es去重 获取重复数据后保留最小值ID后进行批量删除

使用脚本进行去重

获取重复数据后保留最小值ID后进行批量删除

代码如下：

controller:

     /**
     * 更新并删除重复数据
     */
    @Async
    @GetMapping("/up")
    @ApiOperation(value = "更新并删除重复数据", notes = "更新并删除重复数据")
    public void up(Integer size) {
        
        size = size == null || size <= 0 ? 1000 : size;
        boolean state = true;
        long num = 0;

        do {
            BoolQueryBuilder builder = QueryBuilders.boolQuery();
            NativeSearchQuery query = new NativeSearchQuery(builder);
            query.addAggregation(AggregationBuilders.terms("mail").field("terms").field("mail.keyword").size(size).minDocCount(2));

            SearchHits<EsDto> searchHits = elasticsearchRestTemplate.search(query, EsDto.class);
            Terms aggs = searchHits.getAggregations().get("mail");

            if (aggs.getBuckets().size() == 0) {
                state = false;
            }

            for (Terms.Bucket entry : aggs.getBuckets()) {
                if (entry.getDocCount() == 1) {
                    state = false;
                    break;
                }

                String mail = (String) entry.getKey();
                log.info(" syncUp mail : {} - mailCount：{}", mail, entry.getDocCount());

                NativeSearchQuery queryMail = this.getQuery(0, size, mail);
                SearchHits<EsDto> mails = elasticsearchRestTemplate.search(queryMail, EsDto.class);
                if (mails.getTotalHits() <= 1) {
                    state = false;
                    break;
                }
                List<EsDto> collect = mails.get().map(e -> e.getContent()).collect(Collectors.toList());

                Collection<Integer> ids = collect.stream().skip(1).map(EsDto::getId).collect(Collectors.toSet());
                if (ids.size() == 0) {
                    continue;
                }
                num += ids.size();
                int synchroId = collect.get(0).getId();
                esManager.synchronizationUpByBach(ids, synchroId);
            }
        } while (state);
        
        log.info(" syncUp mail end num: {}  ", num);
    }
    
    
    private NativeSearchQuery getQuery(int page, int pageSize, String mail) {
        BoolQueryBuilder builder = QueryBuilders.boolQuery();
        EsQueryUtil.setMatchPhraseQueryValue("mail.keyword", mail, builder);
        
        NativeSearchQuery query = new NativeSearchQuery(builder);
        List<Sort.Order> list = new ArrayList<>();
        list.add(new Sort.Order(Sort.Direction.ASC, "id"));
        Pageable pageable = PageRequest.of(page, pageSize, Sort.by(list));
        query.setPageable(pageable);
        query.setTrackTotalHits(true);
        
        return query;
    }    

manager：

　　@Async
    public void synchronizationUpByBach(Collection<Integer> ids, int newId) {
        if (ids.size() == 0 || newId == 0) {
            return;
        }
        List<Es> entities = new ArrayList<>();
        for (Integer id : ids) {
            Es es = new Es();
            es.setId(id);
            entities.add(es);
        }
        log.info(" synchronizationUp success old:{} - new:{} ", StringUtils.join(ids,","), newId);
        deleteAll(entities);
    }

　　public void deleteAll(List<Es> entities) {
        try {
            iEsDao.deleteAll(entities);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        
    }

domain：

# indexName 为es索引
@Document(indexName = "res")
public class Es {
    @Id
    private int id;
    
    private int status;
    private String name;
    private String mail;
}