spring boot 集成 elasticsearch 5.x

目錄

項目環境：

• jdk 1.8
• spring boot 1.5.1

由於spring boot 目前SpringBoot 1.5.1.RELEASE和Spring Data Elasticsearch 2.10.RELEASE僅支持ElasticSearch 2.4.0。 
他們不支持最新版本的ElasticSearch 5.x版本。

Spring Boot Version (x)	Spring Data Elasticsearch Version (y)	Elasticsearch Version (z)
x <= 1.3.5	y <= 1.3.4	z <= 1.7.2*
x >= 1.4.x	2.0.0 <=y < 5.0.0**	2.0.0 <= z < 5.0.0**

mavan 配置 pom.xml

   <!-- 版本控制  -->
    <properties>
            <log4j-api.version>2.8.2</log4j-api.version>
            <log4j-core.version>2.8.2</log4j-core.version>
            <elasticsearch.version>5.4.1</elasticsearch.version>
            <transport.version>5.4.1</transport.version>
    </properties>
    <!-- elasticsearch 5.x 依賴 --> 
    <dependencies>
       <dependency>
           <groupId>org.apache.logging.log4j</groupId>
           <artifactId>log4j-api</artifactId>
           <version>${log4j-api.version}</version>
       </dependency>
       <dependency>
           <groupId>org.apache.logging.log4j</groupId>
           <artifactId>log4j-core</artifactId>
           <version>${log4j-core.version}</version>
       </dependency>
       <dependency>
           <groupId>org.elasticsearch</groupId>
           <artifactId>elasticsearch</artifactId>
           <version>${elasticsearch.version}</version>
       </dependency>
       <dependency>
           <groupId>org.elasticsearch.client</groupId>
           <artifactId>transport</artifactId>
           <version>${transport.version}</version>
       </dependency>
   </dependencies> 

: 特注

 ElasticSearch 5.x 根據官網配置maven 依賴, 由於 5.0x的 jar 內部使用的 apache log4日誌。
 所以要配置額外的依賴支持 org.apache.logging.log4j。

application-dev.yml

spring:
     data:
   elasticsearch:
        cluster-name: elasticsearch
        cluster-nodes: 127.0.0.1:9300

配置 java Client連接池

package com.****.****.config;
import com.****.****.common.utils.StringUtils;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import java.net.InetAddress;
import java.net.UnknownHostException;


/**
 *TransportClientFactoryBean
 *
 * @author 
 */
@Configuration
public class ElasticsearchConfiguration implements FactoryBean<TransportClient>, InitializingBean, DisposableBean {
    private static final Logger logger = LoggerFactory.getLogger(ElasticsearchConfiguration.class);
    //由於項目從2.2.4配置的升級到 5.4.1版本 原配置文件不想動還是指定原來配置參數
    @Value("${spring.data.elasticsearch.cluster-nodes}")
    private String clusterNodes ;

    @Value("${spring.data.elasticsearch.cluster-name}")
    private String clusterName;

    private TransportClient client;

    @Override
    public void destroy() throws Exception {
        try {
            logger.info("Closing elasticSearch client");
            if (client != null) {
                client.close();
            }
        } catch (final Exception e) {
            logger.error("Error closing ElasticSearch client: ", e);
        }
    }

    @Override
    public TransportClient getObject() throws Exception {
        return client;
    }

    @Override
    public Class<TransportClient> getObjectType() {
        return TransportClient.class;
    }

    @Override
    public boolean isSingleton() {
        return false;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        buildClient();
    }

    protected void buildClient()  {
        try {
            PreBuiltTransportClient  preBuiltTransportClient = new PreBuiltTransportClient(settings());
            if (!"".equals(clusterNodes)){
                for (String nodes:clusterNodes.split(",")) {
                    String InetSocket [] = nodes.split(":");
                    String  Address = InetSocket[0];
                    Integer  port = Integer.valueOf(InetSocket[1]);
                    preBuiltTransportClient.addTransportAddress(new
                                     InetSocketTransportAddress(InetAddress.getByName(Address),port ));
                }
                client = preBuiltTransportClient;
            }
        } catch (UnknownHostException e) {
            logger.error(e.getMessage());
        }
    }
    /**
     * 初始化默認的client
     */
    private Settings settings(){
        Settings settings = Settings.builder()
            .put("cluster.name",clusterName) 
            .put("client.transport.sniff",true)
            build();
        client = new PreBuiltTransportClient(settings);
        return settings;
    }

}

參考文獻

[1] : https://www.mkyong.com/spring-boot/spring-boot-spring-data-elasticsearch-example/