Kafka consumer APIs

Like Kafka producer, Kafka also provides a rich set of APIs to develop a consumer application. In previous sections of this chapter, you have learned about internal concepts of consumer, working of consumer within a consumer group, and partition rebalance. We will see how this concept helps in building a good consumer application.

• Consumer configuration
• KafkaConsumer object
• Subscription and polling
• Commit and offset
• Additional configuration

Consumer configuration

Creating Kafka consumer also requires a few mandatory properties to be set. There are basically four properties:

• bootstrap.servers: This property is similar to what we defined in Chapter 3, Deep Dive into Kafka Producers, for producer configuration...