Using notification topics when migrating from Java APNS

[vlads63]

I am migrating to Pushy from Java APNS. In Java APNS to create a notification you only needed a token of the device and payload.

In Pushy you also need a topic. I cannot find any explanation on what this topic is and how to use it. If it was unnecessary in Java APNS why is it mandatory in Pushy? What should I specify as "topic" in my code?

[jchambers]

Please see Apple's documentation on "Sending Notification Requests to APNs". It says, in part:

In general, the topic is your app’s bundle ID/app ID. It can have a suffix based on the type of push notification… To learn more about app ID, see Register an App ID.

Java APNS didn't require a topic generally because it stopped being updated before Apple introduced APNs features that require a topic. In the modern APNs protocol, topics are required more often than not, and so Pushy always requires them to avoid confusing situations where things might just stop working if some seemingly-unrelated part of your setup changes and a topic hasn't been specified.

[vlads63]

Thank you for your reply. So App ID is the ID of the application that is sending push notifications, i.e. the application I am converting from Java APNS?

[jchambers]

I'm sorry this slipped through the cracks for so long.

i.e. the application I am converting from Java APNS?

No. It's the [usually] iOS application receiving the push notifications.