Allow configuration of `CassandraObservationConvention`

[divyagangigunta123]

Hi Team,

I have integrated my spring boot application with cassandra observability. Have configured it and able to push low cardinality metrices to prometheus. But unable to push high cardinality keys to prometheus with the existing code base.

What all changes need to be done to push high cardinality keys as well ? or Can I convert high cardinality key to low cardinality key and push metrices to prometheus ?

Can you please allow wiring to CassandraObservationConvention interface ?

Regards,
Divya.G

[mp911de]

CassandraObservationConvention is deeply buried in CqlSessionObservationInterceptor and ObservableReactiveSession. Currently, there's no external access available to configure the convention.

We would need a configuration mechanism instead of passing on all the individual parts as method or constructor arguments.

[divyagangigunta123]

Can you please let me know how we can add configuration mechanism for assandraObservationConvention ?

[mp911de]

Since all classes are package-private, there's nothing you could do except for duplicating our code into your codebase and applying the desired changes there.

[divyagangigunta123]

Can you please let me know in which class only low cardinality keys are getting picked ? So, that will duplicate that codebase and modify accordingly for db.statement to be picked under low cardinality keys.

[divyagangigunta123]

Can you please let me know which class need to be overridden and how to allow db.statement into low cardinality ? This will be helpful if you can please suggest on this