Monorepo consolidation: workspace, shared types, transport plans, docker/swam assets

control/api/tests/placement_hot_reload.rs

@@ -0,0 +1,43 @@
+use std::{fs, path::PathBuf, thread, time::Duration};
+
+use api::PlacementStore;
+
+fn tmp_file(name: &str) -> PathBuf {
+    let mut p = std::env::temp_dir();
+    p.push(format!(
+        "cloudlysis-control-{name}-{}-{}.json",
+        std::process::id(),
+        std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)
+            .unwrap()
+            .as_nanos()
+    ));
+    p
+}
+
+#[test]
+fn placement_store_hot_reload_swaps_atomically() {
+    let path = tmp_file("placement");
+    fs::write(
+        &path,
+        r#"{"revision":"r1","aggregate_placement":{"placements":[]},"projection_placement":{"placements":[]},"runner_placement":{"placements":[]}}"#,
+    )
+    .unwrap();
+
+    let store = PlacementStore::new(path.clone());
+    let a1 = store.get_for_kind(api::ServiceKind::Aggregate);
+    assert_eq!(a1.revision, "r1");
+
+    thread::sleep(Duration::from_millis(5));
+
+    fs::write(
+        &path,
+        r#"{"revision":"r2","aggregate_placement":{"placements":[]},"projection_placement":{"placements":[]},"runner_placement":{"placements":[]}}"#,
+    )
+    .unwrap();
+
+    let a2 = store.get_for_kind(api::ServiceKind::Aggregate);
+    assert_eq!(a2.revision, "r2");
+
+    let _ = fs::remove_file(&path);
+}