Book Image

Clojure for Java Developers

Book Image

Clojure for Java Developers

Overview of this book

We have reached a point where machines are not getting much faster, software projects need to be delivered quickly, and high quality in software is more demanding as ever. We need to explore new ways of writing software that helps achieve those goals. Clojure offers a new possibility of writing high quality, multi-core software faster than ever, without having to leave your current platform. Clojure for Java developers aims at unleashing the true potential of the Clojure language to use it in your projects. The book begins with the installation and setup of the Clojure environment before moving on to explore the language in-depth. Get acquainted with its various features such as functional programming, concurrency, etc. with the help of example projects. Additionally, you will also, learn how the tooling works, and how it interacts with the Java environment. By the end of this book, you will have a firm grip on Clojure and its features, and use them effectively to write more robust programs.
Table of Contents (14 chapters)
Clojure for Java Developers
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Chapter 6. Concurrency

Programming has changed, in the past we could just rely on computers getting faster year after year. This is proving to be more and more difficult; so, hardware manufacturers are taking a different approach. Now, they are embedding more processors into computers. Nowadays, it's not uncommon to see phones with just or four cores.

This calls for a different way of writing software, one in which we are able to execute some tasks in other processes, explicitly. The modern languages are trying to make this task feasible and easier for modern developers, and Clojure is no exception.

In this chapter, we will see how Clojure enables you to write simple concurrent programs by reviewing Clojure's core concepts and primitives; in particular, we need to understand the concept of identity and value that Clojure has embedded into the language. In this chapter, we will cover the following topics:

  • Using your Java knowledge

  • The Clojure model of state and identity

  • Promises

  • Futures

  • Software...