what is mvc architecture in web dynpro abap

So SAP has provided an option of assistance class where you can write all your business logic. But it is not a good practice to load all the business logic in the views or windows. We can write the business logic in the methods of the View, Window or even the Component controller. Uestion 16:What is an Assistance class in webdynpro ABAP? Where do you define an assistance class? How many assistance classes can a webdynpro component have?Īssistance class helps you achieve two things:ġ) Segregation of business specific logic (one of the purpose of MVC). In such a scenario, you can create one or more custom controllers and modularize or segregate the logic into separate parts using Custom Controller. When your Component Controller grows big in size ( say more than 10-15 views and corresponding context nodes, methods, events, event handlers etc), it might become tough to handle everything in the Component Controller. re-using views/methods/nodes of one WD component in another. Interface Controller would generally come into picture when you are doing component usage of some sort in web dynpro i.e.

Interface Controller is created by default when a webdynpro component is created. other webdynpro components), we make use of Interface controller. Whenever we want views, nodes or methods of a particular web dynpro component to be available to other the outside world ( i.e. Question 3: What is an Interface Controller? It controls the entire activity of your Web Dynpro Component. It is like a Global or Top Include for you program. It is the backbone of your Web Dypro Component. Question 2: What is Component Controller?Ĭomponent Controller is the King of all Controllers.

What is mvc architecture in web dynpro abap