Subscription Cleanup

Automatic Cleanup

The following subscriptions are cleaned up automatically by the EdgeInteract packages:

React Cleanup via useEffect

When using the React bindings, cleanup is handled automatically via React's useEffect cleanup function. The InteractionProvider ensures all subscriptions are cleaned up on unmount:

// Inside InteractionProvider (simplified)
useEffect(() => {
  const subscriber = new InteractionSubscriber();
  subscriber.start(currentUser.id, interactionQueue);

  return () => {
    // Cleanup runs on unmount or when currentUser.id changes
    subscriber.stop();
  };
}, [currentUser.id]);

Manual Cleanup for Custom Subscriptions

If you create your own EdgeStream subscriptions for interaction topics (not recommended — use the provided hooks), you must clean them up manually:

// Manual subscription cleanup — only if bypassing the built-in provider
const sub = await edgeStreamClient.subscribe('interactions.custom.topic', handler);

// In cleanup / useEffect return:
return () => {
  sub.unsubscribe();
};

Verifying No Subscription Leaks

The EdgeInteract observability package exposes an active subscription count. Use the InteractionMonitor component to verify:

• Active callback subscriptions should equal the number of in-flight interactions
• A growing count of active callback subscriptions (over time) indicates a leak
• The subscription count should drop to 0 when all interactions are resolved and the user logs out