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From Martin Gainty <>
Subject RE: Wish to use an independent class module in Tomcat
Date Tue, 26 Jun 2012 15:28:08 GMT


did you get a chance to look at implementing JDBCRealm

Place longwinded disclaimer here
 > Subject: Wish to use an independent class module in Tomcat
> Date: Tue, 26 Jun 2012 11:07:33 -0400
> From:
> To:
> My question may be covered by the Tomcat documentation and I am just
> confused by all the new terminology.  I have spent hours in reading and
> still I am looking to an answer. 
> We wish to have a class running on Tomcat that contains system wide info
> and multiple database connections into DB2 on the mainframe.   All other
> apps runing on Tomcat will open an instance of this class to access the
> static info and one of five open connections.  Opening and closing
> database connections is very slow and we wish to leave open the
> connections and just reuse them as needed. 
> We wrote the class and it runs ok.  Yet to get it to run with an app, we
> need to load the class jar file into the app and references in
> context.xml and web.xml as listed in the documentation. But that defeats
> the purpose of the global app because then there are multiple instances
> of the class.  
> We tried to insert a reference in <GlobalNamingResources> of server.xml.
> It doesn't seem to work for us.
> Or are we off base with this design?  Is app to app communication
> allowed?  Can I call a class from one app to another without first
> loading the called class into the calling class?
> I am using NetBeans IDE 7.1.1, Apache Tomcat 7.0.22 and Java 6.23
> (build 1.6.0_23-b05).  Java 7 is not an option in our shop yet because
> we are supporting a commercial package that breaks when run under Java
> 7.
> I would appreciate if the group could point me to the correct
> documentation to do what we are looking for, and perhaps a translation
> of the Tomcat specific terminology and jargon.
> Thanks
> Joe
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