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
About the Authors
About the Reviewer

Using Kafka

Apache Kafka is a fast, scalable, durable, and distributed messaging system developed by LinkedIn. We will use Kafka using clj-kafka. It's a Clojure wrapper.

Getting ready

We need to install Kafka for this recipe. The installation steps of Kafka are as follows.

Downloading Kafka

First, download Kafka using the wget command:

$ wget

Then, extract Kafka files from the downloaded TAR file:

$ tar xzvf kafka_2.11-

Start ZooKeeper and Kafka server

Go to the Kafka directory and run ZooKeeper and Kafka server:

$ cd kafka_2.11- 
$ bin/ config/

The preceding ZooKeeper startup command will show you the following output:

Then, we will start kafka-server:

$ bin/ config/

The preceding command will show you the following output:

Create topic

Create topic names test:

$ bin/ --create ...