private void loadQueries(String indexName) {
   IndexService indexService = percolatorIndexService();
   IndexShard shard = indexService.shard(0);
   Engine.Searcher searcher = shard.searcher();
   try {
     // create a query to fetch all queries that are registered under the index name (which is the
     // type
     // in the percolator).
     Query query = new DeletionAwareConstantScoreQuery(indexQueriesFilter(indexName));
     QueriesLoaderCollector queries = new QueriesLoaderCollector();
     searcher.searcher().search(query, queries);
     percolator.addQueries(queries.queries());
   } catch (IOException e) {
     throw new PercolatorException(index, "failed to load queries from percolator index");
   } finally {
     searcher.release();
   }
 }
 public PercolatorExecutor.Response percolate(PercolatorExecutor.SourceRequest request)
     throws PercolatorException {
   return percolator.percolate(request);
 }