96 lines
2.2 KiB
Rust
96 lines
2.2 KiB
Rust
use std::ops::Deref;
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use std::time;
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use crossbeam_channel as chan;
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use crate::prelude::*;
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use crate::storage::RefUpdate;
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/// A service event.
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#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
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#[serde(rename_all = "kebab-case", tag = "type")]
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pub enum Event {
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RefsFetched {
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remote: NodeId,
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rid: Id,
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updated: Vec<RefUpdate>,
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},
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RefsSynced {
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remote: NodeId,
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rid: Id,
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},
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SeedDiscovered {
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rid: Id,
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nid: NodeId,
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},
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SeedDropped {
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rid: Id,
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nid: NodeId,
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},
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PeerConnected {
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nid: NodeId,
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},
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}
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/// Events feed.
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pub struct Events(chan::Receiver<Event>);
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impl IntoIterator for Events {
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type Item = Event;
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type IntoIter = chan::IntoIter<Event>;
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fn into_iter(self) -> Self::IntoIter {
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self.0.into_iter()
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}
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}
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impl From<chan::Receiver<Event>> for Events {
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fn from(value: chan::Receiver<Event>) -> Self {
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Self(value)
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}
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}
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impl Deref for Events {
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type Target = chan::Receiver<Event>;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl Events {
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/// Listen for events, and wait for the given predicate to return something,
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/// or timeout if the specified amount of time has elapsed.
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pub fn wait<F>(
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&self,
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mut f: F,
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timeout: time::Duration,
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) -> Result<Event, chan::RecvTimeoutError>
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where
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F: FnMut(&Event) -> bool,
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{
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let start = time::Instant::now();
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loop {
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if let Some(timeout) = timeout.checked_sub(start.elapsed()) {
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match self.recv_timeout(timeout) {
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Ok(event) => {
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if f(&event) {
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return Ok(event);
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}
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}
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Err(err @ chan::RecvTimeoutError::Disconnected) => {
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return Err(err);
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}
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Err(chan::RecvTimeoutError::Timeout) => {
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// Keep trying until our timeout reaches zero.
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continue;
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}
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}
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} else {
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return Err(chan::RecvTimeoutError::Timeout);
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}
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}
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}
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}
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