What you need for this book
This book was written using Elasticsearch server 1.4.x, and all the examples and functions should work with it. In addition to that, you'll need a command that allows you to send HTTP requests such as curl, which is available for most operating systems. Please note that all examples in this book use the mentioned curl tool. If you want to use another tool, please remember to format the request in an appropriate way that is understood by the tool of your choice.
In addition to that, to run examples in Chapter 9, Developing Elasticsearch Plugins, you will need a Java Development Kit (JDK) installed and an editor that will allow you to develop your code (or Java IDE-like Eclipse). To build the code and manage dependencies in Chapter 9, Developing Elasticsearch Plugins, we are using Apache Maven.
