futzing with redis a bit

rails/hamster/app/helpers/solr_helper.rb

@@ -1,9 +1,20 @@
 module SolrHelper
   $select_url = 'http://localhost:8983/solr/select/'
+  $redis = '/home/me/repos/redis.git/src/redis-cli'
 
   def get_results(search)
+    cached = `#{$redis} GET "query:#{search}"`
+
+    if cached.strip().length > 0
+      # puts "cached=#{cached}"
+      xml_results = REXML::Document.new cached
+    else
       raw_results = open("#{$select_url}?q=#{search}").read
+      # puts "caching '#{raw_results}'"
+      `#{$redis} SET "query:#{search}" '#{raw_results}'`
+
       xml_results = REXML::Document.new raw_results
+    end
 
     results = []
     REXML::XPath.each(xml_results, '//result/doc') do |doc|