zooniverse/Panoptes — pull request #210 by edpaget (2014-10-16 22:01:58+00:00)
Title: Add Sidekiq and Kafka. 

Also:
+ KafkaEvent to publish arbitrary info about models, still kind of a work in progress
+ ClassificationLifecycle management moved to a sidekiq worker
+ MultiKafkaProducer Module to abstract between jruby-kafka and poseidon.

When running jruby you'll also need to use jbundler to manage Kafka libraries.