98 lines
3.2 KiB
Rust
98 lines
3.2 KiB
Rust
//! Shared registry of Pods spawned by this Pod.
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//!
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//! `SpawnPod` writes here; the pod-comm tools (`SendToPod`,
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//! `ReadPodOutput`, `StopPod`, `ListPods`) read and mutate the same
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//! instance. Persisted to `spawned_pods.json` in the spawner's runtime
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//! dir so a restarted spawner rebuilds its view from disk (future work
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//! — today only write-through is implemented).
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//!
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//! `ReadPodOutput` additionally owns a per-spawned-pod cursor here so
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//! two consecutive reads yield only new assistant text. The cursor is
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//! an item-index into the child's history; push-only history makes
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//! index stable across reads.
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//!
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//! The registry stays in-memory only for this Pod's lifetime — cursors
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//! intentionally do not persist.
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use std::collections::HashMap;
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use std::io;
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use std::sync::Arc;
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use tokio::sync::Mutex;
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use crate::runtime::dir::{RuntimeDir, SpawnedPodRecord};
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pub struct SpawnedPodRegistry {
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records: Mutex<Vec<SpawnedPodRecord>>,
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cursors: Mutex<HashMap<String, usize>>,
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runtime_dir: Arc<RuntimeDir>,
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}
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impl SpawnedPodRegistry {
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pub fn new(runtime_dir: Arc<RuntimeDir>) -> Arc<Self> {
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Arc::new(Self {
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records: Mutex::new(Vec::new()),
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cursors: Mutex::new(HashMap::new()),
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runtime_dir,
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})
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}
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/// Append a new record and persist the full list. Returns an I/O
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/// error if the persisted write fails; the in-memory state is still
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/// updated in that case — the next successful write will reconcile.
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pub async fn add(&self, record: SpawnedPodRecord) -> io::Result<()> {
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let mut records = self.records.lock().await;
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records.push(record);
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self.runtime_dir
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.write_spawned_pods(records.as_slice())
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.await
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}
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/// Look up a record by pod name. Cloned so callers can drop the lock.
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pub async fn get(&self, pod_name: &str) -> Option<SpawnedPodRecord> {
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self.records
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.lock()
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.await
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.iter()
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.find(|r| r.pod_name == pod_name)
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.cloned()
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}
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pub async fn list(&self) -> Vec<SpawnedPodRecord> {
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self.records.lock().await.clone()
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}
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/// Remove the record for `pod_name`, persist, and clear its cursor.
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/// Returns the removed record (if any).
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pub async fn remove(&self, pod_name: &str) -> io::Result<Option<SpawnedPodRecord>> {
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let removed = {
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let mut records = self.records.lock().await;
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let idx = records.iter().position(|r| r.pod_name == pod_name);
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let removed = idx.map(|i| records.remove(i));
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self.runtime_dir
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.write_spawned_pods(records.as_slice())
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.await?;
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removed
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};
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self.cursors.lock().await.remove(pod_name);
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Ok(removed)
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}
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/// Read-only cursor lookup. Returns 0 when no cursor has been set.
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pub async fn cursor(&self, pod_name: &str) -> usize {
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self.cursors
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.lock()
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.await
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.get(pod_name)
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.copied()
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.unwrap_or(0)
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}
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pub async fn set_cursor(&self, pod_name: &str, cursor: usize) {
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self.cursors
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.lock()
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.await
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.insert(pod_name.to_string(), cursor);
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}
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}
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