roda.rb in instana-1.12.0

- old
+ new
@@ -1,6 +1,47 @@
 require "instana/rack"
 
+module Instana
+  module RodaPathTemplateExtractor
+    module RequestMethods
+      TERM = defined?(::Roda) ? ::Roda::RodaPlugins::Base::RequestMethods::TERM : Object
+      
+      def if_match(args, &blk)
+        path = @remaining_path
+        captures = @captures.clear
+  
+        if match_all(args)
+          (env['INSTANA_PATH_TEMPLATE_FRAGMENTS'] ||= []).concat(named_args(args, blk))
+          block_result(blk.(*captures))
+          env['INSTANA_HTTP_PATH_TEMPLATE'] = env['INSTANA_PATH_TEMPLATE_FRAGMENTS']
+            .join('/')
+            .prepend('/')
+          throw :halt, response.finish
+        else
+          @remaining_path = path
+          false
+        end
+      end
+      
+      def named_args(args, blk)  
+        parameters = blk.parameters      
+        args.map do |a| 
+          case a
+          when String
+            a
+          when TERM
+            nil
+          else
+            _, name = parameters.pop
+            "{#{name}}"
+          end
+        end.compact
+      end  
+    end
+  end
+end
+
 if defined?(::Roda)
   ::Instana.logger.debug "Instrumenting Roda"
   Roda.use ::Instana::Rack
+  Roda.plugin ::Instana::RodaPathTemplateExtractor
 end