3 ms·

> the stock manager could offer a feed How does it differ from polling?

• icebraining 11y ago
  It doesn't, it differs from polling each product, since it provides a single resource for all of them. An alternative would be for the Inventory system to allow the Email system to register a callback URL (aka Webhook) with it that gets called when the stock updates - allowing for push events while maintaining a decoupled architecture -, but that is only useful if the stock only gets updated sporadically, as you should still have a resource that can be polled, in case the Email system dies and then needs to check what happened when it was offline.