Creating an Application Service
Use
Application services contain the business logic of your application. You can also use application services to present data to the user interface.
Prerequisites
· You should have installed the following software:
¡ SAP Web Application Server Java
¡ SAP NetWeaver Developer Studio
· You should have completed the tutorial Developing Your First Business Object.
·
You have opened
the Composite Application perspective
in SAP
NetWeaver Developer Studio.
Procedure
...
1. Open the carpool application in the SAP NetWeaver Developer Studio.
2. In the Composite Application Explorer view, click modeled package with the secondary mouse button and choose New Application Service.
3. In the Application Service Name field, enter TravelLocationApp and choose Finish.
4. In the Composite Application Explorer view, double-click the TravelLocationApp service and open the Dependency tab page.
5.
From the Existing Objects tree select the business object TravelLocation and choose 
with the quick info text Add Dependency.
The new object appears under the Dependent Objects list.
Result
You have created your first application service and it appears in the Composite Application Explorer view.
Step 2: