Couchbase Kafka Connector 1.2.0 introduces a sample Kafka consumer alongside the existing producer, designed to facilitate interaction between Kafka and Couchbase Server. This release includes a detailed setup guide for creating a local testing environment using Vagrant, VirtualBox, and Ansible, and provides sample code for a "Hello World!" project that demonstrates data flow from Kafka to Couchbase. The guide covers installation instructions, environment provisioning, and running sample applications, which include a generator to create messages, a producer to send data to Kafka, and a consumer to output messages. Additionally, it highlights customization options for filters, encoders, and state serializers to tailor data processing and stream cursor management, encouraging experimentation with the code to suit different development needs.