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Save ILoggingEvent.getArgumentArray() arguments from Logback to support structured logging #11861

@igor-suhorukov

Description

@igor-suhorukov

Is your feature request related to a problem? Please describe.

In legacy java application methods like log.info("Message {}, {} and {}, arg1,arg2,arg3) often happens in code.
It would be convenient to store such log arguments in telemetry for log search functionality without using full-text search.

Describe the solution you'd like

Save ILoggingEvent.getArgumentArray() into AttributesBuilder in the existing io.opentelemetry.instrumentation.logback.appender.v1_0.internal.LoggingEventMapper.mapLoggingEvent() and save log message pattern as attribute also.
Introduce capture-arguments boolean parameter to switch on/off this functionality as part of otel.instrumentation.logback-appender.experimental. and OpenTelemetryAppender

Screenshot from 2024-07-19 15-44-44

Describe alternatives you've considered

Use the structured log body for log arguments capture in OpenTelemetry for logback

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No response

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