Elasticsearch - Migrating from Java High Level Rest Client to New Java API Client of Version 8.x

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1

I am using the new version 8.13 of Elasticsearch for a new search app and trying to imitate the below kind of logic using the new Java API client instead of using Java High Level Rest client which was deprecated now. I have to perform search from multiple indices including below queries-

1.multiple matchPhrasePrefixQuery like below

BoolQueryBuilder searchTheseFields = QueryBuilders.boolQuery();
for (String searchFields : searchTheseFieldsArray) {
        searchTheseFields .should(QueryBuilders.matchPhrasePrefixQuery(searchFields, **SearchText**));
            }

2.multiple term queries with fileds and values

BoolQueryBuilder filterFields = QueryBuilders.boolQuery();
for (Map.Entry<String, Object> entry : filterTheseFields.entrySet()) {
                filterFields.must(QueryBuilders.termQuery(entry.getKey(), entry.getValue()));
            }
  1. multiple range queries
BoolQueryBuilder rangeFilter1 = QueryBuilders.boolQuery();
BoolQueryBuilder rangeFilter2 = QueryBuilders.boolQuery();

rangeFilter1.should(QueryBuilders.rangeQuery(key).gte("gteVal").lte("lteVal"))
                               .should(QueryBuilders.boolQuery().mustNot(QueryBuilders.existsQuery(key)));

And finally add all these queries to a single Query Builder like below and call using client.

BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery()
                .must(searchTheseFields)
                .must(filterFields)
                .filter(rangeFilter1);

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(queryBuilder);
        searchSourceBuilder.from(data.getFrom());
        searchSourceBuilder.size(data.getSize());
        
SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices(passing indices here);
        searchRequest.source(searchSourceBuilder);
        
SearchResponse response = client.search(searchRequest);
2

Hello, sorry I'm not getting the question, are you having problems translating any of these queries?

3

I did it, initially I was facing some issues as I was not able to find some classes which was there earlier but now it's working fine. I have posted the converted code in SO - Elasticsearch - Migrating from Java High Level Rest Client to New Java API Client of Version 8.x - Stack Overflow

Thanks