Spring data solr - Bean with Highlight

Question

I'm writing a Web Application that communicates with Solr and I am using Spring Data Solr + SolrJ to get the information in Java.

For the Solr query, I am using (e)DisMax with some options (for now, and maybe later I need to add other things):

SolrQuery query = new SolrQuery();
        
query.set("q", terms);
query.set("pf", "text^100");
query.set("qf", "text");
query.set("defType", "edismax");
        
query.setStart(pageable.getOffset());
query.setRows(pageable.getPageSize());
        
query.setHighlight(true).setHighlightSnippets(10);
query.setParam("hl.fl", "text");

For this structure I have build a bean in this way

@SolrDocument
public class Document {
    
    @Field
    private String id;
    
    @Field
    private String text;
    
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }
}

And I am going to execute the query:

response = solrTemplate.getSolrServer().query(query);
List<Document> beans = solrTemplate.convertQueryResponseToBeans(response, Document.class);

After that, in my Document object I find only "id" and "text". Is it possible to annotate the bean to get the Highlight too?

Looking on the net I have found very few examples of using Spring Data Solr + SorlJ.

take a look at this : https://www.programmersought.com/article/382996898/ — elouanesbg, Jan 07 '21 at 20:47

score 1 · Accepted Answer · answered Sep 28 '20 at 07:44

Retrieving the highlights as bean that you defined yourself is not possible with SolrJ. You can however retrieve them as a Map

QueryResponse response = solrTemplate.getSolrServer().query(query);
Map<String, Map<String, List<String>>> highlights = response.getHighlighting();

If you don't use the SolrJ approach, and switch to Spring-Data/Spring-Boot starter then it is possible:

HighlightQuery hq = new SimpleHighlightQuery(new Criteria(... enter search criteria...));
HighlightOptions hlOptions = new HighlightOptions().setNrSnipplets(maxSnippets)
hq.setHighlightOptions(hlOptions);
HighlightPage<SolrNewspaper> highlights = solrTemplate.queryForHighlightPage(mySolrCore, hq, MySolrDocument.class);

Note that the latter is only possible if you return default Solr highlighting information. If you made customizations to highlighting in Solr it probably won't work.

Thanks for your answer, however the project is already dead.. :D — Mistre83, Sep 29 '20 at 14:53

Spring data solr - Bean with Highlight

1 Answers1