Re: User exits, BAPI & BAdI

Question

Dear gurus,
I have several questions, which may be quite general to some if you but I hope someone can assist to give me full detail information: -
1. What is user exits? How it is used? How to configure in Customizing? Details appreciated on the customizing steps.
2. What is the difference between BAPI and BAdI? How is it used? Customizing techniques and steps?
Thanks.
Full points will be awarded if helpful.
Rgds.

Answer 1

Hi,
User exit - A user exit is a three character code that instructs the system to access a program during system processing.
SXX: S is for standard exits that are delivered by SAP.   XX represents the 2-digit exit number.
UXX: U is for user exits that are defined by the user.  XX represents the 2-digit exit number
Customer exit - The R/3 enhancement concept allows you to add your own functionality to SAP’s standard business applications without having to modify the original applications. SAP creates customer exits for specific programs, screens, and menus within standard R/3 applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.     *-- Mani
The following document is about exits in SAP :-
The R/3 enhancement concept allows you to add your own functionality to SAP’s standard business applications without having to modify the original applications. 
SAP creates user exits for specific programs, screens, and menus within standard R/3 applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.
Types of Exits 
There are several different types of user exits. Each of these exits acts as hooks where you can attach or "hang" your own add-ons.
Menu Exits
Menu exits add items to the pulldown menus in standard SAP applications. You can use these menu items to call up your own screens or to trigger entire add-on applications.
SAP creates menu exits by defining special menu items in the Menu Painter. These special entries have function codes that begin with "+" (a plus sign). You specify the menu item’s text when activating the item in an add-on project.
Screen Exits
Screen exits add fields to screens in R/3 applications. SAP creates screen exits by placing special subscreen areas on a standard R/3 screen and calling a customer subscreen from the standard screen’s flow logic.
Function Module Exits 
Function module exits add functions to R/3 applications. Function module exits play a role in both menu and screen exits. 
When you add a new menu item to a standard pull down menu, you use a function module exit to define the actions that should take place once your menu is activated. 
Function module exits also control the data flow between standard programs and screen exit fields. SAP application developers create function module exits by writing calls to customer functions into the source code of standard R/3 programs. 
These calls have the following syntax: 
CALL CUSTOMER-FUNCTION ‘001’.
Field Exits
Field exits allow you to create your own programming logic for any data element in the Dictionary. You can use this logic to carry out checks, conversions, or business-related processing for any screen field.  Example: The data element BBBNR identifies a company’s international location number. You might want to set up your R/3 System so that all international location numbers are larger than 100. 
The field exit concept lets you create a special function module that contains this logic. 
You assign the special function module to the data element BBBNR. You then assign the module to any programs and screens in which users can add new international location numbers. When you activate your field exit, the system automatically triggers your special routine whenever a user enters a company location number. 
In 4.6c, you can use "RSMODPRF" program to create field exits.
An example of a user exits :-
MODULE user_exit_0001 INPUT 
    CASE okcode.
        WHEN 'BACK OR EXIT'.
            CASE sy-dynnr.
                    WHEN '100'.
                         SET SCREEN 0.
                         LEAVE SCREEN.
2.HOW TO FIND BADIO OR USEREXIT CUT AND PATE THI SPROG RAM IN SE38 NAD CLICK ON F8 AND PROVIDE UINPUT WHICH TCODE U WANT
orrun this report u get the corresponding badi associated with perticular transaction
*& Report ZNEGI16 *
REPORT ZNEGI16 .
TABLES : TSTC,
TADIR,
MODSAPT,
MODACT,
TRDIR,
TFDIR,
ENLFDIR,
SXS_ATTRT ,
TSTCT.
DATA : JTAB LIKE TADIR OCCURS 0 WITH HEADER LINE.
DATA : FIELD1(30).
DATA : V_DEVCLASS LIKE TADIR-DEVCLASS.
PARAMETERS : P_TCODE LIKE TSTC-TCODE,
P_PGMNA LIKE TSTC-PGMNA .
DATA wa_tadir type tadir.
START-OF-SELECTION.
IF NOT P_TCODE IS INITIAL.
SELECT SINGLE * FROM TSTC WHERE TCODE EQ P_TCODE.
ELSEIF NOT P_PGMNA IS INITIAL.
TSTC-PGMNA = P_PGMNA.
ENDIF.
IF SY-SUBRC EQ 0.
SELECT SINGLE * FROM TADIR
WHERE PGMID = 'R3TR'
AND OBJECT = 'PROG'
AND OBJ_NAME = TSTC-PGMNA.
MOVE : TADIR-DEVCLASS TO V_DEVCLASS.
IF SY-SUBRC NE 0.
SELECT SINGLE * FROM TRDIR
WHERE NAME = TSTC-PGMNA.
IF TRDIR-SUBC EQ 'F'.
SELECT SINGLE * FROM TFDIR
WHERE PNAME = TSTC-PGMNA.
SELECT SINGLE * FROM ENLFDIR
WHERE FUNCNAME = TFDIR-FUNCNAME.
SELECT SINGLE * FROM TADIR
WHERE PGMID = 'R3TR'
AND OBJECT = 'FUGR'
AND OBJ_NAME EQ ENLFDIR-AREA.
MOVE : TADIR-DEVCLASS TO V_DEVCLASS.
ENDIF.
ENDIF.
SELECT * FROM TADIR INTO TABLE JTAB
WHERE PGMID = 'R3TR'
AND OBJECT in ('SMOD', 'SXSD')
AND DEVCLASS = V_DEVCLASS.
SELECT SINGLE * FROM TSTCT
WHERE SPRSL EQ SY-LANGU
AND TCODE EQ P_TCODE.
FORMAT COLOR COL_POSITIVE INTENSIFIED OFF.
WRITE:/(19) 'Transaction Code - ',
20(20) P_TCODE,
45(50) TSTCT-TTEXT.
SKIP.
IF NOT JTAB[] IS INITIAL.
WRITE:/(105) SY-ULINE.
FORMAT COLOR COL_HEADING INTENSIFIED ON.
Sorting the internal Table
sort jtab by OBJECT.
data : wf_txt(60) type c,
wf_smod type i ,
wf_badi type i ,
wf_object2(30) type C.
clear : wf_smod, wf_badi , wf_object2.
Get the total SMOD.
LOOP AT JTAB into wa_tadir.
at first.
FORMAT COLOR COL_HEADING INTENSIFIED ON.
WRITE:/1 SY-VLINE,
2 'Enhancement/ Business Add-in',
41 SY-VLINE ,
42 'Description',
105 SY-VLINE.
WRITE:/(105) SY-ULINE.
endat.
clear wf_txt.
at new object.
if wa_tadir-object = 'SMOD'.
wf_object2 = 'Enhancement' .
elseif wa_tadir-object = 'SXSD'.
wf_object2 = ' Business Add-in'.
endif.
FORMAT COLOR COL_GROUP INTENSIFIED ON.
WRITE:/1 SY-VLINE,
2 wf_object2,
105 SY-VLINE.
endat.
case wa_tadir-object.
when 'SMOD'.
wf_smod = wf_smod + 1.
SELECT SINGLE MODTEXT into wf_txt
FROM MODSAPT
WHERE SPRSL = SY-LANGU
AND NAME = wa_tadir-OBJ_NAME.
FORMAT COLOR COL_NORMAL INTENSIFIED OFF.
when 'SXSD'.
For BADis
wf_badi = wf_badi + 1 .
select single TEXT into wf_txt
from SXS_ATTRT
where sprsl = sy-langu
and EXIT_NAME = wa_tadir-OBJ_NAME.
FORMAT COLOR COL_NORMAL INTENSIFIED ON.
endcase.
WRITE:/1 SY-VLINE,
2 wa_tadir-OBJ_NAME hotspot on,
41 SY-VLINE ,
42 wf_txt,
105 SY-VLINE.
AT END OF object.
write : /(105) sy-ULINE.
ENDAT.
ENDLOOP.
WRITE:/(105) SY-ULINE.
SKIP.
FORMAT COLOR COL_TOTAL INTENSIFIED ON.
WRITE:/ 'No.of Exits:' , wf_smod.
WRITE:/ 'No.of BADis:' , wf_badi.
ELSE.
FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
WRITE:/(105) 'No userexits or BADis exist'.
ENDIF.
ELSE.
FORMAT COLOR COL_NEGATIVE INTENSIFIED ON.
WRITE:/(105) 'Transaction does not exist'.
ENDIF.
AT LINE-SELECTION.
data : wf_object type tadir-object.
clear wf_object.
GET CURSOR FIELD FIELD1.
CHECK FIELD1(8) EQ 'WA_TADIR'.
read table jtab with key obj_name = sy-lisel+1(20).
move jtab-object to wf_object.
case wf_object.
when 'SMOD'.
SET PARAMETER ID 'MON' FIELD SY-LISEL+1(10).
CALL TRANSACTION 'SMOD' AND SKIP FIRST SCREEN.
when 'SXSD'.
SET PARAMETER ID 'EXN' FIELD SY-LISEL+1(20).
CALL TRANSACTION 'SE18' AND SKIP FIRST SCREEN.
endcase.
or
There are multiple ways of searching for BADI.
• Finding BADI Using CL_EXITHANDLER=>GET_INSTANCE
• Finding BADI Using SQL Trace (TCODE-ST05).
• Finding BADI Using Repository Information System (TCODE- SE84).
•Finding BADI Using CL_EXITHANDLER=>GET_INSTANCE
Go to the Transaction, for which we want to find the BADI,
Get the Program Name of Corresponding Transaction.
(Click on System->Status. Double Click on Program Name)
Once inside the program search for ‘CL_EXITHANDLER=>GET_INSTANCE’.
Make sure the radio button “In main program” is checked.
A list of all the programs with call to the BADI’s will be listed.
The export parameter ‘EXIT_NAME’ for the method GET_INSTANCE of class CL_EXITHANDLER will have the user exit assigned to it.
The changing parameter ‘INSTANCE’ will have the interface assigned to it.
•Finding BADI Using SQL Trace (TCODE-ST05).
/people/alwin.vandeput2/blog/2006/04/13/how-to-search-for-badis-trace-it
•Finding BADI Using Repository Information System (TCODE- SE84).
Go to “Maintain Transaction” (TCODE- SE93).
Enter the Transaction VD02 for which you want to find BADI.
Click on the Display push buttons.
Get the Package Name. (Package VS in this case)
Go to TCode: SE84->Enhancements->Business Add-inns->Definition
Enter the Package Name and Execute.
BAPIS
SAP created the Business Framework to allow the technical integration and exchange of business data among SAP components and between SAP and non-SAP components. Important components of the Business Framework are the Business Application Programming Interfaces (BAPIs), which represent visible interfaces at the component boundaries and whose properties serve to integrate these components. 
The integration can include both components within a local network and components that are connected with one another through the Internet.
BAPIs allow integration at the business level, not the technical level. This provides for greater stability in the link, and independence from the underlying communication technology.
You can get all the standard SAP BAPI functions with the transactions code 'BAPI'.
thanks mate,
points if helpful,
Phani.