title: In flight message transformation in Kafka Connect
body: <p>For a requirement we are putting together following data pipe line.<br>
  IBM MQ (Source) -> Kafka Connect -> Streaming API (Kafka/Flink/Spark) -> DB (Sink).<br>
  I wanted to check is there any option to perform message encoding transformation (custom) at the Kafka Connect layer or before message reaches kafka/kafka connect cluster.<br>
  The option should not add significant latency to the data pipe line.</p>