Persist Database connection over user's session

On portal 3.0.9 with JPDK v1 I have a web provider that has a jsp portlet. The portlet has multiple pages which are navigated useing a parameter specified with the pageParameterName tag in the provider.xml. Each page needs to be able to access the database and to allow a rollback for all a users actions until a certain page is visited I need a way for all the access to be done through one database connection.
Putting the dbOpen tag in the event:session_OnStart tag of my globals.jsa file doesn't work (I'm not sure the event:session_OnStart is even executed) and trying to create the connection once with the scope="session" creates an error. Any help would be appreciated.

Generally speaking, persisting a connection over a users session is a BAD idea. If you really need to do it you simply be able to add the Connection object to the session. However, I would strongly recommend that you review your model because it will not scale.

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Look at the Http session class in the Servlet specification. It will maintain state for you across client requests.

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we are doing stress test on our new web site that uses vaadin framework and hibernate. Our application/web server is apache tomcat and maximum thread number is adjusted to 750.
we are using jmeter for stress test and when we send 500 user scenario (approximately 15 - 20 database connection per user) in 30 seconds
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Edited by: gokhangulgezen on May 31, 2011 6:38 AM

It's the DBMS. Oracle particularly can react this way when there are too many connection requests
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Persist Database connection over user's session

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