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Re: Is there a way to develop my own resolver for JSON template layout?
I see, it is indeed implemented as a `PatternConverter`. Yet they can still
implement that as a `StrLookup` and use it via "${traceId}" in the JSON
template – both PatternLayout and JsonTemplateLayout can resolve it
accordingly.
On Sun, Sep 19, 2021 at 11:48 PM Ralph Goers
wrote:
> Volkan,
>
> The syntax is wrong for it to be a lookup. With that syntax it must be a
> PatternConverter.
> You can find the source for it at
> https://github.com/apache/skywalking-java/blob/main/apm-application-toolkit/apm-toolkit-log4j-2.x/src/main/java/org/apache/skywalking/apm/toolkit/log/log4j/v2/x/TraceIdConverter.java,
>
> not that looking at will help you figure out what it actually does.
>
> His request makes sense though. He wants the traceId to show up as an
> individual
> field in the JSON. It would have been better though if SkyWalking had
> provided a
> simple way to inject it into the ThreadContextMap. Then nothing special
> would be needed.
>
> Ralph
>
> > On Sep 19, 2021, at 12:24 PM, Volkan Yazıcı
> wrote:
> >
> > This is the first time I have ever heard about SkyWalking, hence
> apologies
> > in advance if I am about to say something nonsense. In the link you have
> > shared, I see that you use the `%traceId` directive in your PatternLayout
> > configuration. Is that a simple Lookup implementation, e.g., extending
> from
> > StrLookup? If so, why not simply use that Lookup in JsonTemplateLayout
> > <
> https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#faq-lookups
> >
> > too?
> >
> > On Sat, Sep 18, 2021 at 10:26 AM jingguo yao
> wrote:
> >
> >> Volkan, I am thinking of the integration of Log4j2 JSON template layout
> >> with SkyWalking. SkyWalking has done the integration with Log4j2 for the
> >> pattern layout:
> >>
> >>
> https://github.com/apache/skywalking-java/blob/main/docs/en/setup/service-agent/java-agent/Application-toolkit-log4j-2.x.md
> >> .
> >> With the resolver extending supported, it can be easily done.
> >>
> >>
> >>
> >> On Fri, Sep 17, 2021 at 3:26 PM Volkan Yazıcı
> >> wrote:
> >>
> >>> Jingguo, I am curious, what kind of a new resolver do you want to
> >> develop?
> >>> If that is something useful for other users, it is good to ship that in
> >>> Log4j by default.
> >>>
> >>> On Mon, Sep 6, 2021 at 8:03 AM jingguo yao
> wrote:
> >>>
>
>
> >>>
> >>
> https://logging.apache.org/log4j/2.x/manual/json-template-layout.html#map-resolver-template
> lists all the supported resolvers. I want to develop a new resolver.
> Is
> there a way to do this?
>
> --
> Jingguo
>
> >>>
> >>
> >>
> >> --
> >> Jingguo
> >>
>
>
>
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