Term frequency in solrj - solrj

Question

I using SOLRJ to find term frequency for each term in a field, I wrote this code but it is not working:
public static SolrRequest req;
public static void main(String[] args) throws SolrServerException,
IOException {
String urlString = "http://localhost:8983/solr/huda";
SolrClient solr = new HttpSolrClient.Builder(urlString).build();
SolrQuery query = new SolrQuery();
query.setQuery("*:*");
SolrRequest<QueryResponse> req = new QueryRequest(query);
QueryResponse rsp = req.process(solr);
System.out.println("numFound: " + rsp.getResults().getNumFound());
TermsResponse termResp =rsp.getTermsResponse();
List<Term> terms = termResp.getTerms("name");
System.out.print(terms.size());
}
I got this :
Exception in thread "main" java.lang.NullPointerException at solr_test.solr.App2.main(App2.java:50)
Thanks!

Answer 1

You should change a bit your code in order to get the terms statistics in your solr query response.
Try out something like this:
SolrQuery query = new SolrQuery();
query.setTerms(true);
query.addTermsField("name");
SolrRequest<QueryResponse> req = new QueryRequest(query);
QueryResponse rsp = req.process(solr);
TermsResponse termResp = rsp.getTermsResponse();
List<TermsResponse.Term> terms = termResp.getTerms("name");
NOTE that the setQuery method is not used in the provided code. Internally, because of this, the solr request will be directed to the Terms handler and not to the Query handler.
Solr Terms Component