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.

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Clojure for Java Developers
Feb, 2016 | 156 pages
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Table of Contents (14 chapters)
Clojure for Java Developers
Clojure for Java Developers
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with Clojure
Getting Started with Clojure
Getting to know Clojure
Installing Leiningen
Using a REPL
Creating a new project
Using Cursive Clojure
Getting started with Clojure code and data
Clojure's data types
Summary
2
Namespaces, Packages, and Tests
Namespaces, Packages, and Tests
Namespaces in Clojure
The classpath and the classloader
Testing in Clojure
Summary
3
Interacting with Java
Interacting with Java
Using Maven dependencies
Clojure interop syntax
Writing a simple image namespace
Writing the tests
Destructuring in Clojure
Exposing your code to Java
Proxy and reify
Summary
4
Collections and Functional Programming
Collections and Functional Programming
Basics of functional programming
Persistent collections
Types of collections in Clojure
The sequence abstraction
Specific collection types in Clojure
Summary
5
Multimethods and Protocols
Multimethods and Protocols
Polymorphism in Java
Multimethods in Clojure
Protocols in Clojure
Summary
6
Concurrency
Concurrency
Using your Java knowledge
The Clojure model of state and identity
Promises
Futures
Software transactional memory and refs
Atoms
Agents
core.async
Summary
7
Macros in Clojure
Macros in Clojure
Lisp's foundational ideas
Macros as code modification tools
Writing your first macro
Debugging your first macro
Macros in the real world
References
Summary
Index
Index

About the Reviewer

Ning Sun is a software engineer currently working for a China-based startup, LeanCloud, providing one-stop "backend as a service" for mobile apps. Being a startup engineer, he has to solve various kinds of problems and play different kinds of roles; however, he has always been an enthusiast for open source technology. He contributes to several open source projects and has also learned a lot from them.

At LeanCloud, he built a messaging system that supports tens of millions of clients per day. The system is fully powered by Clojure and its ecosystem. He has been an early member of Clojure Chinese community since 2011. He has delivered talks at several meetups and has been very active in the mailing list and open source projects. Ning created Clojure RPC library "Slacker", which is widely used at LeanCloud and several other companies.

He worked on https://Delicious.com in 2013, which is known as one of the most important websites in the early Web 2.0 era.

He has been a reviewer of two books about Solr at Packt Publishing. Also, he was the reviewer of Programming Clojure, Chinese edition.

You can always find him on Github.com/sunng87 and Twitter.com/Sunng.

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