Couldn't resist

I can't believe I've just wasted 2 DAYS of my vacation to properly configure logging in my project...

2 fucking days!!! For something as trivial (yet vital) as logging!!!

FUCK

To be a Java (or other business popular language) developer
* Java 6, 8 and features up to 14
* SQL + nosql
* Caching
* Logging eg log4j2,
* Searching eg elastic stack
* Reactive
* Framework (at least 1, but hey, knowing 1 is lame..)
* Networking or at least base http knowledge
* Tomcat, jboss or other shit
* Aws, heroku, GCE or other SAAS/paas
* Rest, RPC, soap
* Business Hello World example
* Hexagonal Architecture
* TDD
* Ddd
* Cqrs
* 12 app factor
* Solid
* Patterns
* docket
* Kubernetes
* Microservices
* Security, oauth2
* concurrency
* AMPQ
* Cloud
* Eureka or consul as service Discovery
* Config server
* Hazel cast
*
*
* Endless story ...

Then we can start hello word app

I'm trying to create log files with the PID or some JVM arg like app name but File appender doesn't parse ${myVar} in the config.

Issue is we have multiple instances of an app running but they can't be all writing to the same file.

I tried creating a custom Appender by pretty much copying the source code of FileAppender and then adding a function to add PID to the filename.

But when I use it, get some error saying "name, and fileName" are invalid parameters.

So wondering if anyone has experience building one that works out maybe there an existing code for such an appender?

Can't find official documentation or examples... Wtf...

In Log4j configs appender.filepattern, what are the % parameters that can be used. And is there one for UUID or process ID.

I have multiple instances of an app running with difference parameters, but they can't all write to the same file.