Generating snappy compressed avro files as hadoop map reduce input files

[David Ginzburg]

Hi,

I am writing an application that produces avro record files , to be stored on 
AWS S3 as possible input to EMR.
I would like to compress with snappy codec before storing them on S3.
It is my understanding that hadoop currently uses a different snappy codec, 
mostly used as intermediate map output format .
My question is how can I generate within my application logic (not MR) snappy 
compressed avro files?