Connecting the J2EE Engine to DBs 

Purpose

As a middle-tier software, the J2EE Engine uses an external relational database to store its persistent information. The database stores the source code and the configuration data for the J2EE Engine services and managers, and for the applications deployed on the server. This model provides security and integrity of the data in cases of system upgrade or server failure.

Features

The J2EE Engine provides the Configuration Manager that enables connectivity to the database and manages persistent data storage. You can edit offline the parameters defining the database to which the application server connects and the properties of this connection.

Data is stored in the database in configuration objects. You can modify them indirectly – for example, by changing the properties of a module. The Configuration Adapter Service also enables you to edit the configurations directly in the database. This service also provides monitoring functions.

The database is initialized and the connection to it is configured for the first time at installation. The installation procedure creates the tables in the database, copies all the necessary data to it, and sets the proper parameters for establishing a connection. You can configure a database connection manually. If you want to switch to another database, you must make sure that the database has been properly initialized and that all the data necessary to run the J2EE Engine is in the database.

It is strongly recommended that you use the automatic configuration.