Tag: RestHighLevelClient

ElasticSearch: High Level Client Post

This entry is part 2 of 4 in the series ElasticSearch High Level Rest Client

In this tutorial I will show you how to perform a POST request. If you have not connected first please do so before continuing.

Imports

  1. import org.apache.http.HttpEntity;
  2. import org.apache.http.nio.entity.NStringEntity;
  3. import org.apache.http.entity.ContentType;
  4. import org.apache.http.util.EntityUtils;
  5. import org.elasticsearch.client.Response;

Now we can perform the POST to ElasticSearch.

  1. final Integer id = 1;
  2. final String document = "{\"key\": 1 }";
  3. final HttpEntity httpEntity = new NStringEntity(document, ContentType.APPLICATION_JSON);
  4.  
  5. final Response response = restHighLevelClient.getLowLevelClient().performRequest("POST", "/indexName/indexType/" + id, Collections.<String, String>emptyMap(), httpEntity);
  6.  
  7. //Now you can print the response
  8. System.out.println(EntityUtils.toString(response.getEntity()));

ElasticSearch: High Level Rest Client Connection

This entry is part 1 of 4 in the series ElasticSearch High Level Rest Client

In this tutorial I will show you how to use the ElasticSearch high level rest client.

First you will need to add the low level rest to the pom.

  1. <properties>
  2. 	<elasticSearch.version>6.2.4</elasticSearch.version>
  3. </properties>
  4.  
  5. <dependency>
  6.     <groupId>org.elasticsearch.client</groupId>
  7.     <artifactId>elasticsearch-rest-high-level-client</artifactId>
  8.     <version>${elasticSearch.version}</version>
  9. </dependency>

Next you will need to specify the imports.

  1. import java.util.List;
  2. import java.util.ArrayList;
  3. import java.util.Arrays;
  4. import org.apache.http.HttpHost;
  5. import org.elasticsearch.client.RestClient;
  6. import org.elasticsearch.client.RestClientBuilder;
  7. import org.elasticsearch.client.RestHighLevelClient;

Now you can connect to ElasticSearch.

  1. final List hosts = new ArrayList<>(Arrays.asList("localhost"));
  2. final Integer port = 9200;
  3. final String scheme = "http";
  4. 		
  5. final HttpHost[] httpHosts = hosts.stream().map(host -> new HttpHost(host, port, scheme)).toArray(HttpHost[]::new);
  6.  
  7. final RestClientBuilder restClientBuilder = RestClient.builder(httpHosts);
  8. final RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);

Now you can do whatever you need to!