Java Reactive Programming with Project Reactor

Modern applications must handle massive amounts of concurrent traffic without wasting system resources. Traditional blocking thread models struggle under heavy loads, making reactive programming an essential skill for modern Java developers. This course guides you through transitioning from imperative programming to the reactive, non-blocking paradigm. You will read, analyze, and write clean asynchronous code using Project Reactor, enabling you to build responsive, resilient, and highly scalable microservices. What you'll learn: - Understand foundational reactive concepts, the Reactive Streams specification, and how data flows through publishers and subscribers. - Implement asynchronous pipelines using Mono and Flux to handle single and multiple data streams efficiently. - Apply operators to transform, filter, combine, and batch data streams without blocking execution threads. - Manage backpressure and stream flow control to prevent fast data producers from overwhelming slow consumers. - Configure threading models and schedulers to optimize resource utilization across different processing stages. - Implement robust error-handling, retry strategies, and write unit tests for reactive pipelines using StepVerifier. - Compare reactive patterns with modern Java virtual threads to choose the right concurrency model for your architecture. You will start with core terminology and the theory behind non-blocking I/O before diving into practical code examples. The material progresses logically from basic stream creation to complex operator chains, concurrency management, and testing strategies. This course is designed for Java developers who want to transition to reactive architectures. A basic understanding of standard Java syntax is recommended, but no prior experience with reactive programming or Project Reactor is required. Start reading today to build highly responsive, resource-efficient Java applications.