Injecting Span Info Into Logging MDC

[mrathbun1]

I see that the auto-instrumentation supports injecting info on the current span into the logging implementation's MDC: https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/docs/logger-mdc-instrumentation.md. I am wondering if it is possible to accomplish something similar when using the API directly in our code. Ideally when a span is made current we would inject this same info into the MDC, and clear the MDC when it is no longer relevant. Is there some sort of hook we could use to do this?

[trask]

hi @mrathbun1! I think these may be what you're looking for:

https://github.com/open-telemetry/opentelemetry-java-instrumentation/tree/main/instrumentation/logback/logback-1.0/library
https://github.com/open-telemetry/opentelemetry-java-instrumentation/tree/main/instrumentation/log4j/log4j-2.13.2/library

[mrathbun1]

Thank you!