It's supposed to be called when the channel is disconnected (I know, right?).
Typically this will be the browser session ending (window close or navigate away), but also the client disconnecting using the js api. Disconnected and connected aren't actually called from the client, they're basically webhooks from the channel infrastructure, they seem pretty reliable. If disconnected gets called, I would take that as the channel token is no longer valid, so even if the client is still there it should create a new channel. Make sure you put an exponential backoff on that operation, a simple bug there can overwhelm your servers with even a small number of js clients. You probably know channels were recently deprecated, so if you're just starting now it might be better to turn to firebase or a saas alternative. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/ff54359a-e7da-496d-82e3-c9d3c8d8d0aa%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
