Book Image

Clojure Programming Cookbook

Book Image

Clojure Programming Cookbook

Overview of this book

When it comes to learning and using a new language you need an effective guide to be by your side when things get rough. For Clojure developers, these recipes have everything you need to take on everything this language offers. This book is divided into three high impact sections. The first section gives you an introduction to live programming and best practices. We show you how to interact with your connections by manipulating, transforming, and merging collections. You’ll learn how to work with macros, protocols, multi-methods, and transducers. We’ll also teach you how to work with languages such as Java, and Scala. The next section deals with intermediate-level content and enhances your Clojure skills, here we’ll teach you concurrency programming with Clojure for high performance. We will provide you with advanced best practices, tips on Clojure programming, and show you how to work with Clojure while developing applications. In the final section you will learn how to test, deploy and analyze websocket behavior when your app is deployed in the cloud. Finally, we will take you through DevOps. Developing with Clojure has never been easier with these recipes by your side!
Table of Contents (16 chapters)
Clojure Programming Cookbook
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface

Clojure with Vaadin - easy web widgets


Vaadin has been around for quite some time and is known to be an all coding-based UI framework for web applications. There are many frameworks out there for just doing web work of course, and even in this chapter we introduce some of the famous ones based on JavaScript libraries.

Vaadin proposes to have a consistent set of easy-to-use widgets, that usually would be Java written. With a bit of Clojure magic, but mostly some ways of bridging the gap between compiled code and scripting, you can now use your favorite language to script the UI using those widgets and see updates in real time. In this recipe, you will also be introduced again to some reactive programming concepts in the scope of Vaadin with Clojure. Enjoy!

Getting ready

To begin with programming in Clojure/Vaadin, you will start by setting up the project.clj file with some easy but specific settings. Let's see what is inside.

Project settings

To use the Vaadin classes, we will import the necessary...