Creating a high-level REST client

A Java high-level REST client is built on top of low-level ones and provides automatic marshaling of requests and responses.

Initially released with ElasticSearch 6.x, this client depends on main Elasticsearch libraries to provide many extra functionalities, such as the following:

• JSON support
• Request/response marshaling/unmarshaling that provides stronger typed programming
• Support for both synchronous and asynchronous calls

Getting ready

You need an up-and-running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 1, Getting Started.

To correctly execute the following commands, you will need an index populated...