Before I start I would like to note that I checked theserverside.com,
java.com but  didn't find the answer.  I read the Sun's j2ee tutorial
many times.  Develop webservice myself.

Ok, here's the simple question:

I need to have a big data structure on the server.  It's thread safe.
Then a stateless session allowing client connecting to it.  The
stateless session is easy part.  My question is where on the J2EE
server that I can put my big data structure that needs initialized
before the server starts, and stay there.  It's big and complex that a
simple relational database mapping won't work.  I don't want it to be
a record in an entity bean either because it's not that simple.  Right
now, I have a corba server running fine with this without any problem.
But I want to migrate to J2EE.  I know that I could have this as a
servlet/jsp solution too.  My question is with regard to the
enterprise java bean pattern for this.  It's just a simple thing on
Corba, and J2EE is natural evolution of the Corba, and I just don't
know what the solution is.

Thank you very much for your time,

Vd.