Enhancement Framework

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Agenda

Introduction

Components

Enhancement Options•Explicit Enhancement Option•Implicit Enhancement Option

Enhancement Spots

Enhancement Implementations

Introduction to Enhancement Framework

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Current options available for Enhancements

User-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)

BADI’s: It exist in pre NW04s releases are now called old classic-BADI’s. 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-BADI’s are implemented using ABAP Objects.

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Evolutions of SAP Enhancement Technology

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Drawbacks of previous Enhancement Techniques

No support for multiple users or projects

No support for parallel developments

Will appear much more often in adjustment tools

Higher adjustment effort (during upgrade & SP import)

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What is Enhancement Framework

New enhancement concept in SAP. Released from SAP NetWeaver 7.0

Replace 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.

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Different components of the Enhancement Framework

The 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.

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Enhancement Options

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Types of Enhancement Options

Enhancement options can be classified into two categories :

Explicit Enhancement Option Implicit Enhancement Option

Are defined explicitly by the developer.

Managed using enhancement spots

Enhanced using enhancement implementations

Are of two types :– Source code plug-in

– Kernel BADI (or new BADI)

Always exist and do not have to specified by developer

No enhancement spots are needed

Enhanced using Enhancement Implementations

Are of three types :– Specific options in programs

– Parameter interfaces of function modules

– Methods of classes

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Enhancement Spots

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What are Enhancement Spots

Enhancement spots are created to manage explicit enhancement options

An explicit enhancement option is always referenced using spot name and option name

An enhancement spot can contain multiple enhancement options

An 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 developer

No spots are required for implicit enhancement options

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Enhancement Implementation

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What is an Enhancement Implementation

Used to manage enhancements

Enhancement Implementations are created by the customer

An enhancement can/must be a part of only one enhancement implementation

An enhancement implementation can contain multiple enhancements

An 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.

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Representation of Spot and Implementation

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Explicit Options

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Source Code Plug-in

The 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 spots• Multiple active implementations possible and will be executed with no

guarantee in the order of execution.

Enhancement – Section• Can be static or dynamic• Used 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.

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Source Code Plug - in – Editor Modes

Creating enhancement options – Use the Change mode for creating enhancement points or sections– Use the button to switch between change display modes

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

– Use the button to leave the enhancement mode.

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Demos for Explicit Enhancement Options

Demo for Enhancement Point

Demo for Enhancement Section:

•Before Implementation

•After Implementation

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BADI Enhancement Option

What are BADIs ?– Business Add – Ins

– Is an anticipated point of exception – these points act like sockets and exist in the original coding

– has well defined interface in contrast to source code plug-ins and is more stable to changes in the original code

Kernel BADIs – New Features– Can be switched by switch framework

– Integrated directly in the ABAP language runtime

– Improved filter support (non-character filter types)

– Enable Reusable Implementations – Stateful BADI

– Control lifetime of Implementations – BADI-Context

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BADI Enhancement Option - Comparison

The new BADI has several advantages over the classic BADIs

Classic BADI New BADI

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Demo for Kernel BADI

•Creation of Enhancement Spot fro BADI

•Creation of Enhancement Implementation for BADI

•Call of the BADI from the program

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Implicit Options

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Source code (Specified points) options :

These are enhancement options at predefined points in a program :

At the end of an Include

At the end of a private, public or a static section of a class

At the end of an implementation for a class

At the end of an interface definition

At the end of structure definitions

At the start of a procedure (Subroutine, Method, Function)

At the end of a procedure

At 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.

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Parameter Enhancement Option

The parameter enhancement option provides an option to add new parameters to a function module interface

The 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

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Class Enhancement Option

Using the class enhancement options you can :

Add new methods to a class / interface

Add new attributes (Public / Private / Protected)

Add pre or post methods to an existing method

Demo for Class Enhancement Option

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