Reactive Programming Fundamentals: WebFlux vs Blocking Java

When building modern Java applications, choosing the right concurrency model is critical for performance, scalability, and resource utilization. This text-based course guides you through the fundamental differences between reactive programming with WebFlux and the traditional blocking thread-per-request approach. You will understand how these paradigms handle requests under the hood and when to apply each model. By completing this course, you will gain a clear mental model of non-blocking I/O, event loops, and reactive streams, allowing you to make informed architectural decisions for your backend systems. What you'll learn: - Understand the core concepts of reactive programming and the Reactive Streams specification - Compare the resource consumption of the thread-per-request model against the event-loop model - Analyze how WebFlux achieves high concurrency with fewer system threads - Identify the trade-offs, limitations, and debugging challenges of non-blocking architectures - Apply best practices for integrating database drivers and external APIs in reactive pipelines - Determine when to use WebFlux and when to stick with traditional blocking Spring MVC We start with the foundational definitions of blocking vs. non-blocking operations, then dive into architectural comparisons, and finish with practical scenarios and decision frameworks to test your understanding. Designed entirely as a structured reading and self-assessment program, this course requires only a basic familiarity with Java and web development concepts. Start reading today to master the architectural patterns of modern high-scale Java applications.