Patches are always welcome!
Ralph
On Oct 1, 2013, at 1:13 AM, Oliver Flege <ofl...@vwd.com> wrote:
>> $${mdc:request_id} in a pattern should cause the request_id to be evaluated
>> on every event.
>
> thanks a lot, $${ctx:request_id} seems to do the trick
>
> however, the computation of the default value is quite complex as it always
> involves
> a variable substitution, and I cannot use conversion specifiers with $$ as I
> can with %X
>
> Would you consider accepting a patch that adds support for slf4j-like default
> values
> in %X{key} and %K{key}, s.th. like %X{key:-defaultValue} ?
>
> Regards,
> Oliver
>
>
>
>>
>>> On Sep 30, 2013, at 8:04 AM, Oliver Flege <ofl...@vwd.com> wrote:
>>>
>>> ok, this works for ${...} expressions in the configuration, but I don't see
>>> how it would
>>> apply to pattern evaluation. To simplify and rephrase my original question:
>>>
>>> Given a pattern layout with a pattern like: %X{REQUEST_ID}
>>>
>>> is it possible to define a default value that will be printed
>>> if the thread never executed ThreadContext.put("REQUEST_ID", "XYZ")?
>>>
>>> I tried ${mdc:REQUEST_ID} + a Property REQUEST_ID, but that
>>> will only be evaluated when the configuration is parsed.
>>>
>>> Oliver
>>>
>>>> Yes, it supports default values. Specify them as properties at the
>>>> beginning of your configuration. Then when you specify something like
>>>> ${sys:foo} if foo is not defined as a system property the default value
>>>> will be used,
>>>>
>>>> Ralph
>>>>
>>>>> On Sep 30, 2013, at 3:30 AM, Oliver Flege <ofl...@vwd.com> wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I am considering to switch from slf4j/logback to log4j2;
>>>>>
>>>>> in slf4j/logback, I can specify a default value for a missing mdc entry
>>>>> like this:
>>>>>
>>>>> <pattern>%d{HH:mm:ss} %X{FOO:--} %c{0} - %m%n</pattern>
>>>>>
>>>>> which would print "-" if mdc.get("FOO") is null (the ":-" separates
>>>>> the key and the default value).
>>>>>
>>>>> Having a defined number of tokens/fields at the beginning of the log
>>>>> message
>>>>> makes it easier to process it with awk/cut etc.
>>>>>
>>>>>
>>>>> Does log4j support default values? - I could not find any hint in the
>>>>> documentation
>>>>>
>>>>>
>>>>>
>>>>> Regards,
>>>>> Oliver
>>>>>
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>>>
>>>
>>> --
>>> Oliver Flege
>>> Senior Software Engineer | vwd group
>>>
>>> vwd Vereinigte Wirtschaftsdienste AG
>>> Stiftsplatz 6/7 | 67655 Kaiserslautern
>>> Telefon: +49 631 3649-0 | Telefax: +49 631 3649-109
>>> ofl...@vwd.com | www.vwd.com
>>> ______________________________________________________________
>>>
>>> vwd Vereinigte Wirtschaftsdienste AG
>>> Sitz der Gesellschaft: Tilsiter Straße 1 | 60487 Frankfurt am Main
>>> Handelsregister: AG Frankfurt am Main HRB 81011
>>> Vorstand: Dr. Ralf Kauther
>>> Vorsitzender des Aufsichtsrates: Dr. Thorsten Dippel
>>> ____________________________________________________________
>>>
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>>
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>
>
> --
> Oliver Flege
> Senior Software Engineer | vwd group
>
> vwd Vereinigte Wirtschaftsdienste AG
> Stiftsplatz 6/7 | 67655 Kaiserslautern
> Telefon: +49 631 3649-0 | Telefax: +49 631 3649-109
> ofl...@vwd.com | www.vwd.com
> ______________________________________________________________
>
> vwd Vereinigte Wirtschaftsdienste AG
> Sitz der Gesellschaft: Tilsiter Straße 1 | 60487 Frankfurt am Main
> Handelsregister: AG Frankfurt am Main HRB 81011
> Vorstand: Dr. Ralf Kauther
> Vorsitzender des Aufsichtsrates: Dr. Thorsten Dippel
> ____________________________________________________________
>
> ---------------------------------------------------------------------
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>
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