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Full Reactive Stack with Spring Boot, WebFlux and MongoDB

Moisés Macero

Learn how to build a full-reactive system from the database (MongoDB reactive) to the front-end (Angular), using a Reactive programming strategy leveraged by Spring WebFlux, with the simplicity offered by Spring Boot 2. Includes a comparison with the standard MVC approach, covering the main aspects (simplicity, performance, etc.).

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About

About

About the Book

Backend

You will learn how to develop Reactive Web endpoints using Spring Reactor and Spring WebFlux, the alternative to MVC. To make it full-reactive, you will use MongoDB since it provides a reactive driver integrated with Spring Data.

Frontend

This book shows how to build a simple Angular application (since the book focuses more on the backend) that uses RxJS and EventSource to connect to the reactive flow provided by the backend (supported by WebSockets).

Docker

To make easier the build and deploy of the application, the source code includes docker-compose files that you can use to run the complete reactive stack.

Benchmark and WebFlux vs. MVC analysis

The last chapter is focused on comparing MVC with WebFlux in a practical way, and analysing what are the pros/cons depending on your use case.

Source Code

All the source code related to this book is available on GitHub.

Note: This mini-book is based on the posts Full Reactive Stack Guide, but their format has been adapted so it's easier to read as a complete guide.

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Author

About the Author

Moisés Macero

I'm developing software since I was a kid, when my parents bought me a Spectrum ZX (in which I also played great videogames...). I've worked at startups, where a developer is a real full-stack developer (from frontend to backend, from building to maintaining, from the cave to customer-facing meetings) and also at big companies, where stability and keeping high product quality standards is a must. Along my career I have been involved usually in development, design and architecture, for small and huge projects. Worked in waterfall and agile environments.

Now I'm working at a Dutch company as Solutions Architect for a project based on microservices. I like keeping ways of working as practical as possible but, at the same time, producing proper documentation and sharing knowledge.

I'm the author of the blog about software development The Practical Developer: https://thepracticaldeveloper.com and the book Learn Microservices with Spring Boot.

Contents

Table of Contents

Chapter 1: The Reactive Web

  1. Reactive Web Patterns
  2. WebFlux and Project Reactor
  3. Reactive Web: Advantages
  4. Is Non-Blocking the same as Reactive?
  5. The application

Chapter 2: Full Reactive Stack Backend

  1. Project Reactor – Main Features
  2. WebFlux – Main Features
  3. Creating the application
  4. Repository Layer
  5. The Reactive Controller
  6. The Blocking Controller and Repository
  7. Loading data into MongoDB with an ApplicationRunner
  8. Running the backend
  9. Playing with Reactive and Classic endpoints

Chapter 3: Connecting Angular with the WebFlux Backend

  1. Goal
  2. Why Angular?
  3. Creating the Angular application
  4. UI Application Overview
  5. The Angular Reactive service
  6. The Angular Components – Quick Overview
  7. Running the frontend

Chapter 4: Conclusions

  1. WebFlux vs. Blocking (MVC): user experience
  2. WebFlux vs. Blocking (MVC): performance
  3. WebFlux vs. Blocking (MVC): ease of development
  4. Suitability
  5. Testing
  6. Conclusions

Appendix: Running the application in Docker

  1. Generate the build artifacts
  2. Build and run the Spring Boot app in Docker
  3. Build the Angular app and run it in Docker
  4. Putting everything together with Docker Compose

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