elasticsearch api中的delete操作

官网：https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-delete.html

The delete API allows one to delete a typed JSON document from a specificindex based on its id. The following example deletes the JSON documentfrom an index called twitter, under a type called tweet, with id valued1:

DeleteResponse response = client.prepareDelete("twitter", "tweet", "1").get();

For more information on the delete operation, check out thedelete API docs.

Operation Threadingedit

The delete API allows to set the threading model the operation will beperformed when the actual execution of the API is performed on the samenode (the API is executed on a shard that is allocated on the sameserver).

The options are to execute the operation on a different thread, or toexecute it on the calling thread (note that the API is still async). Bydefault, operationThreaded is set to true which means the operationis executed on a different thread. Here is an example that sets it tofalse:

DeleteResponse response = client.prepareDelete("twitter", "tweet", "1").setOperationThreaded(false).get();

demo源码：

package es.documentApi;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

import org.elasticsearch.action.DocWriteResponse.Result;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;

public class ElasticSearchDelete {

public static void main(String[] args) {
       try {
           // 设置集群名称
           Settings settings = Settings.builder().put("cluster.name", "my-elasticsearch")
                   .put("client.transport.sniff", true).build();
           // 创建client
           TransportClient client = new PreBuiltTransportClient(settings)
                   .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("192.168.224.140"), 9300))
                   .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("192.168.224.141"), 9300))
                   .addTransportAddress(
                           new InetSocketTransportAddress(InetAddress.getByName("192.168.224.142"), 9300));
           DeleteResponse response = client.prepareDelete("blog", "article", "AVvYUN6QAl9waYY55JSH").get();
           /*DeleteResponse response1 = client.prepareDelete("blog", "article", "1")
                    .setOperationThreaded(false)
                    .get();*/

           Result res = response.getResult();
           System.out.print(res);
           client.close();
       } catch (UnknownHostException e) {
           e.printStackTrace();
       } catch (IOException e) {
           e.printStackTrace();
       }

}

最后结果：

no modules loaded
loaded plugin [org.elasticsearch.index.reindex.ReindexPlugin]
loaded plugin [org.elasticsearch.percolator.PercolatorPlugin]
loaded plugin [org.elasticsearch.script.mustache.MustachePlugin]
loaded plugin [org.elasticsearch.transport.Netty3Plugin]
loaded plugin [org.elasticsearch.transport.Netty4Plugin]
DELETED

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Operation Threadingedit

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