Once you create the application configuration, you need to associate it with a composite application service unit endpoint. Then you can deploy the application and the new configuration is applied.
In NetBeans, open the Service Assembly file that contains the Data Mashup project to configure. If the Service Assembly file does not exist, do the following:
Create the composite application project.
Add the Data Mashup project to the composite application.
Build the composite application project.
Expand the composite application node, and then double-click on the Service Assembly node to open the CASA Editor.
On the CASA Editor, right-click the endpoint with which you want to associate the application configuration, and then click Properties.
In the Config Extension section of the Properties window, enter the name of the application configuration you created earlier.
Save the Service Assembly.
Deploy the project.
After you have deployed the project, your changes to the configuration are applied, providing you with a runtime switch of connections.