It would be trivial to create a lookup that returns the pid but I am not sure I would want to create a lookup for just that OS value. If we did create a lookup it might be something like:
${web:servletContextName:-${os:pid}} If you want that please create a Jira issue with perhaps suggestions as to what keys it should support. Ralph > On Mar 26, 2021, at 3:20 PM, Clément Guillaume <cguilla...@hotpads.com> wrote: > > Interesting, that didn't work (because it was printing the exact string > "{${web:servletContextName}" when the servlet name was missing) but using > your approach I got something that works: > > %equals{${web:servletContextName}}{${web:servletContextName}}{%pid} > > I wonder if a simpler solution exists though. > > Thank you for your response. > > On Fri, Mar 26, 2021 at 5:27 AM Volkan Yazıcı <volkan.yaz...@gmail.com> > wrote: > >> Hello Clement, >> >> I am not an expert on *PatternLayout* and lookups, but I think I have a >> hypothesis about what is going wrong and how you can fix it. >> >> *${web:servletContextName:-${sys:user.name <http://user.name>}}* lookup >> works, because the substitute is again a *lookup*. Though >> *${web:servletContextName:-%pid}* lookup doesn't work, because the >> substitute is a *pattern*. I think the following would do the trick: >> *%equals{${web:servletContextName}}{}{%pid}*. Would you mind checking, >> please? >> >> Kind regards. >> >> On Thu, Mar 25, 2021 at 2:32 AM Clément Guillaume <cguilla...@hotpads.com> >> wrote: >> >>> Hello, >>> >>> I'm trying to make a log pattern showing the servlet context name or, if >>> missing, showing the process id. >>> >>> ${web:servletContextName} %msg >>> works well for servlet context name alone. >>> >>> %pid %msg >>> works well for process id alone. >>> >>> ${web:servletContextName:-${sys:user.name}} %msg >>> works well for servlet context name with fallback to username system >>> property , >>> >>> ${web:servletContextName:-%pid} %msg >>> does work for servlet context name with fallback to process id. >>> >>> Am I missing something in my pattern? >>> >>> Thank you >>> >> --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org