spring boot 集成 Elasticsearch

标签：String spring boot springframework data elasticsearch import org Elasticsearch

一、背景

　　最近在做录制回放平台，因为需要把部分数据存储到ES，因此特地实践和调研了一把，把相关材料记录一下；

　　elastcishearch 版本：7.14.2

spring boot版本：2.6.13

spring-boot-starter-data-elasticsearch: 2.6.13

版本参考文档 https://docs.spring.io/spring-data/elasticsearch/docs/5.2.0-M1/reference/html/#elasticsearch.clients

二、参考文档

https://learnku.com/docs/elasticsearch73/7.3

https://docs.kilvn.com/elasticsearch/docs/6.html

https://spring.io/projects/spring-data-elasticsearch/

三、接入步骤

3.1 maven配置

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.4.0</version>
    <relativePath/>
</parent>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</version>
        <scope>compile</scope>
    </dependency>
</dependencies>

3.2 启动配置

因为考虑可能要支持多数据源，所以我没有考虑在配置中使用 spring.data.elasticsearch.repositories.enabled=true 的方式，而是自定义了启动配置类，代码如下

 1 import org.elasticsearch.client.RestHighLevelClient;
 2 import org.springframework.beans.factory.annotation.Qualifier;
 3 import org.springframework.beans.factory.annotation.Value;
 4 import org.springframework.context.annotation.Bean;
 5 import org.springframework.context.annotation.Configuration;
 6 import org.springframework.data.elasticsearch.client.ClientConfiguration;
 7 import org.springframework.data.elasticsearch.client.RestClients;
 8 import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;
 9 import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
10 import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
11 import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
12 
13 
14 @Configuration
15 public class RestClientConfig extends AbstractElasticsearchConfiguration {
16 
17  
18     @Value("${elasticsearch.url}")
19     private String elasticsearchUrl;
20 
21     @Value("${elasticsearch.username}")
22     private String username;
23 
24     @Value("${elasticsearch.password}")
25     private String password;
26 
27     
28     @Bean("esClient")
29     @Override
30     public RestHighLevelClient elasticsearchClient() {
31         final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
32                 .connectedTo(elasticsearchUrl)
33                 .withBasicAuth(username, password)
34                 .build();
35         return RestClients.create(clientConfiguration).rest();
36     }
37 
38     @Override
39     @Bean(name = {"elasticSearchRestTemplate" })
40     public ElasticsearchRestTemplate elasticsearchOperations(ElasticsearchConverter elasticsearchConverter,
41                                                            @Qualifier("esClient") RestHighLevelClient elasticsearchClient) {
42         return new ElasticsearchRestTemplate(elasticsearchClient, elasticsearchConverter);
43     }
44 
45 }

以下配置可以放入到application.properties里面即可

elasticsearch.url=xxxx
elasticsearch.username=xxxx
elasticsearch.password=xxx

3.3 创建索引&定义实体对象

elasticsearch索引的创建，可以手动创建，也可以自动创建；我们可以利用spring-data-elasticsearch的自动创建的能力来构建索引

package com.example.es.entity;

import lombok.Data;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;
import org.springframework.data.elasticsearch.annotations.Setting;

import java.util.Date;

/**
 * @author peng.hu1
 * @Date 2023/7/13 15:06
 */
@Data
@Setting(shards = 3)
@Document(indexName = "record", createIndex = true)
public class RecordEntity {

    /**
     * 主键
     */
    @Id
    private String id;


    @Field(name = "api", type = FieldType.Keyword)
    private String api;


    /**
     * 创建时间
     */
    @Field(value = "create_time")
    private Date createTime;


    /**
     * 应用名
     */
    @Field(value = "app_name", type = FieldType.Keyword)
    private String appName;


    /**
     * 环境信息
     */
    @Field(value = "env", type = FieldType.Keyword)
    private String env;

    /**
     * 机器IP
     */
    @Field(value = "host", type = FieldType.Keyword)
    private String host;

    /**
     * 链路追踪ID
     */
    @Field(value = "trace_id", type = FieldType.Keyword)
    private String traceId;

    /**
     * 主调用
     */
    @Field(value = "entrance_desc", type = FieldType.Keyword)
    private String entranceDesc;

    /**
     * 记录序列化信息
     */
    @Field(value = "wrapper_record", type = FieldType.Keyword, index = false)
    private String wrapperRecord;

    /**
     * 请求参数JSON
     */
    @Field(type = FieldType.Text, index=false)
    private String request;

    /**
     * 返回值JSON
     */
    @Field(type = FieldType.Text, index=false)
    private String response;
}

定义实体的时候，有几个关键注解需要说明一下，
@Document(indexName = "record", createIndex = true) 其中indexName为索引名，createIndex=true表示默认在插入的时候，会创建索引；索引是包含mapping 和 setting 的，mapping的配置是从@Field注解生成的; @Setting注解用于设置分片相关物理属性；

public @interface Field {
　　FieldType type() default FieldType.Auto; //自动检测属性的类型，可以根据实际情况自己设置
　　FieldIndex index() default FieldIndex.analyzed; //默认情况下分词，一般默认分词就好，除非这个字段你确定查询时不会用到
　　DateFormat format() default DateFormat.none; //时间类型的格式化
　　String pattern() default ""; 
　　boolean store() default false; //默认情况下不存储原文
　　String searchAnalyzer() default ""; //指定字段搜索时使用的分词器
　　String indexAnalyzer() default ""; //指定字段建立索引时指定的分词器
　　String[] ignoreFields() default {}; //如果某个字段需要被忽略
　　boolean includeInParent() default false;
}

FieldType.Keyword 跟 FieldType.Text 都可以运用到字符串，最大的区别在于Text是会分词建立倒排索引的，这个按需选择类型就好；如果只是当做db来用，默认强制设置成keyWord类型更合适；

3.4 对索引对象的增删改查

定义接口

package com.example.es.service;

import com.example.es.entity.RecordEntity;
import com.example.es.model.Page;
import com.example.es.model.Search;

import java.util.List;

/**
 * @author peng.hu1
 * @Date 2023/8/17 16:22
 */
public interface RecordEntityService {

    public void save(RecordEntity entity);

    public void batchSave(List<RecordEntity> entityList);

    public Page<RecordEntity> search(Search search);

    public void remove(RecordEntity entity);
}

接口实现

package com.example.es.impl;

import com.example.es.entity.RecordEntity;
import com.example.es.model.Page;
import com.example.es.model.Search;
import com.example.es.service.RecordEntityService;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
import org.springframework.data.elasticsearch.core.SearchHit;
import org.springframework.data.elasticsearch.core.SearchHits;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author peng.hu1
 * @Date 2023/8/17 16:25
 */
@Component
public class RecordEntityServiceImpl implements RecordEntityService {

    @Resource(name = "elasticSearchRestTemplate")
    ElasticsearchRestTemplate elasticsearchRestTemplate;

    @Override
    public void save(RecordEntity entity) {
        elasticsearchRestTemplate.save(entity);
    }

    @Override
    public void batchSave(List<RecordEntity> entityList) {
        elasticsearchRestTemplate.save(entityList);
    }

    @Override
    public Page<RecordEntity> search(Search r) {
        NativeSearchQueryBuilder query = new NativeSearchQueryBuilder();
        BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery();

        query.withQuery(queryBuilder);

        if(StringUtils.hasLength(r.getAppName())) {
            queryBuilder.filter(QueryBuilders.matchPhraseQuery("app_name", r.getAppName()));
        }

        if(StringUtils.hasLength(r.getEnv())) {
            queryBuilder.filter(QueryBuilders.matchPhraseQuery("env", r.getEnv()));
        }

        //分页 & 排序
        PageRequest pageRequest = PageRequest.of(r.getPage()-1, r.getPageSize());
        query.withQuery(queryBuilder);
        query.withPageable(pageRequest);
        query.withSorts(SortBuilders.fieldSort("create_time").order(SortOrder.DESC));

        SearchHits<RecordEntity> searchHits = elasticsearchRestTemplate.search(query.build(), RecordEntity.class);


        Page<RecordEntity> res = new Page<>();
        res.setPage(r.getPage());
        res.setPageSize(r.getPageSize());
        res.setTotal(searchHits.getTotalHits());
        res.setData(searchHits.stream().map(SearchHit::getContent).collect(Collectors.toList()));

        return res;
    }

    @Override
    public void remove(RecordEntity entity) {
        elasticsearchRestTemplate.delete(entity);
    }
}

至此接入流程就全部结束了

标签：String,spring,boot,springframework,data,elasticsearch,import,org,Elasticsearch
From： https://www.cnblogs.com/viogs/p/17637422.html