ES中删除指定记录的某个字段(field)

ES中删除指定记录中的一个字段

需求描述

1. 项目中的所有客户信息都保存在ES中，由于以前的接口调用链太深，修改起来，你懂的，所以决定重新写一个删除字段的方法
2. 方法尽量通用

实现

1. 依赖

          
            dx.commons
            dx-commons-elasticsearch
            1.0.0
        
        
            org.elasticsearch
            elasticsearch
            5.6.3
        
        
            org.elasticsearch.client
            transport
            5.6.3
        
        
            org.elasticsearch.client
            elasticsearch-rest-high-level-client
            5.6.3
        ```


2. JSON

{
"took": 2,
"timed_out": false,
"_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
},
"hits": {
    "total": 1,
    "max_score": 1,
    "hits": [
        {
            "_index": "asst_customers_v1",
            "_type": "default",
            "_id": "1000212",
            "_score": 1,
            "_source": {
                "createTime": 1513059302000,
                "updateTime": 1513058943000,
                "customerGroupId": 6,
                "crmCustomerId": ccc,
                "sourcePlatform": "schoki",
                "custGroupId": -6,
                "followWechatOfficialAccountFlag": true
            }
        }
    ]
}

} ```

2. 实现类

        package com.dx.asst.customer.service;
        import java.io.IOException;
        import org.apache.http.util.Asserts;
        import org.elasticsearch.action.update.UpdateRequest;
        import org.elasticsearch.client.RestHighLevelClient;
        import org.elasticsearch.script.Script;
        import org.springframework.beans.factory.annotation.Autowired;
        import org.springframework.stereotype.Service;
        import com.dx.asst.comm.constants.EsIndexConstants;
        import lombok.extern.slf4j.Slf4j;
        /**
        * @description :
        * @author : zhubing.ji
        * @date : 2018/6/14 下午4:44
        */
        @Slf4j
        @Service
        public class CustomerOperationEsServiceTest {
        private static final String DEFAULT_TYPE = "default";
        @Autowired
        private RestHighLevelClient restHighLevelClient;
        //说明，这个remove里面如果没有单引号的话，会报错
        private final String updateCustomerScript = "ctx._source.remove('%s')";

         /**
            * 
            * @param customerId 客户记录中的ID
            * @param keys 要删除的字段集合
            */
        
        public void deleteByAttrs(Long customerId, Iterable keys) {
            Asserts.notNull(customerId, "customerId is null");
            Asserts.notNull(keys, "keys is null");

        UpdateRequest updateRequest = new UpdateRequest(EsIndexConstants.CUSTOMER, "default", customerId.toString());
            
            keys.forEach(key -> {
                String updateScript = String.format(updateCustomerScript, key);
                updateRequest.script(new Script(updateScript));
                try {
                    restHighLevelClient.update(updateRequest);
                } catch (IOException e) {
                    log.error("when delete customer attr error", e);
                    throw new RuntimeException("when releaseBindUser error", e);
                }
            });
        }
        }

4. 说明
   如果想删除JSON中的custGroupId和crmCustomerId，调用方法的参数只要按照以下方式传递就可以了

          List keys = Lists.newArrayListWithCapacity(2); 
          keys.add("bindUser");
          keys.add("crmCustomerId");
          customerClientService.deleteAttrsById(customerId, keys);