Spring WebFlux: Reactive Programming for Scalable Web Applications

• An understanding of Java programming
• Experience with web application development
• Familiarity with HTTP and RESTful APIs

Audience

• Java developers new to reactive programming
• Technical leads and architects exploring Spring WebFlux
• Backend engineers seeking to build non-blocking web applications

Spring WebFlux is a reactive programming module within the Spring Framework designed for building non-blocking, event-driven web applications.

This instructor-led, live training (online or onsite) is aimed at beginner-level to intermediate-level Java developers who wish to build scalable and responsive applications using Spring WebFlux.

By the end of this training, participants will be able to:

• Understand the fundamentals of reactive programming with Project Reactor.
• Build and test non-blocking RESTful APIs using Spring WebFlux.
• Integrate WebFlux with databases and external services.
• Apply reactive patterns to real-world application scenarios.

Format of the Course

• Interactive lecture and discussion.
• Lots of exercises and practice.
• Hands-on implementation in a live-lab environment.

Course Customization Options

• To request a customized training for this course, please contact us to arrange.

Introduction to Reactive Programming

• Blocking vs. non-blocking systems
• Reactive Streams specification
• Benefits and use cases

Project Reactor and Mono/Flux

• Publisher, Subscriber, and Subscription
• Working with Mono and Flux
• Error handling and backpressure

Setting Up Spring WebFlux

• Creating a Spring Boot WebFlux project
• Configuring dependencies
• Overview of WebClient vs. RestTemplate

Building Reactive REST APIs

• Defining routes and handlers
• Request mapping with RouterFunction
• Reactive controllers and data binding

Integrating with Databases

• Using R2DBC for reactive SQL
• Working with MongoDB in reactive style
• Connecting to external APIs reactively

Testing WebFlux Applications

• Writing unit tests with StepVerifier
• Integration testing with WebTestClient
• Mocking data sources and services

Performance and Best Practices

• Threading and scheduling in WebFlux
• Debugging reactive code
• Design patterns for scalable reactive apps

Deployment and Real-World Examples

• Deploying WebFlux apps
• CI/CD considerations
• Case studies and usage in production

Summary and Next Steps