Wrapping Services in Controllers

Prerequisites

  • You have created a Web Dynpro DC and a WD component.

  • You have also defined a WD model for the model binding and declared it to the component.

Context

The Data Modeler provides graphical support when implementing controllers; this integrated function is known as the Service Controller. The wizard, which is started in the Data Modeler or the Web Dynpro Explorer, creates a controller that wraps a service. This service can either be a Remote Function Call or a Web service. You start the wizard for an existing controller or generically in the Custom Controller area of the Data Modeler . The wizard then creates the required contexts and an optional method for triggering the call.

The Service Controller enables the following:

  • Creation of a context node structure with model binding for the chosen controller

  • Proper code generation for the instance creation in wdDoInit method (based on the chosen nested structure and cardinality).

  • Proper code generation for the model class execution in a newly created execute method (specified in the wizard).

Procedure


  1. In the work area of the Data Modeler, place the cursor on an existing custom controller, or in the Custom Controller area and choose Apply Template from the context menu.

  2. Carry out the model binding as well as the attribute binding by selecting the relevant context elements.

  3. Choose Next if you want to create a method. Otherwise, you can choose Finish to exit the wizard at this point and save your changes.

  4. Enter a method name and exit the wizard.