EventExists will check to see if an event has already been processed.

HandleError will publish an error event to Kafka.

Health returns a HTTP 200 status code indicating the service is alive.

InsertEvent will insert a row into the processed_events table to indicate an event was processed.

NewDB returns a default localhost reference to a DB.

ReceiveOrder handler will accept an order, validate the payload and publish an OrderReceived event to Kafka.

Root returns a HTTP 200 status code.

DB represents an interaction with a database.

Server represents the web server hosting the service.