What happens when you create a database connection in ADF application?

When you create a database connection, JDeveloper generates a set of metadata XML files to keep the connection information. Let us take a quick look at these files.
                                                         

1. connections.xml:-

-This file contains the database connection detail that we create for development. If your application consumes web services or map viewer services, the corresponding connection uniform resource locator (URL) will also be present in this file.

2. jps-config.xml:-

-The jps-config.xml file is used to store the Oracle Platform Security configurations.
-The location of this file is configured in adf-config.xml.
-If your application is not configured to use ADF Security, this file, at a minimal level, acts as a pointer to cwallet.sso, which contains the password for the database connection details present in connections.xml.

3. cwallet.sso:-

-The cwallet.sso file follows the Oracle Platform Security Services (OPSS) specification and it is used as a credential provider in connecting to external systems, such as databases.
-This file is normally not edited directly.

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