Step by Step guide for BADI Multiple use implementation

By Vijayendra Krishnamurthy Rao, Hewlett-Packard

Step 1 à Enter a BADI Definition name and Click on the CREATE button.

Enter a short description and under the TYPE section choose if you wish to have multiple implementation or a Filter object to the BADI.

See F1 help on the multiple use and Filter to find more details

Click on Save and create a TP

 

Step 2 à Define the Interface

Use the menu GOTO à INTERFACE or simply double click on the interface name under the interface tab.

Enter the method name and define the methods parameters in the interface.

Select the method and click on the parameters button to enter the parameters for the method.

Click on Save and return back to the initial screen.

Follow the steps above to enter more methods if you wish too.

Parameters for the second method.

Click on save and activate to activate the custom BADI.

If there is any inconsistencies in the BADI definition and the interface definition the system will throw a warning message as shown below

Based on the selection the system will automatically adjust the BADI definition or interface.

In our case the system adjusted the parameters for the methods. It changed the Exporting parameter to the Changing parameters

 

Step 3 à Create the Implementation for the BADI. You can either go to TCode SE19 or use the menu option Implementation à Create as shown in the screen shot below.

Enter the name of the BADI implementation you wish to create and click on the continue button.

On the next screen enter a description for the implementation and click on the save button and create TP subsequently.

Click on the interface tab

And double click on the method you wish to implement in the current BADI implementation. Write the code to achieve the functionality of the method.

Click on the execute button to test the method.

On the next screen click on the Edit Interface view button or the display icon next to the ZIF_EX_MYBADI node.

Now click on the execute button against the method to execute the functionality.

Enter the required parameters and click on execute to see the results or the output or the outcome of the method execution.

Similarly finish the coding for the other methods.

Once done do the testing and see if it works fine

Once the testing is done. Return to the main screen and activate the implementation of the BADI.

So far what we have seen is only ONE IMPLEMENTATION of the BADI. We have not done MULTIPLE IMPLENTATION so far. We will now proceed to write a simple program.

 

As seen above the program is very simple and has the following components.

1. Data declaration (Type ref and any other data variables as required) 2. Call to the method CL_EXITHANDLER to get the implementation name of the BADI 3. Using the instance, call the method which has been implemented for the BADI.

To call the method you can use the PATTERN option as shown below from the ABAP editor.

Do a CTRL + F6 to get the pattern button or click on the PATTERN button from the application tool bar. Select the ABAP OBJECT patterns radiobutton and click on the continue button.

On the next screen enter the class name and the method to be called as shown below

It does not matter whether you are calling the static method or the instance method. Click on the continue button.

Make changes as required and pass the respective parameters. In the above case we changed the EXIT_NAME and the INSTANCE parameters.

Now call the method from the interface using the interface reference l_BADI_INSTANCE as shown below

Enter the parameters required and any additional code required for the report.

Run the report and you will get the output as shown below

Now lets go back and create a new IMPLEMENTATION in SE19 as we have enabled MULTIPLE USE in the BADI DEFINITION.

Go to SE19 and enter a new name and click on the create button

And when asked for the definition enter the same definition name.

And click on the continue button.

Enter a meaningful description and save and activate the second implementation. Next double click on the method you wish to implement and write the code.

 

As seen above in the second implementation we have hard coded the value for the email id instead of getting the value from the tables. Save and activate the method and then return to the main screen and activate the implantation again.

Now try to go to each of the implementation and place a breakpoint at the methods. So we first go to the implementation 1 and place a break point as shown below.

And similarly go to the second implementation and place a breakpoint on the method as shown below

Once done. Go to SE38 and execute the program developed in earlier steps. You will notice that the program will stop at both the breakpoints as the system triggers all the implementations if there is more than one for a multiple use BADI.

Now if you check the value of the variable emailed then you will notice that the emailed is fetched from the database.

Now click F7 till you reach to the next breakpoint or the next implementation

So if you see from the above screen. The cursor is at the second implementation and the value of the email-id is still available in the second implementation.

Now if you execute one step, the value of email-id will be overwritten as shown below.

And once you execute completely you get the output of the report.

PLEASE NOTE: in our case the system first executed the FIRST BADI IMPLEMENTATION and later it executed the SECOND BADI IMPLENETATION. However this sequence is dynamic and there is no guarantee that this sequence will be maintained all the time.