Get instance handle from Sample Info (CON-346)

[jcass8695]

Hello, I am X-posting this issue from the Go Connector repo for better visibility, I will paste the details from that issue here.

Proposal:

Hello 👋🏻 I would like to be able to get the instance_handle field from the Sample Info structure (called Infos in this library). I have tried forking the library and adding a simple method that replicates what already exists, you can view it here: rticommunity/rticonnextdds-connector-go#59

Current behavior:

Unfortunately calling this method results in the following error in our Go code:

err = m.reader.Take()
if err != nil && !errors.Is(err, rti.ErrNoData) {
	return fmt.Errorf("taking samples from input: %w", err)
}

l, err := m.reader.Samples.GetLength()
if err != nil {
	return fmt.Errorf("taking samples from input: %w", err)
}

for i := range l {
        instanceHandle, err := m.reader.Infos.GetInstanceHandle(i)
        if err != nil {
	        return fmt.Errorf("getting instance handle from sample: %w", err)
        }
        ...
}

getting instance handle from sample: DDS Exception: 
 RTILuaSampleInfo_get:Unknown SampleInfo field: instance_handle
  RTILuaMetamethodImpl_InDataDereference:!RTILuaSampleInfo_get failed with retcode  1
   RTILuaMetamethodImpl_InData:!dereference operation failed with retcode  1
    RTI_Connector_get_json_from_infos:!get stack values

Desired behavior:

The instance handle is returned.

Use case:

[alejnp]

Hello @jcass8695. This will be a possibility in the next Connector (Native) release. This is tracked internally as CON-346.

All bindings would need to be updated to use the latest Connector release, although there are no required API changes.
The returned format would be a JSON array of 16 elements, all of them integers in the range 0-255.

[jcass8695]

Awesome @alxe, thanks for the update. Is CON-346 public? Can I track it?

[alejnp]

Awesome @Alxe, thanks for the update. Is CON-346 public? Can I track it?

The identifier is public, but the information is not. I've updated the Github issue to track the internal issue.