java連接ElasticSearch集群操作

更新時間：2020年09月17日 14:34:25 作者：java界的守門員

這篇文章主要介紹了java連接ElasticSearch集群操作，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧

我就廢話不多說了，大家還是直接看代碼吧~

/*
 *es配置類
 *
 */
 
@Configuration
public class ElasticSearchDataSourceConfigurer {
 
  private static final Logger LOG = LogManager.getLogger(ElasticSearchDataSourceConfigurer.class);
  @Bean
  public TransportClient getESClient() {
    //設(shè)置集群名稱
    Settings settings = Settings.builder().put("cluster.name", "bigData-cluster").put("client.transport.sniff", true).build();
    //創(chuàng)建client
    TransportClient client = null;
    try {
      client = new PreBuiltTransportClient(settings)
          .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(""), 9300));//集群ip
      LOG.info("ESClient連接建立成功");
    } catch (UnknownHostException e) {
      LOG.info("ESClient連接建立失敗");
      e.printStackTrace();
    }
    return client;
  } 
}

/**
 * Simple to Introduction
 *
 * @Description: [添加類]
 */
@Repository
public class UserDaoImpl implements userDao {
 
	private static final String INDEXNAME = "user";//小寫
	private static final String TYPENAME = "info";
 
	@Resource
	TransportClient transportClient;
 
	@Override
	public int addUser(User[] user) {
		IndexResponse indexResponse = null;
		int successNum = 0;
		for (int i = 0; i < user.length; i++) {
			UUID uuid = UUID.randomUUID();
			String str = uuid.toString();
			String jsonValue = null;
			try {
				jsonValue = JsonUtil.object2JsonString(user[i]);
				if (jsonValue != null) {
					indexResponse = transportClient.prepareIndex(INDEXNAME, TYPENAME, str).setSource(jsonValue)
							.execute().actionGet();
					successNum++;
				}
			} catch (JsonProcessingException e) {
				e.printStackTrace();
			}
 
		}
		return successNum;
	} 
}

 
/**
 *批量插入
 */
public static void bathAddUser(TransportClient client, List<User> users) {
 
		BulkRequestBuilder bulkRequest = transportClient.prepareBulk();
		for (int i = 0; i < users.size(); i++) {
			UUID uuid = UUID.randomUUID();
			String str = uuid.toString();
 
			String jsonValue = null;
			try {
				jsonValue = JsonUtil.object2JsonString(users.get(i));
			} catch (JsonProcessingException e) {
				e.printStackTrace();
			}
			bulkRequest.add(client.prepareIndex("user", "info", str).setSource(jsonValue));
			// 一萬條插入一次
			if (i % 10000 == 0) {
				bulkRequest.execute().actionGet();
			}
			System.out.println("已經(jīng)插入第" + i + "多少條");
		}
 
	}

補充知識：使用java創(chuàng)建ES(ElasticSearch)連接池

1.首先要有一個創(chuàng)建連接的工廠類

package com.aly.util; 
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.PooledObjectFactory;
import org.apache.commons.pool2.impl.DefaultPooledObject;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
 
/**
 * EliasticSearch連接池工廠對象
 * @author 00000
 *
 */
public class EsClientPoolFactory implements PooledObjectFactory<RestHighLevelClient>{
 
	@Override
	public void activateObject(PooledObject<RestHighLevelClient> arg0) throws Exception {
		System.out.println("activateObject");
		
	}
	
	/**
	 * 銷毀對象
	 */
	@Override
	public void destroyObject(PooledObject<RestHighLevelClient> pooledObject) throws Exception {
		RestHighLevelClient highLevelClient = pooledObject.getObject();
		highLevelClient.close();
	}
	
	/**
	 * 生產(chǎn)對象
	 */
//	@SuppressWarnings({ "resource" })
	@Override
	public PooledObject<RestHighLevelClient> makeObject() throws Exception {
//		Settings settings = Settings.builder().put("cluster.name","elasticsearch").build();
		RestHighLevelClient client = null;
		try {
			/*client = new PreBuiltTransportClient(settings)
          .addTransportAddress(new TransportAddress(InetAddress.getByName("localhost"),9300));*/
			client = new RestHighLevelClient(RestClient.builder(
					new HttpHost("192.168.1.121", 9200, "http"), new HttpHost("192.168.1.122", 9200, "http"),
					new HttpHost("192.168.1.123", 9200, "http"), new HttpHost("192.168.1.125", 9200, "http"),
					new HttpHost("192.168.1.126", 9200, "http"), new HttpHost("192.168.1.127", 9200, "http")));
 
		} catch (Exception e) {
			e.printStackTrace();
		}
		return new DefaultPooledObject<RestHighLevelClient>(client);
	}
 
	@Override
	public void passivateObject(PooledObject<RestHighLevelClient> arg0) throws Exception {
		System.out.println("passivateObject");
	}
 
	@Override
	public boolean validateObject(PooledObject<RestHighLevelClient> arg0) {
		return true;
	}	
}

2.然后再寫我們的連接池工具類

package com.aly.util; 
import org.apache.commons.pool2.impl.GenericObjectPool;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.elasticsearch.client.RestHighLevelClient;
 
/**
 * ElasticSearch 連接池工具類
 * 
 * @author 00000
 *
 */
public class ElasticSearchPoolUtil {
	// 對象池配置類，不寫也可以，采用默認(rèn)配置
	private static GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
	// 采用默認(rèn)配置maxTotal是8，池中有8個client
	static {
		poolConfig.setMaxTotal(8);
	}
	// 要池化的對象的工廠類，這個是我們要實現(xiàn)的類
	private static EsClientPoolFactory esClientPoolFactory = new EsClientPoolFactory();
	// 利用對象工廠類和配置類生成對象池
	private static GenericObjectPool<RestHighLevelClient> clientPool = new GenericObjectPool<>(esClientPoolFactory,
			poolConfig);
 
	/**
	 * 獲得對象
	 * 
	 * @return
	 * @throws Exception
	 */
	public static RestHighLevelClient getClient() throws Exception {
		// 從池中取一個對象
		RestHighLevelClient client = clientPool.borrowObject();
		return client;
	}
 
	/**
	 * 歸還對象
	 * 
	 * @param client
	 */
	public static void returnClient(RestHighLevelClient client) {
		// 使用完畢之后，歸還對象
		clientPool.returnObject(client);
	}
}

以上這篇java連接ElasticSearch集群操作就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持腳本之家。

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