ElasticSearch学习之(九)--代码实现ES同步数据

浅浅的花香味﹌ 2023-06-12 04:19 45阅读 0赞

该博文主要是描述如何使用代码同步数据至ES，话不多说直接上干货！

1.首先创建自己的索引，指定mapping（当然直接往ES写入数据会自动生成mapping，但是数据类型不可控），所以需要自己创建mapping指定相应的数据类型。

PUT judge_customer
    {
       "mappings" : {
         
             "properties" : {
                "company_id" : {
                   "type" : "keyword"
                },
                "customer_id" : {
                   "type" : "keyword"
                },
                "customer_level" : {
                   "type" : "keyword"
                },
                "customer_mobile" : {
                   "type" : "keyword"
                },
                "employee_id" : {
                   "type" : "keyword"
                },
                "first_arrive_time" : {
                   "type" : "long"
                },
                "internal_id" : {
                   "type" : "keyword"
                },
                "last_arrive_time" : {
                   "type" : "long"
                },
                "recommend_id" : {
                   "type" : "keyword"
                },
                "release_num" : {
                   "type" : "integer"
                }
             }
       },
       "settings" : {
          "index" : {
             "number_of_replicas" : "1",
             "number_of_shards" : "1"
          }
       }
    }

我是用kibana执行的

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70][]

使用ES的header插件查看索引已经创建成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70 1][]

2.上面是ES的准备工作下面直接上代码

@Autowired
        private RestHighLevelClient esClient;
    
        /**
         * 更新索引接口（批量）
         * @param list
         * @return
         */
        @Override
        public int batchIndex(List<BasicCustomerDoc> list) {
    
            int addCount = 0;
            int delCount = 0;
            log.info("create or update lghszz customer index begin");
            BulkRequest bulkRequest = new BulkRequest();
            // 操作标识
            boolean flag = false;
    
            for (BasicCustomerDoc v : list) {
                if (StringUtils.isBlank(v.getCustomerId()) && StringUtils.isBlank(v.getInternalId())) {
                    log.error("lghszz customer id is null!");
                    continue;
                }
    
                // 封装ES数据 通过对v实体的字段进行非空判断封装到对应索引字段中(map的key)
                Map<String, Object> data = getSourceMap(v);
                // 创建索引
                StringBuilder idBuilder = new StringBuilder().append(v.getCustomerId()).append("_").append(v.getInternalId());
                IndexRequest indexRequest = new IndexRequest(IndexName.JUDGE_CUSTOMER.value()).id(idBuilder.toString());
                indexRequest.source(data, XContentType.JSON);
                bulkRequest.add(indexRequest);
    			flag = true;
                addCount++;
    
    //          // 更新索引
    //          UpdateRequest updateRequest = new UpdateRequest(IndexName.JUDGE_CUSTOMER.value(), idBuilder.toString());
    //          updateRequest.doc(data, XContentType.JSON);
    //          bulkRequest.add(updateRequest);
    
    
    //          // 删除无效数据
    //          DeleteRequest deleteRequest = new DeleteRequest(IndexName.lghszz_CUSTOMER.value(), idBuilder.toString());
    //          bulkRequest.add(deleteRequest);
    //          flag = true;
    //          delCount++;
    
            }
    
            // 存在更新或删除操作
            if (flag) {
                BulkResponse response = null;
                try {
    				// 使用ES 的client进行操作获取结果
                    response = esClient.bulk(bulkRequest, RequestOptions.DEFAULT);
                } catch (Exception e) {
                    log.error("error in lghszz customer create index", e);
                }
    
                if (response != null && !response.hasFailures()) {
                    BulkItemResponse[] items = response.getItems();
                    int opSize = items != null ? items.length : 0;
                    if (opSize == addCount + delCount) {
                        log.info("create or update lghszz customer index end！ operational number = {}, add = {}, del = {}", opSize, addCount, delCount);
                    } else {
                        log.error("lghszz customer index operation number inconsistent，operational number = {}, add = {}, del = {}", opSize, addCount, delCount);
                    }
                    return opSize;
                } else {
                    log.error("lghszz customer index operates fail");
                }
            } else {
                log.error("lghszz customer index no operation!");
            }
            return addCount;
        }

这也就是简单实现ES获取数据并写入更新到ES中的简单实现，可以正常执行写入数据。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70 2][]

**如有披露或问题欢迎留言或者入群探讨**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70 3][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70]: /images/20230531/e3108899563b453ca88016801cb6758e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70 1]: /images/20230531/6c962268a6eb4b98b4fba0c46dd8fa62.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70 2]: /images/20230531/cf2cbdde67a74e468d32085252ba05fe.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDcwNzMz_size_16_color_FFFFFF_t_70 3]: /images/20230531/8a1543c2c6ab4d6bab73d9af9ddb2c21.png