Asynchronous Java: The Complete Guide

In the modern world of high-load systems and microservice architecture, the ability to write asynchronous code in Java is not just an advantage, but a necessity. The book "Asynchronous Java: The Complete Guide" by author Alexey Sokolov is a comprehensive resource that will take you from the basic concepts of multithreading to the most modern approaches, including Project Loom and reactive programming.

What is this book about?

This is a practical guide that not only explains the theory but also shows how to apply asynchronous patterns in real projects. You will learn how to effectively use CompletableFuture to build chains of asynchronous operations, master reactive streams (Reactive Streams) and libraries like RxJava and Project Reactor, and get acquainted with the future of Java — Project Loom virtual threads.

Book structure:

• Part 1. The Foundation. Analysis of the Java memory model, threads, synchronization, and common errors (deadlock, race condition).
• Part 2. CompletableFuture. Creating, combining, error handling, and canceling asynchronous tasks. Real-world cases: parallel HTTP requests, data aggregation.
• Part 3. Reactive Programming. Principles of the Reactive Manifesto, working with Flux and Mono, backpressure, integration with Spring WebFlux.
• Part 4. Project Loom. Virtual Threads, Structured Concurrency, performance comparison with classic threads.
• Part 5. Advanced Topics. Asynchronous databases (R2DBC), testing asynchronous code, monitoring and profiling.

Who is this book for?

• Junior and Middle Java developers who want to level up and write scalable applications.
• Senior developers looking to systematize their knowledge of Concurrency and study Project Loom.
• Software architects designing high-load systems and microservices.

What will you learn?

• How to avoid locks and efficiently manage thread pools.
• How to build complex asynchronous chains using thenApply, thenCompose, allOf.
• How to handle errors in asynchronous code without losing context.
• How to use reactive streams for real-time data processing.
• How Project Loom virtual threads simplify writing asynchronous code.

The book contains over 50 practical examples with explanations and ready-to-use code. All examples can be run on Java 21+.

"Asynchronous Java: The Complete Guide" is your guide to the world of high-performance, non-blocking, and modern Java programming. Start writing code that scales, today!