Simple Elasticsearch usage

gistfile1.java

package org.wkh.learningelasticsearch;

import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.node.Node;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;

import java.util.Date;

import static org.elasticsearch.node.NodeBuilder.*;
import static org.elasticsearch.common.xcontent.XContentFactory.*;

public class LearningElasticSearch {
    public static void main(String[] args) throws Exception {
        Node node = nodeBuilder().node();
        Client client = node.client();

        IndexResponse response = client.prepareIndex("twitter", "tweet")
                .setSource(jsonBuilder()
                                .startObject()
                                .field("user", "kimchy")
                                .field("postDate", new Date())
                                .field("message", "warren loves Rosalind")
                                .endObject()
                )
                .execute()
                .actionGet();

        System.out.println(response.isCreated());

        SearchResponse searchResponse = client
                .prepareSearch("twitter")
                .setQuery(QueryBuilders.matchQuery("message", "Rosalind"))
                .execute()
                .actionGet();

        SearchHits hits = searchResponse.getHits();

        System.out.println(hits.totalHits());
        for(SearchHit hit : hits.getHits()) {
            System.out.println("hit: " + hit.getSource().get("message"));
        }

        node.close();
    }
}

https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/query-dsl-queries.html
https://www.elastic.co/guide/en/elasticsearch/reference/current/search.html