Matt Weber

SolrJ TermsComponent Support

Posted 10 months, 1 week ago at 9:03 pm. 2 comments

I was working on implementing an auto-complete search box today using Solr 1.4 and the new TermsComponent. TermsComponent is a simple plugin that provides access to Lucene’s term dictionary and is very fast. Being fast and the fact it can hook into a search index makes it perfect for an auto-completion server.

Unfortunately, SolrJ does not support this new functionality yet. Well not officially because you could always parse the raw response object yourself. That is exactly what I was doing until I figured I might as well just add the support to SolrJ. I did, and it was extremely easy.

I added support for TermsComponent parameters and implemented a new TermsComponent response type. The TermsComponent response is parsed into a list of Type objects. The Type object has two methods, getTerm() and getFrequency(). getTerm() returns the suggested term, and getFrequency() returns the frequency of the term appearing in the index.

I have submitted my patch upstream for inclusion into a future version of SolrJ.

Here is the link to the JIRA bug report:
https://issues.apache.org/jira/browse/SOLR-1139

Here is the patch:
https://issues.apache.org/jira/secure/attachment/12407047/SOLR-1139.patch