Book Image

Elasticsearch Essentials

By : Bharvi Dixit
Book Image

Elasticsearch Essentials

By: Bharvi Dixit

Overview of this book

With constantly evolving and growing datasets, organizations have the need to find actionable insights for their business. ElasticSearch, which is the world's most advanced search and analytics engine, brings the ability to make massive amounts of data usable in a matter of milliseconds. It not only gives you the power to build blazing fast search solutions over a massive amount of data, but can also serve as a NoSQL data store. This guide will take you on a tour to become a competent developer quickly with a solid knowledge level and understanding of the ElasticSearch core concepts. Starting from the beginning, this book will cover these core concepts, setting up ElasticSearch and various plugins, working with analyzers, and creating mappings. This book provides complete coverage of working with ElasticSearch using Python and performing CRUD operations and aggregation-based analytics, handling document relationships in the NoSQL world, working with geospatial data, and taking data backups. Finally, we’ll show you how to set up and scale ElasticSearch clusters in production environments as well as providing some best practices.
Table of Contents (12 chapters)
11
Index

CRUD operations using Java


In this section, we will go through the Elasticsearch Java client to perform the CRUD operations. To use a Java client of Elasticsearch, you can either build a Maven project (recommended) or simply add Elasticsearch jar files, which ship with the Elasticsearch installation file, into your project classpath.

You can include an Elasticsearch dependency in your Maven project by adding the following code to the project's pom.xml file:

  <dependency>
      <groupId>org.elasticsearch</groupId>
      <artifactId>elasticsearch</artifactId>
      <version>2.0.0</version>
    </dependency>

Connecting with Elasticsearch

To connect with Elasticsearch using its transport client, you need to add the following imports:

import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress...