Not possible to update a subscription

[MichelSc]

I use version 2.16 of the iotagent-node-lib libary.

There are methods to adding a subscription (function subscribe(device, triggers, content, callback)) and for removing a subscription function unsubscribe(device, id, callback). These methods are OK.

But I need a method to update a subscription, implementing the http method PATCH /v2/subscriptions.

Workaround of doing first a subscribe and then an unsubscribe is not sufficient

• registration id will change, so I will need to write more code (without much value)
• notifications could be lost between the subscribe and the unsubscribe

[fgalan]

This issue about unsubscribe logic may be related: https://github.com/telefonicaid/iotagent-node-lib/issues/576

[fgalan]

To understand this better, from which point the new method would be called? In which use case it would be used?

[fgalan]

registration id will change

Do you mean subscription id?

[MichelSc]

This is issue is not related to issue #576 (which is about the unsubscribe).

This issue requires to be able to update an existing subscription.

There is a typo in my issue description: I meant subscription id and not registration id, the id will change if we do a subscribe/unsubscribe.

This issue is related to issue #1086:

• In my use case, I need different subscriptions for a same device
• These subscriptions must be added and removed independently of each other.
• If I could recognize the subscription in the notification handler, no problem, I would make different subscriptions for the same device
• but I cannot, issue #1086!
• so I merge the different subscriptions for the same device into 1 subscription
• and then I need to update the 1 subscription for the device (this issue)

In my eyes, issue #1086 is more blocking than this issue.