Structured logging for go.
Example logging with global logger:
package main
import (
"errors"
"github.com/baobabus/slog"
"time"
)
func emit(i int) error {
if i % 2 == 0 {
return errors.New("Bad input")
}
return nil
}
func main () {
slog.Info().Prints("Starting conditional", "time", time.Now())
for i := 0; i < 4; i++ {
err := emit(i)
slog.On(err).Prints("Problem with emit():", "i", i)
}
slog.Info().Prints("Finished conditional", "time", time.Now())
slog.Info().Prints("Starting unconditional", "time", time.Now())
for i := 0; i < 4; i++ {
err := emit(i)
slog.With(err).Prints("Returned from emit():", "i", i)
}
slog.Info().Prints("Finished unconditional", "time", time.Now())
}Output:
INFO 2016/07/20 11:23:58 Starting conditional time=2016-07-20T11:23:58-05:00
ERROR 2016/07/20 11:23:58 Problem with emit(): i=0 - error=Bad input
ERROR 2016/07/20 11:23:58 Problem with emit(): i=2 - error=Bad input
INFO 2016/07/20 11:23:58 Finished conditional time=2016-07-20T11:23:58-05:00
INFO 2016/07/20 11:23:58 Starting unconditional time=2016-07-20T11:23:58-05:00
ERROR 2016/07/20 11:23:58 Returned from emit(): i=0 - error=Bad input
NOTICE 2016/07/20 11:23:58 Returned from emit(): i=1 - success
ERROR 2016/07/20 11:23:58 Returned from emit(): i=2 - error=Bad input
NOTICE 2016/07/20 11:23:58 Returned from emit(): i=3 - success
INFO 2016/07/20 11:23:58 Finished unconditional time=2016-07-20T11:23:58-05:00