Book Image

Mastering Elasticsearch 5.x - Third Edition

By : Bharvi Dixit
Book Image

Mastering Elasticsearch 5.x - Third Edition

By: Bharvi Dixit

Overview of this book

Elasticsearch is a modern, fast, distributed, scalable, fault tolerant, and open source search and analytics engine. Elasticsearch leverages the capabilities of Apache Lucene, and provides a new level of control over how you can index and search even huge sets of data. This book will give you a brief recap of the basics and also introduce you to the new features of Elasticsearch 5. We will guide you through the intermediate and advanced functionalities of Elasticsearch, such as querying, indexing, searching, and modifying data. We’ll also explore advanced concepts, including aggregation, index control, sharding, replication, and clustering. We’ll show you the modules of monitoring and administration available in Elasticsearch, and will also cover backup and recovery. You will get an understanding of how you can scale your Elasticsearch cluster to contextualize it and improve its performance. We’ll also show you how you can create your own analysis plugin in Elasticsearch. By the end of the book, you will have all the knowledge necessary to master Elasticsearch and put it to efficient use.
Table of Contents (20 chapters)
Mastering Elasticsearch 5.x - Third Edition
About the Author
About the Reviewer
Customer Feedback

Creating a custom REST action

Let's start the journey of extending Elasticsearch by creating a custom REST action. We've chosen this as the first extension, because we wanted to take the simplest approach as the introduction to extending Elasticsearch.


We assume that you already have a Java project created and that you are using Maven, just like we did in the Creating the Apache Maven project structure section at the beginning of this chapter. If you would like to use an already created and working example and start from there, please look at the code for Chapter 11, Developing Elasticsearch Plugins that is available with the book.

The assumptions

In order to illustrate how to develop a custom REST action, we need to have an idea of how it should work. Our REST action will be really simple - it should return names of all the nodes or names of the nodes that start with the given prefix if the prefix parameter is passed to it. In addition to that, it should only be available when using the...