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opentelemetry_logger_metadata

0.2.0
0.2.0 0.1.0 0.1.0-rc.3 0.1.0-rc.2 0.1.0-rc

Adds OpenTelemetry trace identifiers to logs

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opentelemetry_logger_metadata src opentelemetry_logger_metadata.erl
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src/opentelemetry_logger_metadata.erl 

-module(opentelemetry_logger_metadata).



-export([setup/0,

         filter/2]).



-include_lib("opentelemetry_api/include/opentelemetry.hrl").



-spec setup() -> ok.

setup() ->

    logger:add_primary_filter(opentelemetry_logger_metadata, {fun filter/2, []}),

    ok.



filter(LogEvent, _Config) ->

    case otel_tracer:current_span_ctx() of

        undefined ->

            ignore;

        SpanCtx ->

            HexTraceId = otel_span:hex_trace_id(SpanCtx),

            HexSpanId = otel_span:hex_span_id(SpanCtx),



            #{meta := Meta} = LogEvent,

            MetaWithTraceInformation = Meta#{trace_id => HexTraceId, span_id => HexSpanId},

            LogEvent#{meta => MetaWithTraceInformation}

    end.