OpenSearch/docs/groovy-api/client.asciidoc

[[client]]
== Client

Obtaining an Elasticsearch Groovy `GClient` (a `GClient` is a simple
wrapper on top of the Java `Client`) is simple. The most common way to
get a client is by starting an embedded `Node` which acts as a node
within the cluster.


[[node-client]]
=== Node Client

A Node based client is the simplest form to get a `GClient` to start
executing operations against Elasticsearch.

[source,groovy]
--------------------------------------------------
import org.elasticsearch.groovy.client.GClient
import org.elasticsearch.groovy.node.GNode
import static org.elasticsearch.groovy.node.GNodeBuilder.nodeBuilder

// on startup

GNode node = nodeBuilder().node();
GClient client = node.client();

// on shutdown

node.close();
--------------------------------------------------

Since Elasticsearch allows to configure it using JSON based settings,
the configuration itself can be done using a closure that represent the
JSON:

[source,groovy]
--------------------------------------------------
import org.elasticsearch.groovy.node.GNode
import org.elasticsearch.groovy.node.GNodeBuilder
import static org.elasticsearch.groovy.node.GNodeBuilder.*

// on startup

GNodeBuilder nodeBuilder = nodeBuilder();
nodeBuilder.settings {
    node {
        client = true
    }
    cluster {
        name = "test"
    }
}

GNode node = nodeBuilder.node()

// on shutdown

node.stop().close()
--------------------------------------------------