2022-01-19 13:40:50 +00:00
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//! Records *describing* actions committed at the end of a turn and
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//! events triggering the start of a turn. These are not the actions
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//! or events themselves: they are reflective information on the
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//! action of the system, enough to reconstruct interesting
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//! projections of system activity.
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pub use super::schemas::trace::*;
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use preserves::value::NestedValue;
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use preserves::value::Writer;
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use preserves_schema::Codec;
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use super::actor::{self, AnyValue, Ref, Cap};
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use super::language;
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use std::sync::Arc;
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use std::time::SystemTime;
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use tokio::select;
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use tokio::sync::mpsc::{unbounded_channel, UnboundedSender};
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#[derive(Debug, Clone)]
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pub struct TraceCollector {
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pub tx: UnboundedSender<TraceEntry>,
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}
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impl<M> From<&Ref<M>> for Target {
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fn from(v: &Ref<M>) -> Target {
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Target {
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2023-11-09 09:04:29 +00:00
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actor: ActorId(AnyValue::new(v.mailbox.actor.actor_id)),
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2022-01-19 13:40:50 +00:00
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facet: FacetId(AnyValue::new(u64::from(v.facet_id))),
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oid: Oid(AnyValue::new(v.oid())),
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}
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}
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}
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impl<M: std::fmt::Debug> From<&M> for AssertionDescription {
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default fn from(v: &M) -> Self {
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Self::Opaque { description: AnyValue::new(format!("{:?}", v)) }
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}
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}
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impl From<&AnyValue> for AssertionDescription {
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fn from(v: &AnyValue) -> Self {
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Self::Value { value: v.clone() }
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}
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}
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impl TraceCollector {
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pub fn record(&self, id: actor::ActorId, a: ActorActivation) {
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let _ = self.tx.send(TraceEntry {
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timestamp: SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)
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.expect("Time after Unix epoch").as_secs_f64().into(),
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actor: ActorId(AnyValue::new(id)),
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item: a,
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});
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}
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}
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impl TurnDescription {
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pub fn new(activation_id: u64, cause: TurnCause) -> Self {
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Self {
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id: TurnId(AnyValue::new(activation_id)),
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cause,
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actions: Vec::new(),
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}
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}
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pub fn record(&mut self, a: ActionDescription) {
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self.actions.push(a)
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}
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pub fn take(&mut self) -> Self {
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Self {
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id: self.id.clone(),
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cause: self.cause.clone(),
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actions: std::mem::take(&mut self.actions),
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}
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}
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}
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impl TurnCause {
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pub fn external(description: &str) -> Self {
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Self::External { description: AnyValue::new(description) }
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}
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}
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struct CapEncoder;
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impl preserves::value::DomainEncode<Arc<Cap>> for CapEncoder {
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fn encode_embedded<W: Writer>(
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&mut self,
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w: &mut W,
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d: &Arc<Cap>,
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) -> std::io::Result<()> {
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w.write_string(&d.debug_str())
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}
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}
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pub enum CollectorEvent {
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Event(TraceEntry),
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PeriodicFlush,
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}
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impl TraceCollector {
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pub fn new<F: 'static + Send + FnMut(CollectorEvent)>(mut f: F) -> TraceCollector {
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let (tx, mut rx) = unbounded_channel::<TraceEntry>();
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tokio::spawn(async move {
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2022-01-20 09:08:49 +00:00
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let mut timer = tokio::time::interval(std::time::Duration::from_millis(100));
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2022-01-19 13:40:50 +00:00
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loop {
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select! {
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maybe_entry = rx.recv() => {
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match maybe_entry {
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None => break,
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Some(entry) => {
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tracing::trace!(?entry);
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f(CollectorEvent::Event(entry));
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}
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}
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},
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_ = timer.tick() => f(CollectorEvent::PeriodicFlush),
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}
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}
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});
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TraceCollector { tx }
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}
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pub fn ascii<W: 'static + std::io::Write + Send>(w: W) -> TraceCollector {
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let mut writer = preserves::value::TextWriter::new(w);
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Self::new(move |event| match event {
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CollectorEvent::Event(entry) => {
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writer.write(&mut CapEncoder, &language().unparse(&entry))
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.expect("failed to write TraceCollector entry");
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writer.borrow_write().write_all(b"\n")
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.expect("failed to write TraceCollector newline");
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},
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CollectorEvent::PeriodicFlush =>
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writer.flush().expect("failed to flush TraceCollector output"),
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})
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}
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pub fn packed<W: 'static + std::io::Write + Send>(w: W) -> TraceCollector {
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let mut writer = preserves::value::PackedWriter::new(w);
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Self::new(move |event| match event {
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CollectorEvent::Event(entry) =>
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writer.write(&mut CapEncoder, &language().unparse(&entry))
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.expect("failed to write TraceCollector entry"),
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CollectorEvent::PeriodicFlush =>
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writer.flush().expect("failed to flush TraceCollector output"),
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})
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}
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}
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impl From<actor::Name> for Name {
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fn from(v: actor::Name) -> Name {
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match v {
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None => Name::Anonymous,
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Some(n) => Name::Named { name: n.clone() },
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}
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}
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}
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