Can you provide your lookup source?
On Oct 9, 2013, at 1:22 PM, Jonathan Willis <quicksilver...@gmail.com> wrote: > http://stackoverflow.com/questions/19277445/how-to-use-map-lookups-using-log4j2 > > > On Wed, Oct 9, 2013 at 2:18 PM, Ralph Goers <ralph.go...@dslextreme.com>wrote: > >> Please remember that mine is just one opinion, but I am fine with that. I >> guess if no default value is provided this way then it can still fall back >> to looking in the properties map. >> >> Ralph >> >> >> On Oct 9, 2013, at 12:53 PM, Woonsan Ko <woon_...@yahoo.com> wrote: >> >>> Hi Ralph, >>> >>> >>> I have something related to this improvement idea. >>> I have thought it might be a bit more useful and flexible to allow >> default value in the variable expression itself. >>> For example, ${var1:-defvalue1}, ${ctx:request_id:-defvalue2}, etc. >>> This generic feature has been included in StrSubstitutor of >> commons-lang3 with the following issue: >>> - https://issues.apache.org/jira/browse/LANG-893 >>> >>> I understand Oliver's patch should work more efficiently for map pattern >> converters, but the goodness of the feature with LANG-893 is we can use it >> more widely whenever used in look ups. >>> >>> I know StrSubstitutor in log4j2 added more operations to deal with >> LogEvent argument, so I can create a patch to include the feature of >> LANG-893 if it is useful for others. >>> Also, Oliver's patch won't conflict with this patch. >>> >>> What do you think? >>> >>> Kind regards, >>> >>> Woonsan >>> >>> >>>> On Tuesday, October 1, 2013 9:21 AM, Ralph Goers <rgo...@apache.org> >> wrote: >>>>> 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 >>>>>>>>> >>>>>>>>> >>>> --------------------------------------------------------------------- >>>>>>>>> To unsubscribe, e-mail: >>>> log4j-user-unsubscr...@logging.apache.org >>>>>>>>> For additional commands, e-mail: >>>> log4j-user-h...@logging.apache.org >>>>>>>> >>>>>>>> >>>> --------------------------------------------------------------------- >>>>>>>> To unsubscribe, e-mail: >>>> log4j-user-unsubscr...@logging.apache.org >>>>>>>> For additional commands, e-mail: >>>> log4j-user-h...@logging.apache.org >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> 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 >>>> >>>>>>> ____________________________________________________________ >>>>>>> >>>>>>> >>>> --------------------------------------------------------------------- >>>>>>> To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org >>>>>>> For additional commands, e-mail: log4j-user-h...@logging.apache.org >>>>>> >>>>>> --------------------------------------------------------------------- >>>>>> To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org >>>>>> For additional commands, e-mail: log4j-user-h...@logging.apache.org >>>>> >>>>> >>>>> -- >>>>> 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 >>>>> ____________________________________________________________ >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org >>>>> For additional commands, e-mail: log4j-user-h...@logging.apache.org >>>>> >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org >>>> For additional commands, e-mail: log4j-user-h...@logging.apache.org >>>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org >>> For additional commands, e-mail: log4j-user-h...@logging.apache.org >>> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org >> For additional commands, e-mail: log4j-user-h...@logging.apache.org >> >> > > > -- > Jonathan Willis --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
