vendor/github.com/sirupsen/logrus/example_basic_test.go

   1 package logrus_test
   2
   3 import (
   4         "github.com/sirupsen/logrus"
   5         "os"
   6 )
   7
   8 func Example_basic() {
   9         var log = logrus.New()
  10         log.Formatter = new(logrus.JSONFormatter)
  11         log.Formatter = new(logrus.TextFormatter)                     //default
  12         log.Formatter.(*logrus.TextFormatter).DisableTimestamp = true // remove timestamp from test output
  13         log.Level = logrus.DebugLevel
  14         log.Out = os.Stdout
  15
  16         // file, err := os.OpenFile("logrus.log", os.O_CREATE|os.O_WRONLY, 0666)
  17         // if err == nil {
  18         //      log.Out = file
  19         // } else {
  20         //      log.Info("Failed to log to file, using default stderr")
  21         // }
  22
  23         defer func() {
  24                 err := recover()
  25                 if err != nil {
  26                         entry := err.(*logrus.Entry)
  27                         log.WithFields(logrus.Fields{
  28                                 "omg":         true,
  29                                 "err_animal":  entry.Data["animal"],
  30                                 "err_size":    entry.Data["size"],
  31                                 "err_level":   entry.Level,
  32                                 "err_message": entry.Message,
  33                                 "number":      100,
  34                         }).Error("The ice breaks!") // or use Fatal() to force the process to exit with a nonzero code
  35                 }
  36         }()
  37
  38         log.WithFields(logrus.Fields{
  39                 "animal": "walrus",
  40                 "number": 8,
  41         }).Debug("Started observing beach")
  42
  43         log.WithFields(logrus.Fields{
  44                 "animal": "walrus",
  45                 "size":   10,
  46         }).Info("A group of walrus emerges from the ocean")
  47
  48         log.WithFields(logrus.Fields{
  49                 "omg":    true,
  50                 "number": 122,
  51         }).Warn("The group's number increased tremendously!")
  52
  53         log.WithFields(logrus.Fields{
  54                 "temperature": -4,
  55         }).Debug("Temperature changes")
  56
  57         log.WithFields(logrus.Fields{
  58                 "animal": "orca",
  59                 "size":   9009,
  60         }).Panic("It's over 9000!")
  61
  62         // Output:
  63         // level=debug msg="Started observing beach" animal=walrus number=8
  64         // level=info msg="A group of walrus emerges from the ocean" animal=walrus size=10
  65         // level=warning msg="The group's number increased tremendously!" number=122 omg=true
  66         // level=debug msg="Temperature changes" temperature=-4
  67         // level=panic msg="It's over 9000!" animal=orca size=9009
  68         // level=error msg="The ice breaks!" err_animal=orca err_level=panic err_message="It's over 9000!" err_size=9009 number=100 omg=true
  69 }