spew only the number of times the pattern was found

[mnikhil-git]

Hi @jordansissel,

I was going through grok to see if it is possible to spew the number of times the pattern was found.
Instead of emitting all the patterns found, is it possible to aggregate the number of times the specific pattern/message was found and emit the number and the message instead of just a filter?

Thank you for the help.