Hi abaper

Question

can any one suggest me the simple procedure to create a simple badi.its urgent
thanks

Answer 1

Hi
What are BAdIs?
•     is an anticipated point of extension – these points act like sockets and exist in the original source code
•      based on ABAP Objects. BAdI defines an interface that can be implemented by BAdI-implementations that are transport objects of their own
•      Important! There are 2 roles: Enhancement Option-provider & Implementer.
•      In the above context, Enhancement Implementation can be done only if option (hook) is provided by the Option-provider. In simple words there are no implicit BAdIs.
Note: In the following slides, Definitions are created so as to understand the method of BAdI definition & for example purpose. As stated above this is the role of Enhancement Option-Provider.
Classic BAdIs already exist since SAP Release 4.6
BAdIs have been Re-implemented in ECC7.0 under the new Enhancement Framework & Switch Framework
Classic BAdIs
•     To understand what a powerful pattern a BAdI is, we will now define & then implement a BAdI
BADI Class is created automatically.
The various options are described below in detail:
1. Enhanceable: Enhanceability of filter types can only be specified for filter-dependent BADI definitions under very special conditions. For example, the domain belonging to the filter type must be linked with a value table that is of the type E or G. A BADI implementation can then be created in one step by creating a new filter value that is automatically entered into the value table at save and also copied into the transport order of the BADI implementation. In addition, it is also possible to create a new filter value and, at the same time, a BADI implementation with the same name. Naturally, you can also specify existing filter values.
You should select this feature if there is a prerequisite that a new filter value is created together with a new BADI implementation - that is, that BADI implementations are not created solely with existing filter values, although this, too, is possible.
2. Multiple-Use
3. Filter-Dependent
Instance Methods can access all of the attributes of a class and can trigger all events of a class. Static Methods can only access static attributes and static events.
Adding event handling & exception(s) is not a necessary step…
Exceptions:
Events:
Events can be defined in classes or in interfaces. Corresponding methods can trigger these events with the RAISE EVENT statement. Each class (or interface) that is going to handle the corresponding event must implement a relevant handler method, and register it using the SET HANDLER statement. When an event occurs, the system calls all of the handler methods registered for that event.
Like method definitions, events have a parameter interface. The only difference is that events may only have EXPORTING parameters.
Save and activate the BAdI definition!
BADI Implementation
BAdI Implementation (SE19)
Save and activate the BAdI implementation!
Implementation for SAP provided BAdI…
Roles: (BADI Definition & Implementation)
•     Developer: Enhancement (BAdI) Option-Implementer
•     SAP: Option-Provider
BAdI as a ‘controlled’ Enhancement Option:
•     Option-provider defines the interface and limits the implementer to the class that the implements the BAdI
•     Assured that BAdI implementer can only change the parameters handed over to the BAdI by the option provider
Steps:
1.     Search for the BAdI corresponding to the transaction
2.     Create a custom Implementation for the BAdI by adding code in the appropriate method
3.     Test that the method with custom code is invoked on executing the transaction.
Create Material using MM01. Copy from existing Material.
Select the required views.
Enter mandatory data and click on Save.
Check the Exit Name ‘BADI_MATERIAL_CHECK’. This is the BAdI we are going to implement.
Implementing the BAdI ‘BADI_MATERIAL_CHECK’
Go to SE18 & check the BAdI definition (Methods)
We will be using the ‘CHECK_DATA’ method. Double Click to see the Method Parameters.
Implementing BADI
Go to SE19. Specify a name for the BAdI Implementation.
Enter the Definition Name.
Double-click the method ‘CHECK_DATA’ to enter the source code
Double-click the method ‘CHECK_DATA’ to enter the source code
We are only showing an message in this case; if division in ‘Basic Data’ tab of Material Creation is not entered.
The structure CMARA is defined as ‘Exporting Parameter’. Data can be modified using this.
Activate the Implementation
Testing the BAdI
Testing the BAdI implementation (BADI_MATERIAL_CHECK)
MM01 / MM02 and create / change material and save. On clicking Save, our BADI will trigger.
Message is displayed (Division not entered)
BAdIs…in the new Enhancement Framework (ECC 6.0)
•     How the new BAdIs differ from the Classic BAdI?
•      Good news is that…basic thing about the BAdI remains the same!
•      Differ in the manner in which new BAdI is embedded in the container-structure of the Enhancement Framework
•      Better performance & Lower Memory consumption
•      Evaluates as much information as possible during compile time
•      40-600 times faster than Classic BAdIs
•      Internal handle-class integrated in the SAP Kernel
•      Provides ‘switchable’ implementation(s) through use of Switch Framework
•      Special optimizations with ‘GET BADI’ & ‘CALL BADI’ (new ABAP commands)
•      Implementation Inheritance
Usage of old (classic) BAdIs versus New BAdIs…
•     Two new ABAP commands for the new BAdI:
•      GET BADI  : all active implementations are selected and the method of BAdI is called (amounts to a loop with different method calls in it)
Enhancement Spot as a container for BAdI…
•     Enhancement Framework has containers for BAdI implementations as well