Complete guide to lambda expressions, method references, built-in functional interfaces (Supplier, Consumer, Function, Predicate, UnaryOperator, BinaryOperator), variable capture rules, and functional composition with andThen/compose.
A **consumer group** is a set of consumers that collectively consume a topic's partitions. Each partition is assigned to exactly one consumer within the group.
Consumer Lag measures how far behind a consumer group is from the latest messages in a topic. It is the most critical health metric for any Kafka-based application.
A **consumer** reads messages from Kafka topics. Unlike traditional queues (push-based), Kafka consumers **pull** messages at their own pace. This gives.
Overview of Open Banking & Consumer Data Right (CDR).
Deep dive into the Confluent Parallel Consumer model for decoupling thread concurrency from partition counts safely.