How can I specify configuration for runtime nodes in Druid?

I want to set up a Druid realtime node for ingestion. http://druid.io/docs/latest/configuration/realtime.html suggests the existence of a specifications file for a real time node that will be passed to the druid.realtime.specFile. But I never found the grammar for this spec file. Can somebody point me to a sample specification file for configuring Druid real-time nodes?

Hi

Sorry for the confusion but what you are trying to use is the legacy realtime node way for doing thing.

I recommend that you start using the new indexing service as described here http://druid.io/docs/0.9.2/development/extensions-core/kafka-ingestion.html