[Go] slog

개요

• 1.21부터 지원

예제

• 코드

  •  package main
            
     import (
     	"log/slog"
     	"os"
     )
            
     func main() {
     	println("1 ---------------------------------------------")
     	{
     		slog.Debug("message", "key1", 1, "key2", 2)
     		slog.Error("message", "key1", 1, "key2", 2)
     		slog.Warn("message", "key1", 1, "key2", 2)
     		slog.Info("message", "key1", 1, "key2", 2)
     		slog.Info("usage", "cpu", 10, slog.Group("disk", "/", 50, "/home", 30))
     	}
            
     	println("\n2 ---------------------------------------------")
     	{
     		slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout, nil)))
     		slog.Debug("message", "key1", 1, "key2", 2)
     		slog.Error("message", "key1", 1, "key2", 2)
     		slog.Warn("message", "key1", 1, "key2", 2)
     		slog.Info("message", "key1", 1, "key2", 2)
     		slog.Info("usage", "cpu", 10, slog.Group("disk", "/", 50, "/home", 30))
     	}
            
     	println("\n3 ---------------------------------------------")
     	{
     		slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, nil)))
     		slog.Debug("message", "key1", 1, "key2", 2)
     		slog.Error("message", "key1", 1, "key2", 2)
     		slog.Warn("message", "key1", 1, "key2", 2)
     		slog.Info("message", "key1", 1, "key2", 2)
     		slog.Info("usage", "cpu", 10, slog.Group("disk", "/", 50, "/home", 30))
     	}
            
     	println("\n4 ---------------------------------------------")
     	{
     		slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelDebug})))
     		slog.Debug("message", "key1", 1, "key2", 2)
     		slog.Error("message", "key1", 1, "key2", 2)
     		slog.Warn("message", "key1", 1, "key2", 2)
     		slog.Info("message", "key1", 1, "key2", 2)
     		slog.Info("usage", "cpu", 10, slog.Group("disk", "/", 50, "/home", 30))
     	}
     }
    

• 실행 결과

  •  1 ---------------------------------------------
     2023/09/12 15:28:04 ERROR message key1=1 key2=2
     2023/09/12 15:28:04 WARN message key1=1 key2=2
     2023/09/12 15:28:04 INFO message key1=1 key2=2
     2023/09/12 15:28:04 INFO usage cpu=10 disk./=50 disk./home=30
            
     2 ---------------------------------------------
     time=2023-09-12T15:28:04.582+09:00 level=ERROR msg=message key1=1 key2=2
     time=2023-09-12T15:28:04.582+09:00 level=WARN msg=message key1=1 key2=2
     time=2023-09-12T15:28:04.582+09:00 level=INFO msg=message key1=1 key2=2
     time=2023-09-12T15:28:04.582+09:00 level=INFO msg=usage cpu=10 disk./=50 disk./home=30
            
     3 ---------------------------------------------
     {"time":"2023-09-12T15:28:04.582835078+09:00","level":"ERROR","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582838078+09:00","level":"WARN","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582839816+09:00","level":"INFO","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582845535+09:00","level":"INFO","msg":"usage","cpu":10,"disk":{"/":50,"/home":30}}
            
     4 ---------------------------------------------
     {"time":"2023-09-12T15:28:04.582849353+09:00","level":"DEBUG","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582853342+09:00","level":"ERROR","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582855334+09:00","level":"WARN","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582857208+09:00","level":"INFO","msg":"message","key1":1,"key2":2}
     {"time":"2023-09-12T15:28:04.582859409+09:00","level":"INFO","msg":"usage","cpu":10,"disk":{"/":50,"/home":30}}