[slf4j-user] logging common data simply

[Ceki Gülcü]

Regarding wrong line numbers shown with your log wrapper, with logback 
you can fix the issue by calling:

LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
lc.getFrameworkPackages().add("package of log wrapper");

Best regards,

--
Ceki

On 2/25/2017 21:15, Joachim Durchholz wrote:
> On 25.02.2017 20:34, Shanholtz, Jeff wrote:
>> I have a scenario where I have 1, 2, or 3 pieces of data (guids) which I
>> want to to log with all messages in order to track records as they
>> traverse their way through a series of microservices.
>
> That's a common scenario.
>
>> Currently I’ve written my own wrapper class with my own debug, info,
>> warn, error methods that take these 3 parameters, followed by the
>> message field, followed by the optional parameters.
>
> Any library function that you call will still use the original loggers
> so you won't know with which of the guids some log message from deep
> inside a call is associated.
> This is a real PITA if you have multiple requests executing in parallel.
>
>> There must be a better way, plus this has the disadvantage of rendering
>> the line number useless in log messages because the line numbers are the
>> line numbers from my log wrapper class, not the actual code doing the
>> logging.
>
> Elliot has the start of the trail right: Use an MDC.
> The other half of the trail is that formatters have an escape code for
> extracting data from the MDC (%m if I remember correctly).
>
> HTH
> Jo