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Connection Pooling Problem

Mike London
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Joined: Jul 12, 2002
Posts: 1066
Our application runs under WebLogic and Oracle.

The problem we ran into was creating "Manager" classes from a Struts action class (a Singleton). The actual problem was that our connection count kept increasing even though we closed the connections. We could see the connection
count climbing (in the Weblogic monitor) with each DAO access.

It seems that after the first action class did its thing with the database and then the next action class created some classes (DAOs), connections weren't being closed property. The code explicitly calls close on the connection, the result set and the statement.

Once we moved the instantiation of the manager classes to an EJB (and out of an action class), the problem went away. No more connection pooling issues.

Is an action class, therefore, a bad place to create objects which have connections the database via, say, connection pooling?

Thanks in advance for any comments.

Mike
Chris Boldon
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Joined: Aug 10, 2006
Posts: 190
Your view should never directly create or access a database connection.
Mike London
Ranch Hand

Joined: Jul 12, 2002
Posts: 1066
Hi Chris,

I guess my posting wasn't clear.

We're creating database connections in a J2EE application the correct way with DAO and related classes. We're also using connection pooling.

Thanks.
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Connection Pooling Problem