[jira] [Commented] (CAMEL-11646) Upgrade brave to allow simple MDC logging

["Anton Koscejev (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAMEL-11646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16118490#comment-16118490 ] 

Anton Koscejev commented on CAMEL-11646:
----------------------------------------

According to the [OpenTracing API documentation|https://github.com/opentracing/opentracing-java] it seems that the spans should be activated and deactivated. 

E.g., a span can be created via {{Tracer.SpanBuilder.startActive()}} or it can be created via  {{Tracer.SpanBuilder.startManual()}}
(which is done right now, except using the deprecated {{start()}} method) and later activated via {{ActiveSpanSource.makeActive()}}. 
Consequently, an ActiveSpan should be deactivated via {{ActiveSpan.deactivate()}}.
The activation/deactivation is currently not done - this is probably a bug/oversight. This results in any CurrentTraceContext not working correctly, which is why MDCCurrentTraceContext cannot be applied.

A workaround that seems to work, but is probably not performing (de)activation at the correct time: 
{code}
@Bean
InterceptStrategy activateSpanInterceptStrategy(Tracer tracer) {
  // CAMEL-11646 spans are not activated currently
  return (context, definition, target, nextTarget) -> exchange -> {
    Optional<ActiveSpan> activeSpan = Optional.ofNullable(ActiveSpanManager.getSpan(exchange))
        .map(tracer::makeActive);
    try {
      target.process(exchange);
    } finally {
      activeSpan.ifPresent(ActiveSpan::deactivate);
    }
  };
}
{code}
Perhaps this logic can just be built into ActiveSpanManager, so it "holds" an ActiveSpan instance, not Span?

> Upgrade brave to allow simple MDC logging
> -----------------------------------------
>
>                 Key: CAMEL-11646
>                 URL: https://issues.apache.org/jira/browse/CAMEL-11646
>             Project: Camel
>          Issue Type: New Feature
>          Components: camel-opentracing
>    Affects Versions: 2.19.1
>            Reporter: Radek Mensik
>
> It would be nice if spans are logged as we know it from spring-sleuth. Simplest could be usage of brave-context-slf4j https://github.com/openzipkin/brave/tree/master/context/slf4j.
> Unfortunately this requires higher version of brave. I tried to make it work with 2.20.0-SNAPSHOT but no luck..



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