[leshan-dev] objectID is always 0 in Observe.onResponse

[Cobalt F <toutcobalt@xxxxxxxxx>]

Hi,

I'm trying to set up a custom server based on Leshan-server code.

I want to store some data received from devices into a database. 

Currently I'm using the provided leshan-client-demo as the only client, for testing purpose.

My plan is to listen to observation responses, with an ObservationListener.onResponse handler.

For each of these events, I also need to retrieve the name of each resource to write them accordingly into my database.

For that, I use server.getModelProvider related methods.

Here is a code snippet of my handler:

        private LeshanServer server;

private ObservationListener obsListener = new ObservationListener() {

public void onResponse(Observation obs, Registration reg, ObserveResponse res) {

LwM2mObjectInstance content = (LwM2mObjectInstance) res.getContent();

int objectId = content.getId(); // Here I retrieve the object ID, but it's always 0

LwM2mModel objectModel = server.getModelProvider().getObjectModel(reg);

for (Map.Entry<Integer, LwM2mResource> r : content.getResources().entrySet()) {

int resId = r.getValue().getId(); // This one is okay

ResourceModel model = objectModel.getResourceModel(objectId, resId); // and here I'm trying to use it

if (model != null) {

System.out.println(model.name);

}

}

}

                // Other handlers next...

        }

The issue is to retrieve correctly the object id.

Here my objectId is always 0. So except for the first object, the resource model is null (as I suppose it doesen't match anything).

I don't see any other data in the ObserveResponse.

When I manually set objectId to other values (1, 2, 3, ...8), it works like a charm for the corresponding object.

I think it's not normal. What could be the origin of this bug?

Thanks.

Sincerely,