85 lines
3.2 KiB
Rust
85 lines
3.2 KiB
Rust
use preserves_schema::Codec;
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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::preserves::rec;
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use syndicate::preserves::value::NestedValue;
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use syndicate::supervise::{Supervisor, SupervisorConfiguration};
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use syndicate::trace;
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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(Some(AnyValue::symbol("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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Some(rec![AnyValue::symbol("relay"), language().unparse(&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 facet = t.facet.clone();
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let trace_collector = t.trace_collector();
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t.linked_task(Some(AnyValue::symbol("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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{
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let cause = trace_collector.as_ref().map(|_| trace::TurnCause::external("readiness"));
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let account = Account::new(Some(AnyValue::symbol("readiness")), trace_collector.clone());
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if !facet.activate(
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&account, cause, |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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})
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{
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return Ok(LinkedTaskTermination::Normal);
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}
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}
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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 = Some(rec![AnyValue::symbol("tcp"), AnyValue::new(format!("{}", &addr))]);
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let cause = trace_collector.as_ref().map(|_| trace::TurnCause::external("connect"));
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let account = Account::new(name.clone(), trace_collector.clone());
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if !facet.activate(
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&account, cause, enclose!((trace_collector) move |t| {
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t.spawn(name, move |t| {
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Ok(t.linked_task(None, {
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let facet = t.facet.clone();
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async move {
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detect_protocol(trace_collector, 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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}))
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{
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return Ok(LinkedTaskTermination::Normal);
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}
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}
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});
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Ok(())
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}
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