Tuesday, June 11, 2013  SOA Black Belt Workshop, Day 1:
Infrastructure Essentials  Today was the first day of the SOA
Black Belt Workshop that is organized by Jürgen Kress and is
delivered by people from Product Management: Flavius Sana,
Simone Geib and Rajesh Raheja.  The theme of the day was
infrastructure essentials. There were four topics. I took away
the following points:  WebLogic Server essentials for SOA: CAT,
Errors and Exceptions  Flavius explained how class loading works
in WebLogic. As a JEE developer, this was pretty straight
forward. However, I still learned two new things:   • Using CAT,
WebLogic Server class loader analysis tool to analyze class
loading on WebLogic (http://localhost:7001/wls-cat/ )   • The
difference between a ClassDefNotFoundError and a
ClassNotFoundException. Knowing the difference helps in trying
to solve class loading problems. The ClassNotFoundException is
an exception from a class loader that tries to load a class that
is not available to that specific class loader. The