扣丁学堂Java培训之基于Springboot2.0构建ES的多客户端

2019-04-24 13:35:34 2352浏览

今天扣丁学堂Java培训老师给大家分享一篇关于基于Springboot2.0构建ES的多客户端详解，首先当我们有时候操作es会有一些特殊的需求，例如需要操作的index使用了不同的es服务器、用户名、密码、参数等，这个时候我们需要使用不同的es的客户端进行操作，但是我们又不希望拆分成多个项目进行使用，这个时候我们就需要在我们的配置中自己构建一套ES的多客户端了。

文章目录

pom.xml

ElasticsearchConfig.java

ElasticsearchRestClient.java

最终

pom.xml

首先是我们的pom.xml：

<dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
      <version>2.0.5.RELEASE</version>
    </dependency>
     
    <!--es for transport-->
    <dependency>
      <groupId>org.elasticsearch</groupId>
      <artifactId>elasticsearch</artifactId>
      <version>5.6.11</version>
    </dependency>
 
    <dependency>
      <groupId>org.elasticsearch.client</groupId>
      <artifactId>elasticsearch-rest-client</artifactId>
      <version>5.6.11</version>
    </dependency>
 
    <!--es sniffer-->
    <dependency>
      <groupId>org.elasticsearch.client</groupId>
      <artifactId>elasticsearch-rest-client-sniffer</artifactId>
      <version>5.6.3</version>
      <scope>compile</scope>
    </dependency>
 
    <!--es for rest-high-level-client-->
    <dependency>
      <groupId>org.elasticsearch.client</groupId>
      <artifactId>elasticsearch-rest-high-level-client</artifactId>
      <version>5.6.11</version>
    </dependency>
 
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.4</version>
    </dependency>
 
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.39</version>
    </dependency>
 
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <version>2.9.1</version>
    </dependency>
 
    <!-- SpringBoot 热启动 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
    </dependency>
 
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-pool2</artifactId>
      <version>2.4.2</version>
    </dependency>
 
    <dependency>
      <groupId>org.elasticsearch.client</groupId>
      <artifactId>elasticsearch-rest-client-sniffer</artifactId>
      <version>5.6.0</version>
    </dependency>
 
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.6</version>
    </dependency>
</dependencies>

ElasticsearchConfig.java

然后是我们的配置文件，我这里使用的是application.properties的配置文件，因为我们使用不同的信息，所以这里我就不写了，可以根据需求自行获取。

ElasticsearchRestClient.java

import cnkj.site.config.ElasticsearchConfig;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.sniff.SniffOnFailureListener;
import org.elasticsearch.client.sniff.Sniffer;
import org.elasticsearch.client.sniff.SnifferBuilder;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
 
/*
 * @version 1.0 created by LXW on 2018/11/22 9:43
 */
@Slf4j
@Configuration
public class ElasticsearchClient {
 
  @Bean(name = "HighESClient")
  public RestClient restTomcatClient(ElasticsearchConfig elasticsearchConfig) {
    final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
    credentialsProvider.setCredentials(AuthScope.ANY,
        //es账号密码
        new UsernamePasswordCredentials(elasticsearchConfig.getUsername(), elasticsearchConfig.getPassword()));
    //自动扫描网段
    //监听同网段服务
    //Low Level Client init
    RestClientBuilder builder = RestClient.builder(
        new HttpHost(
            elasticsearchConfig.getHost(),
            Integer.valueOf(elasticsearchConfig.getPort()),
            elasticsearchConfig.getSchema()
        )
    ).setHttpClientConfigCallback(
        httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider)
    ).setRequestConfigCallback(new RestClientBuilder.RequestConfigCallback() {
          @Override
          public RequestConfig.Builder customizeRequestConfig(RequestConfig.Builder builder) {
            builder.setConnectTimeout(elasticsearchConfig.getConnectTimeout());
            builder.setSocketTimeout(elasticsearchConfig.getSocketTimeout());
            return builder;
          }
        })
        .setMaxRetryTimeoutMillis(elasticsearchConfig.getMaxRetryTimeoutMillis());
    builder.setMaxRetryTimeoutMillis(elasticsearchConfig.getMaxRetryTimeoutMillis());
    SniffOnFailureListener sniffOnFailureListener = new SniffOnFailureListener();
    builder.setFailureListener(sniffOnFailureListener);
    RestClient lowLevelRestClient = builder.build();
    SnifferBuilder snifferBuilder = Sniffer.builder(lowLevelRestClient).setSniffIntervalMillis(elasticsearchConfig.getSnifferinterval());
    if (elasticsearchConfig.getFailuredelay() > 0) {
      snifferBuilder.setSniffAfterFailureDelayMillis(elasticsearchConfig.getFailuredelay());
    }
    sniffOnFailureListener.setSniffer(snifferBuilder.build());
    return lowLevelRestClient;
  }
  @Bean(name = "HighLevelESClient")
  public RestHighLevelClient restHighLevelClient(@Qualifier("HighESClient") RestClient restClient) {
    return new RestHighLevelClient(restClient);
  }
 
}

最终，在需要使用的地方直接通过注入的方式使用不同的客户端

@Resource(name = "HighLevelESClient")
private RestHighLevelClient client;

以上关于扣丁学堂Java培训之基于Springboot2.0构建ES的多客户端的全部内容，希望对大家的学习有所帮助，最后想要了解更多关于Java开发方面内容的小伙伴，请关注扣丁学堂Java培训官网、微信等平台，扣丁学堂IT职业在线学习教育有专业的Java讲师为您指导，此外扣丁学堂老师精心推出的Java视频教程定能让你快速掌握Java从入门到精通开发实战技能。扣丁学堂Java技术交流群：850353792。

                          

 【关注微信公众号获取更多学习资料】         【扫码进入HTML5进阶免费公开课】

查看更多关于“Java开发资讯”的相关文章>>