v1.0.19

src/lib/server/event-collector.ts

@@ -2,17 +2,25 @@
  * Container Event Emitter
  *
  * Shared EventEmitter for broadcasting container events to SSE clients.
- * Events are emitted by the subprocess-manager when it receives them from the event-subprocess.
+ * Events are emitted by the collection worker when processing Docker events.
+ *
+ * IMPORTANT: Uses globalThis to ensure a single instance across all module imports.
+ * In Vite dev mode and SvelteKit production builds, server modules can be loaded
+ * multiple times (HMR, chunking), creating separate EventEmitter instances.
+ * Using globalThis guarantees emitters and listeners share the same object.
  */
 
 import { EventEmitter } from 'node:events';
 
-// Event emitter for broadcasting new events to SSE clients
-// Used by:
-// - subprocess-manager.ts: emits events received from event-subprocess via IPC
-// - api/activity/events/+server.ts: listens for events to broadcast via SSE
-export const containerEventEmitter = new EventEmitter();
+const GLOBAL_KEY = '__dockhand_container_event_emitter__';
 
-// Allow up to 100 concurrent SSE listeners (default is 10)
-// This prevents MaxListenersExceededWarning with many dashboard clients
-containerEventEmitter.setMaxListeners(100);
+// Ensure single instance via globalThis
+if (!(globalThis as any)[GLOBAL_KEY]) {
+	const emitter = new EventEmitter();
+	// Allow up to 100 concurrent SSE listeners (default is 10)
+	// This prevents MaxListenersExceededWarning with many dashboard clients
+	emitter.setMaxListeners(100);
+	(globalThis as any)[GLOBAL_KEY] = emitter;
+}
+
+export const containerEventEmitter: EventEmitter = (globalThis as any)[GLOBAL_KEY];