: > So to understand better:
: >
: > user request -> micro-plugin -> RequestHandler -> ResponseHandler
: or:
:
: HttpServletRequest -> SolrRequestParser -> SolrRequestProcessor ->
: SolrResponse -> SolrResponseWriter
specifically what i had in mind was something like this...
class SolrUberServlet extends HttpServlet {
public service(HttpServletRequest req, HttpServletResponse response) {
SolrCore core = getCore();
Solr(Query)Response solrRsp = new Solr(Query)Response();
// servlet specific method which does minimal inspection of
// req to determine the parser name
String p = pickRequestParser(req);
// looks up a registered instance (from solrconfig.xml)
// matching that name
RequestParser solrParser = coreGetParserByName(p);
// RequestParser is the only plugin class that knows about
// HttpServletRequest, it builds up the SolrRequest (aka
// SolrQueryRequest) which contains the SolrParams and streams
SolrRequest solrReq = solrParser.parse(req);
// does exactly what it does now: picks the RequestHandler to
// use based on the params, calls it's handleRequest method
core.execute(solrReq, solrRsp)
// the rest of this is cut/paste from the current SolrServlet.
// use SolrParams to pick OutputWriter name, ask core for instance,
// have that writer write the results.
QueryResponseWriter responseWriter = core.getQueryResponseWriter(solrReq);
response.setContentType(responseWriter.getContentType(solrReq, solrRsp));
PrintWriter out = response.getWriter();
responseWriter.write(out, solrReq, solrRsp);
}
}
-Hoss
