139693178 Enhancement Framework

Enhancement Framework

Enhancement Framework.ppt

Agenda

IntroductionComponentsEnhancement OptionsExplicit Enhancement OptionImplicit Enhancement OptionEnhancement SpotsEnhancement Implementations

- * -Enhancement Framework.ppt

Introduction to Enhancement Framework


Current options available for EnhancementsUser-Exits: The very first mechanisms provided by SAP to execute custom code in between the standard SAP control flow. This is implemented as subroutine call (PERFORM xxx). A classical example for User-Exit is MV45AFZZ include in order processing module of SAP R/3. Customer Exits: It is implemented using Function Modules and so has a well defined parameter interface. Also since the custom coding done as part of these customer-exits is located away from the original SAP code, the maintenance is easier than user-exits. (Before 4.6, only through customer-exits)BADIs: It exist in pre NW04s releases are now called old classic-BADIs. This was the first object-oriented way to enhance the ABAP system. This, to a certain extent, allows multiple implementations with limited filter support. The classic-BADIs are implemented using ABAP Objects.


Evolutions of SAP Enhancement Technology


Drawbacks of previous Enhancement TechniquesNo support for multiple users or projectsNo support for parallel developmentsWill appear much more often in adjustment toolsHigher adjustment effort (during upgrade & SP import)


What is Enhancement FrameworkNew enhancement concept in SAP. Released from SAP NetWeaver 7.0Replace or incorporate the existing enhancement and modification concepts (solve the issues with the previous concepts).Enables the integration of different concepts for modifying and enhancing development objects. The enhancements of the enhancement concept can be switched on/off using the Switch Framework.


Different components of the Enhancement FrameworkThe enhancement framework consists of three higher level components :Enhancement Option - Are positions in Repository objects where enhancements can be made. These options are either explicitly defined (by the developer) or exist implicitly.

Enhancement Spots - The enhancement spots are used to manage explicit enhancement options. Enhancement spots carry information about the positions at which enhancement options were created.

Enhancement Implementation - The enhancement implementations manage the enhancements of the enhancement options, both explicitly and implicitly.


Enhancement Options


Types of Enhancement OptionsEnhancement options can be classified into two categories :Explicit Enhancement OptionImplicit Enhancement OptionAre defined explicitly by the developer.Managed using enhancement spotsEnhanced using enhancement implementationsAre of two types :Source code plug-inKernel BADI (or new BADI)Always exist and do not have to specified by developerNo enhancement spots are neededEnhanced using Enhancement ImplementationsAre of three types :Specific options in programsParameter interfaces of function modulesMethods of classes


Enhancement Spots


What are Enhancement SpotsEnhancement spots are created to manage explicit enhancement optionsAn explicit enhancement option is always referenced using spot name and option nameAn enhancement spot can contain multiple enhancement optionsAn enhancement option can be assigned to multiple enhancement spots.A composite enhancement spot can hold multiple simple enhancement spots.Spots are always provided by the application developerNo spots are required for implicit enhancement options


Enhancement Implementation


What is an Enhancement ImplementationUsed to manage enhancementsEnhancement Implementations are created by the customerAn enhancement can/must be a part of only one enhancement implementationAn enhancement implementation can contain multiple enhancementsAn individual enhancement inside an implementation is known as an enhancement implementation element.An enhancement implementation element for a explicit enhancement option must be associated with an enhancement spot.A composite enhancement option can contain multiple simple enhancement options.


Representation of Spot and Implementation


Explicit Options


Source Code Plug-inThe following enhancement options are available in the source code:Enhancement - Point Can be static (data declaration) or dynamic (coding).Used as a place holder to place additional coding.Can belong to multiple enhancement spotsMultiple active implementations possible and will be executed with no guarantee in the order of execution.

Enhancement SectionCan be static or dynamicUsed to modify / replace a certain section of code. Only one is active at a time.Can belong to multiple enhancement spots.Implementation gets executed and the original code does not gets executed.


Source Code Plug - in Editor ModesCreating enhancement options Use the Change mode for creating enhancement points or sectionsUse the button to switch between change display modes

Implementing enhancement options Use the Enhancement mode to create implementationsUse the button to get into the enhancement mode.

Use the button to leave the enhancement mode.


Demos for Explicit Enhancement Options

Demo for Enhancement Point

Demo for Enhancement Section:

Before Implementation

After Implementation


BADI Enhancement OptionWhat are BADIs ?Business Add InsIs an anticipated point of exception these points act like sockets and exist in the original codinghas well defined interface in contrast to source code plug-ins and is more stable to changes in the original code

Kernel BADIs New FeaturesCan be switched by switch frameworkIntegrated directly in the ABAP language runtimeImproved filter support (non-character filter types) Enable Reusable Implementations Stateful BADIControl lifetime of Implementations BADI-Context


BADI Enhancement Option - ComparisonThe new BADI has several advantages over the classic BADIsClassic BADINew BADI


Demo for Kernel BADI

Creation of Enhancement Spot fro BADI

Creation of Enhancement Implementation for BADI

Call of the BADI from the program


Implicit Options


Source code (Specified points) options :These are enhancement options at predefined points in a program :At the end of an IncludeAt the end of a private, public or a static section of a classAt the end of an implementation for a classAt the end of an interface definitionAt the end of structure definitionsAt the start of a procedure (Subroutine, Method, Function)At the end of a procedureAt the end of parameter set of a method (Changing, Importing, Exporting)Demo for Implicit Enhancement of Subroutine

Implicit enhancement options always exist and no enhancement spot is assigned to them.


Parameter Enhancement OptionThe parameter enhancement option provides an option to add new parameters to a function module interfaceThe parameters are always optional.The added parameters can be utilized by making other enhancement implementations in the source code.Demo for Parameter enhancement option for Function Module


Class Enhancement OptionUsing the class enhancement options you can :Add new methods to a class / interfaceAdd new attributes (Public / Private / Protected)Add pre or post methods to an existing methodDemo for Class Enhancement Option


Copyright 2008 Deloitte Development LLC. All rights reserved.

*Classic BADIs :selecting implementations and issuing calls ismixed upcalls cause DB accesscalls are redirected over a proxy class

Kernel BADIs:selection occurs when the handle is requestedno DB access during runtimeImplementations are called directly (without a proxy)Active implementations are evaluated at compile timeand included in the load of the BAdI-handle.

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139693178 Enhancement Framework