I know about the functions of the node functions used in graphical mapping. but my problem is I don't know how to use them in real time
hi mohanarangan . functionality is no difference on wheter real time / not
that is depends on requirement(logic).
no'of scenarios examples available in scn so pls refer scn.
As Raj says you can obtain a lot of material with this in the SCN. If was you i would practice every node function and later if i dont understand something i would ask.
First, you should understand the queue and context concept to understand really the mapping concept and why the node function existence. (http://help.sap.com/saphelp_nwpi71/helpdata/EN/35/fb8c4057d5701de10000000a1550b0/frameset.htm)
And finally you practice with the Sankar's link and with other links that you find in SCN like this http://scn.sap.com/thread/1545368
Regards and good luck.