[How-to] Object versioning at server side

Hello guys, Do you have any advices on how to best implement object versioning on the server side. The idea is that we will have different devices connecting to our server. Each one with different object versions of course. However, on each connection we need to do a number of actions on the device (read battery levels, location, etc…). So I need to support multiple object versions at the same time. I am not sure how to do it on the code side. Do you have any advice you could give?

Thanks PS: I am using the VersionedModelProvider

[sbernard31]

So let’s say you have :

• 26243 in version 1.0 (with latitude/longitude)
• 26243 in version 2.0 (without latitude/longitude)
• 26244 in version 1.0 (with latitude/longitude)

So device A will register itself with ...</3/0>,</26243/0> ... And device B with ...</3/0>,</26243>;ver=2.0</26243/0>, </26244/0>... (v1.0 is not visible because this is the default value)

With this information Leshan will be able to automatically decode or encode value correctly. But it can not decide at your place that you should read 26244/0/1 instead of 26243/0/1 … (or read on 26244/0 instead of 26243/0) So it’s up to you to send the right request. To know which request you need to send you can use Registration.getSupportedVersion(26243) == "1.0" or Registration.getSupportedVersion(26244) != null

[oz117]

Thanks for the help closing this 😄