本篇文章在Springcloud Alibaba使用Canal将Mysql数据实时同步到Redis保证缓存的一致性-CSDN博客
基础上使用canal将mysql数据实时同步到Elasticsearch。
1. 数据库准备
CREATE DATABASE /*!32312 IF NOT EXISTS*/`shop` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */;
USE `shop`;
/*Table structure for table `sku` */
DROP TABLE IF EXISTS `sku`;
CREATE TABLE `sku` (
`id` VARCHAR(60) NOT NULL COMMENT '商品id',
`name` VARCHAR(200) NOT NULL COMMENT 'SKU名称',
`price` INT NOT NULL DEFAULT '1' COMMENT '价格（分）',
`num` INT DEFAULT '100' COMMENT '库存数量',
`image` VARCHAR(200) DEFAULT NULL COMMENT '商品图片',
`images` VARCHAR(2000) DEFAULT NULL COMMENT '商品图片列表',
`create_time` DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`update_time` DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`spu_id` VARCHAR(60) DEFAULT NULL COMMENT 'SPUID',
`category_id` INT DEFAULT NULL COMMENT '类目ID',
`category_name` VARCHAR(200) DEFAULT NULL COMMENT '类目名称',
`brand_id` INT DEFAULT NULL COMMENT '品牌id',
`brand_name` VARCHAR(100) DEFAULT NULL COMMENT '品牌名称',
`sku_attribute` VARCHAR(200) DEFAULT NULL COMMENT '规格',
`status` INT DEFAULT '1' COMMENT '商品状态 1-正常，2-下架，3-删除',
PRIMARY KEY (`id`),
KEY `cid` (`category_id`),
KEY `status` (`status`),
KEY `updated` (`update_time`)
) ENGINE=INNODB DEFAULT CHARSET=utf8mb3 COMMENT='商品表';
/*Data for the table `sku` */
INSERT INTO `sku`(`id`,`name`,`price`,`num`,`image`,`images`,`create_time`,`update_time`,`spu_id`,`category_id`,`category_name`,`brand_id`,`brand_name`,`sku_attribute`,`status`) VALUES
('1318594982227025922','华为Mate40 Pro 32G',114,1228,'https://sklll.oss-cn-beijing.aliyuncs.com/secby/af1faf56-b10a-4700-9896-3143a2d1c40f.jpg','https://sklll.oss-cn-beijing.aliyuncs.com/secby/a65bfbe4-21b7-42b2-b5cf-47a9730e0a16.jpg,https://sklll.oss-cn-beijing.aliyuncs.com/secby/fa52ef66-7724-4d6e-bece-15eba0f8f903.jpg,https://sklll.oss-cn-beijing.aliyuncs.com/secby/734f0f17-ac73-45d3-a6bf-83e1569ce887.jpg','2020-10-20 16:48:37','2023-12-29 19:02:16','1318594982147334146',11159,'软件研发',11,'华为','{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}',1),
('1318596430360813570','华为Mate40 Pro 32G 1800万像素',112,1227,'https://sklll.oss-cn-beijing.aliyuncs.com/secby/9247d041-e940-426c-8e50-06084b631063.jpg','https://sklll.oss-cn-beijing.aliyuncs.com/secby/5f5b7435-6cf2-4797-8f65-d4abff181390.jpg','2020-10-20 16:54:22','2023-12-29 19:07:47','1318596430293704706',11159,'软件研发',11,'华为','{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}',1),
('1318596430398562305','华为Mate40 Pro 128G',111,1226,'https://sklll.oss-cn-beijing.aliyuncs.com/secby/900a3618-9884-4778-bad9-c6c31eaf3eab.jpg','https://sklll.oss-cn-beijing.aliyuncs.com/secby/5f5b7435-6cf2-4797-8f65-d4abff181390.jpg','2020-10-20 16:54:22','2023-12-29 19:11:28','1318596430293704706',11159,'软件研发',11,'华为','{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}',1),
('1318599511605563394','格力手机 5G手机',100,1225,'https://sklll.oss-cn-beijing.aliyuncs.com/secby/2b233c6a-5acc-449e-ba3a-70a506100948.jpg','https://sklll.oss-cn-beijing.aliyuncs.com/secby/ffc66a17-edfc-43bb-8f66-431b1e9bf606.jpg','2020-10-20 17:06:37','2023-12-29 19:11:25','1318599511492317185',11159,'软件研发',11,'华为','{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}',1),
('1318599511647506433','格力手机 5G手机 红色',789,1224,'https://sklll.oss-cn-beijing.aliyuncs.com/secby/1c1fbfea-af9f-49e7-b89b-35e751874399.jpg','https://sklll.oss-cn-beijing.aliyuncs.com/secby/ffc66a17-edfc-43bb-8f66-431b1e9bf606.jpg','2020-10-20 17:06:37','2020-10-20 17:06:37','1318599511492317185',11159,'软件研发',11,'华为','{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}',1),
2. 公共部分
公共包
实体类Sku
@Column注解
用来标识实体类中属性与数据表中字段的对应关系
name 定义了被标注字段在数据库表中所对应字段的名称；由于驼峰命名法，如果不使用@Column字段，canal在监控数据变化时，获得的实体类部分字段为null，比如create_time等等。
@TableName(value ="sku")
@Data
@Table
public class Sku implements Serializable {
@TableId(type = IdType.ASSIGN_ID)
private String id;
private String name;
private Integer price;
private Integer num;
private String image;
private String images;
@Column(name = "create_time")
private Date createTime;
@Column(name = "update_time")
private Date updateTime;
@Column(name = "spu_id")
private String spuId;
@Column(name = "category_id")
private Integer categoryId;
@Column(name = "category_name")
private String categoryName;
@Column(name = "brand_id")
private Integer brandId;
@Column(name = "brand_name")
private String brandName;
@Column(name = "sku_attribute")
private String skuAttribute;
private Integer status;
private static final long serialVersionUID = 1L;
}
实体类SkuEs
@Data
@Document(indexName = "skusearch")//indexName一定全小写，不然出错
public class SkuEs {
@Id
private String id;
@Field(type = FieldType.Text,analyzer = "ik_smart",searchAnalyzer = "ik_smart")
private String name;
private Integer price;
private Integer num;
private String image;
private String images;
private Date createTime;
private Date updateTime;
private String spuId;
private Integer categoryId;
//Keyword：不分词
@Field(type= FieldType.Keyword)
private String categoryName;
private Integer brandId;
@Field(type=FieldType.Keyword)
private String brandName;
@Field(type=FieldType.Keyword)
private String skuAttribute;
private Integer status;
}
3. mall-search-service
导入依赖：
这里使用的springboot版本为2.7.12，springboot和spring-boot-starter-data-elasticsearch的版本问题会导致异常：
java.lang.NoSuchFieldError: INDEX_CONTENT_TYPE
bootstrap.yaml代码如下：
server:
port: 8084
spring:
application:
name: mall-search
cloud:
nacos:
config:
file-extension: yaml
server-addr: localhost:8848
discovery:
#Nacos的注册地址
server-addr: localhost:8848
#Elasticsearch服务配置 6.8.12
elasticsearch:
uris: http://localhost:9200
编写SkuSearchMapper,在主启动类上添加@EnableElasticsearchRepositories(basePackages = {"xx"})，basePackages指定mapper包路径
public interface SkuSearchMapper extends ElasticsearchRepository
}
Service层
public interface SkuSearchService {
void add(SkuEs skuEs);
void del(String id);
}
@Service
public class SkuSearchServiceImpl implements SkuSearchService {
@Autowired
SkuSearchMapper skuSearchMapper;
@Autowired
ElasticsearchRestTemplate elasticsearchRestTemplate;
@Override
public void add(SkuEs skuEs) {
skuSearchMapper.save(skuEs);
}
@Override
public void del(String id) {
skuSearchMapper.deleteById(id);
}
}
controller层
@RestController
@RequestMapping(value = "/search")
public class SkuSearchController {
@Autowired
private SkuSearchService skuSearchService;
/*****
* 增加索引
*/
@PostMapping(value = "/add")
public RespResult add(@RequestBody SkuEs skuEs){
skuSearchService.add(skuEs);
return RespResult.ok();
}
/***
* 删除索引
*/
@DeleteMapping(value = "/del/{id}")
public RespResult del(@PathVariable(value = "id")String id){
skuSearchService.del(id);
return RespResult.ok();
}
}
4. mall-canal-service
基于上一篇文章Springcloud Alibaba使用Canal将Mysql数据实时同步到Redis保证缓存的一致性-CSDN博客的canal服务。
添加以下代码：
feign接口
@FeignClient(value = "mall-search")
public interface SkuSearchFeign {
@PostMapping(value = "/search/add")
RespResult add(@RequestBody SkuEs skuEs);
/***
* 删除索引
*/
@DeleteMapping(value = "/search/del/{id}")
RespResult del(@PathVariable(value = "id")String id);
}
canal设计代码如下：
@Component
@CanalTable(value = "sku")
public class SkuSearchHandler implements EntryHandler
@Autowired
SkuSearchFeign skuSearchFeign;
@Override
public void insert(Sku sku) {
System.out.println(sku);
String jsonString = JSON.toJSONString(sku);
SkuEs skuEs = JSON.parseObject(jsonString, SkuEs.class);
skuSearchFeign.add(skuEs);
}
@Override
public void update(Sku before, Sku after) {
System.out.println(after);
String jsonString = JSON.toJSONString(after);
SkuEs skuEs = JSON.parseObject(jsonString, SkuEs.class);
System.out.println(skuEs);
skuSearchFeign.add(skuEs);
}
@Override
public void delete(Sku sku) {
System.out.println(sku);
skuSearchFeign.del(sku.getId());
}
}
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