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The io.smallrye.config.LoggingConfigSourceInterceptor logs lookups of configuration names in the provided logging platform. The log information includes config name and value, the config source origin and location if it exists.

The log is done as debug, so the debug threshold must be set to debug for the io.smallrye.config appender to display the logs.

This requires registration via the ServiceLoader mechanism in the META-INF/services/io.smallrye.config.ConfigSourceInterceptorFactory file of the io.smallrye.config.LoggingConfigSourceInterceptor interceptor.