Elasticsearch 8.8 dynamic search request query

Elastic Stack Elasticsearch
1 
SearchResponse<ObjectNode> searchResponse = elasticsearchClient.search(req -> req.index(index)
                                    .from((pageNumber - 1) * pageSize)
                                    .size(pageSize)
                                    .source(SourceConfig.of(s -> s.filter(f -> f.includes(queryDto.getQuery().getSelect()))))
                                    .query(subQuery -> subQuery.bool(bool -> bool
                                            .must(termsQueryMustList)
                                            .mustNot(termsQueryMustNotList)))
                                    .sort(sortOptions),        
                                    ObjectNode.class);

How can I build the search request query dynamically by adding .sort() or .from() or .size() only if sortOptions and pageSize are available.

2

The builder lambda functions don't have to be simple expressions and can contain arbitrary logic. The code below should be what you're looking for:

SearchResponse<ObjectNode> searchResponse = elasticsearchClient.search(req -> {
    req.index(index)
        .source(SourceConfig.of(s -> s
            .filter(f -> f
                .includes(queryDto.getQuery().getSelect())
            )
        ))
        .query(subQuery -> subQuery.bool(bool -> bool
            .must(termsQueryMustList)
            .mustNot(termsQueryMustNotList))
        );
    
        if (pageSize > 0) {
            req.from((pageNumber - 1) * pageSize).size(pageSize);
        }
        if (sortOptions != null) {
            req.sort(sortOptions);
        }
        return req;
    },
    ObjectNode.class
);
3

Thank you very much @swallez for your answer. Really appreciate your support.