(syndicate::name!("listener"), async move {
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let listen_addr = format!("{}:{}", host, port);
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let listener = TcpListener::bind(listen_addr).await?;
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if !facet.activate(Account::new(syndicate::name!("readiness")), |t| {
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tracing::info!("listening");
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ds.assert(t, language(), &lifecycle::ready(&spec));
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Ok(())
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}).is_success() { return Ok(LinkedTaskTermination::Normal); }
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loop {
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let (stream, addr) = listener.accept().await?;
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let gatekeeper = spec.gatekeeper.clone();
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let name = syndicate::name!(parent: parent_span.clone(), "conn");
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if !facet.activate(Account::new(name.clone()), move |t| {
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t.spawn(name, move |t| {
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Ok(t.linked_task(tracing::Span::current(), {
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let facet = t.facet.clone();
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async move {
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detect_protocol(facet, stream, gatekeeper, addr).await?;
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Ok(LinkedTaskTermination::KeepFacet)
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}
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}))
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});
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Ok(())
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}).is_success() { return Ok(LinkedTaskTermination::Normal); }
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}
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});
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Ok(())
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}
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