Friday, September 12, 2008

How to handle post deployment modifications of J2EE applications in an OC4J?

The deployment, undeployment & redeployment of J2EE applications to OC4J can be easily done using Oracle Enterprise Manager 10g.

Impact of Undeploying/Redeploying an Application

During a redeployment, OC4J removes the existing application before redeploying the new EAR/WAR.

1. The application is removed from the OC4J runtime and is no longer accessible to clients
2. All application files are removed from applications/ & application-deployments/ directory
3. In an Oracle AS environment, Oracle HTTP server will be restarted to remove the mount point defined for the application. This will result in the loss of existing HTTP Sessions.

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