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 <[email protected]> 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}}{${web:servletContextName}}{%pid}
>
> I wonder if a simpler solution exists though.
>
> Thank you for your response.
>
> On Fri, Mar 26, 2021 at 5:27 AM Volkan Yazıcı <[email protected]>
> wrote:
>
>> Hello Clement,
>>
>> I am not an expert on *PatternLayout* and lookups, but I think I have a
>> hypothesis about what is going wrong and how you can fix it.
>>
>> *${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 <[email protected]>
>> 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
>>>
>>
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