Unraveling Project Reactor: Your Guide to Reactive Programming
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Unraveling Project Reactor: Your Guide to Reactive Programming

About the Book

This is the ebook version of the book that you can read online for free at my website (PDF coming soon).

As software applications grow increasingly complex, traditional programming approaches can lead to tangled code, race conditions, and other difficulties in managing asynchronous operations and scaling to meet the demand of users.

Reactive programming with Project Reactor offers a robust and elegant solution to these problems. This book provides a comprehensive guide to mastering reactive programming, enabling you to create more responsive, resilient, and scalable applications with ease.

In this book, you will discover:

- What is reactive programming, its principles, and benefits

- How to effectively use the reactive types, Mono and Flux, to handle asynchronous data streams

- A deep dive into powerful reactive operators, with a focus on map and flatMap, to transform and compose data streams

- Strategies for handling errors gracefully, ensuring the smooth operation of your applications

- An exploration of schedulers and threads, allowing you to manage concurrency with precision

- How to utilize the Context API to propagate metadata across your reactive streams

- How to work with blocking calls in a non-blocking environment

- Instructions for testing reactive streams with StepVerifier in many types of scenarios

By the end of this book, you will have gained a solid understanding of reactive programming with Project Reactor, so you can create efficient and scalable Java applications that can tackle the challenges of modern software development with confidence.

About the Author

Esteban Herrera
Esteban Herrera

Esteban Herrera has been developing software for 10+ years, mostly in Java and some things in .NET and iOS. Feel free to contact him at anytime.

Table of Contents

  • Part ONE | Introduction to Reactive Programming
    • Chapter 1. The Problem with Blocking
    • Chapter 2. What is Reactive Programming?
    • Chapter 3. Non-blocking, Asynchronous, and Functional
    • Chapter 4. The Reactive Manifesto
    • Chapter 5. Project Reactor
  • Part TWO | Working with Mono and Flux
    • Chapter 6. The Reactive Streams Specification
    • Chapter 7. Asynchronous Streams in Reactor
    • Chapter 8. Creating a Sequence
    • Chapter 9. Nothing Happens Until You Subscribe
    • Exercises
  • Part THREE | Working with map and flatMap
    • Chapter 10. Operators to Transform Sequences
    • Chapter 11. The map Operator
    • Chapter 12. The flatMap Operator
    • Chapter 13. Using map and flatMap
    • Chapter 14. Upstream and Downstream
    • Exercises
  • Part FOUR | Using Other Reactive Operators
    • Chapter 15. More Operators For Transforming Sequences
    • Chapter 16. Combining Publishers
    • Chapter 17. Combining Actions
    • Chapter 18. Filtering Sequences
    • Chapter 19. Branching on Empty Sequences
    • Chapter 20. Aggregating a Flux
    • Chapter 21. Life Cycle Hooks
    • Exercises
  • Part FIVE | Handling Errors
    • Chapter 22. Introduction to Errors in Reactor
    • Chapter 23. Error-Related Operators
    • Chapter 24. Handling Checked Exceptions
    • Exercises
  • Part SIX | Schedulers and Threads
    • Chapter 25. What is a Scheduler?
    • Chapter 26. Using publishOn
    • Chapter 27. Using subscribeOn
    • Chapter 28. Parallelizing work with ParallelFlux
    • Exercises
  • Part SEVEN | Using a Context
    • Chapter 29. The Problem a Context Solves
    • Chapter 30. The Context API
    • Chapter 31. Writing and Reading the Context
    • Exercises
  • Part EIGHT | Working with Blocking Calls
    • Chapter 32. Going Back to Synchronous Types
    • Chapter 33. Handling Blocking Calls
    • Exercises
  • Part NINE | Testing with StepVerifier
    • Chapter 34. Setting up Tests
    • Chapter 35. Testing a Reactive Sequence with StepVerifier
    • Chapter 36. Testing for Errors
    • Chapter 37. Using Assertions
    • Chapter 38. Testing the Context
    • Chapter 39. Testing Time-based Operators
    • Chapter 40. Testing Control Flow with PublisherProbe
    • Chapter 41. Using Custom Publishers in Tests with TestPublisher
    • Exercises

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