This is a Sample of MDC - SLF4/LOG4J

• The goal is add PID "Process Id" (dummy) to MDC logger (Mapped Diagnostic Context).
• This is very useful when you want to attach some additional metadata to every line written-out to the logs.
• The same logic you can use to log for example the user session Id.

You can test it from the CONSOLE, WEB or THREADS:

• CONSOLE: print log on command line, run HomeConsole.java.
• WEB: print log on command line, run mvn jetty:run and go to http://localhost:8080/sample-logback.
• THREADS: print log on command line, run HomeThread.java.