How to apply two levels of filtering during parsing in heavy forwarder?

[meenal901]

I have data on which i want to apply 2 level of filtering before indexing
Let the complete data set be called A

Level1 : On complete data i want to keep only events that match some defined patterns ( regular expressions ) ( let the group of pattern be called as B )
So resulting pattern should be A - B

Level 2 : On the filtered events , i want to reject specified defined patterns and KEEP the remaining one ( Let the patterns be called C )

Result should be A - B - C
All this should happen during parsing stage only

[MuS]

Hi meenal901,

see the docs about filter event data and send to queue for some good examples on this topic.
Create a nullQueue transform for B and a second for C and it should work for you.

cheers, MuS