Merge pull request #36 from codeclimate/time_service_calls

Time service call time.

Author: calavera

lib/cc/service/invocation/with_metrics.rb

@@ -7,18 +7,27 @@ def initialize(invocation, statsd, prefix = nil)
     end
 
     def call
+      start_time = Time.now
+      
       result = @invocation.call
       @statsd.increment(success_key)
 
       result
     rescue => ex
       @statsd.increment(error_key(ex))
       raise ex
+    ensure
+      duration = ((Time.now - start_time) * 1_000)
+      @statsd.timing(timing_key, duration)
     end
 
     def success_key
       ["services.invocations", @prefix].compact.join('.')
     end
+    
+    def timing_key
+      ["services.timing", @prefix].compact.join('.')
+    end
 
     def error_key(ex)
       ["services.errors", @prefix, "#{ex.class.name.underscore}"].compact.join('.')