logging.InjectFields does not work.

[taeungshin]

logging.InjectFields does not work.

// It works.
// grpc_ctxtags.Extract(ctx).Set("grpc.request.test", in.GetMessage())

// Doesn't work.
ctx = logging.InjectFields(ctx, logging.Fields {"grpc.request.test", in.GetMessage()})

Can you give me more details on how to use this?

[cgarm]

Usage examples.
A simple usage example:

package main

import (
	"context"
	"fmt"
	"log"
	"os"

	"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/logging"
)

func main() {
	l := log.New(os.Stderr, "", log.Ldate|log.Ltime|log.Lshortfile)
	logger := logging.LoggerFunc(func(_ context.Context, lvl logging.Level, msg string, fields ...any) {
		switch lvl {
		case logging.LevelDebug:
			msg = fmt.Sprintf("DEBUG :%v", msg)
		case logging.LevelInfo:
			msg = fmt.Sprintf("INFO :%v", msg)
		case logging.LevelWarn:
			msg = fmt.Sprintf("WARN :%v", msg)
		case logging.LevelError:
			msg = fmt.Sprintf("ERROR :%v", msg)
		default:
			panic(fmt.Sprintf("unknown level %v", lvl))
		}
		l.Println(append([]any{"msg", msg}, fields...))
	})

	ctx := context.Background()
	newCtx := logging.InjectFields(ctx, logging.Fields{"grpc.request.test", "abc"})
	logger.Log(newCtx, logging.LevelDebug, "Hello world!", logging.ExtractFields(newCtx)...)
}