vendor/github.com/go-kit/kit/examples/stringsvc3/logging.go

   1 package main
   2
   3 import (
   4         "time"
   5
   6         "github.com/go-kit/kit/log"
   7 )
   8
   9 func loggingMiddleware(logger log.Logger) ServiceMiddleware {
  10         return func(next StringService) StringService {
  11                 return logmw{logger, next}
  12         }
  13 }
  14
  15 type logmw struct {
  16         logger log.Logger
  17         StringService
  18 }
  19
  20 func (mw logmw) Uppercase(s string) (output string, err error) {
  21         defer func(begin time.Time) {
  22                 _ = mw.logger.Log(
  23                         "method", "uppercase",
  24                         "input", s,
  25                         "output", output,
  26                         "err", err,
  27                         "took", time.Since(begin),
  28                 )
  29         }(time.Now())
  30
  31         output, err = mw.StringService.Uppercase(s)
  32         return
  33 }
  34
  35 func (mw logmw) Count(s string) (n int) {
  36         defer func(begin time.Time) {
  37                 _ = mw.logger.Log(
  38                         "method", "count",
  39                         "input", s,
  40                         "n", n,
  41                         "took", time.Since(begin),
  42                 )
  43         }(time.Now())
  44
  45         n = mw.StringService.Count(s)
  46         return
  47 }