Book Image

Hands-On High Performance with Spring 5

By : Chintan Mehta, Subhash Shah, Pritesh Shah, Prashant Goswami, Dinesh Radadiya
Book Image

Hands-On High Performance with Spring 5

By: Chintan Mehta, Subhash Shah, Pritesh Shah, Prashant Goswami, Dinesh Radadiya

Overview of this book

While writing an application, performance is paramount. Performance tuning for real-world applications often involves activities geared toward detecting bottlenecks. The recent release of Spring 5.0 brings major advancements in the rich API provided by the Spring framework, which means developers need to master its tools and techniques to achieve high performance applications. Hands-On High Performance with Spring 5 begins with the Spring framework's core features, exploring the integration of different Spring projects. It proceeds to evaluate various Spring specifications to identify those adversely affecting performance. You will learn about bean wiring configurations, aspect-oriented programming, database interaction, and Hibernate to focus on the metrics that help identify performance bottlenecks. You will also look at application monitoring, performance optimization, JVM internals, and garbage collection optimization. Lastly, the book will show you how to leverage the microservice architecture to build a high performance and resilient application. By the end of the book, you will have gained an insight into various techniques and solutions to build and troubleshoot high performance Spring-based applications.
Table of Contents (14 chapters)

CompletableFuture with Spring Async

The CompletableFuture class was introduced in Java 8, and it provides a simple way to write asynchronous, multithreaded, non-blocking code. With Spring MVC, it is also possible to use CompletableFuture with controllers, services, and repositories from public methods annotated with @Async. CompletableFuture implements the Future interface, which provides the result of an asynchronous computation.

We can create CompletableFuture in the following simple way:

CompletableFuture<String> completableFuture = new CompletableFuture<String>();

To get the result of this CompletableFuture, we can call the CompletableFuture.get() method. This method will be blocked until Future is completed. For that, we can manually call the CompletableFuture.complete() method to complete Future:

completableFuture.complete("Future is completed")