logger: slog break import cycle

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

fsm/fsm_test.go

@@ -17,7 +17,7 @@ func TestFSMStart(t *testing.T) {
 
 	wrapper := func(next StateFunc) StateFunc {
 		return func(sctx context.Context, s State, opts ...StateOption) (State, error) {
-			sctx = logger.NewContext(sctx, logger.Fields("state", s.Name()))
+			sctx = logger.NewContext(sctx, logger.Attrs("state", s.Name()))
 			return next(sctx, s, opts...)
 		}
 	}

logger/logger.go

@@ -1,26 +1,25 @@
 // Package logger provides a log interface
-package logger // import "go.unistack.org/micro/v4/logger"
+package logger
 
 import (
 	"context"
-	"os"
 
 	"go.unistack.org/micro/v4/options"
 )
 
-var (
-	// DefaultLogger variable
-	DefaultLogger = NewLogger(WithLevel(ParseLevel(os.Getenv("MICRO_LOG_LEVEL"))))
-	// DefaultLevel used by logger
-	DefaultLevel = InfoLevel
-	// DefaultCallerSkipCount used by logger
-	DefaultCallerSkipCount = 2
-)
-
 type ContextAttrFunc func(ctx context.Context) []interface{}
 
 var DefaultContextAttrFuncs []ContextAttrFunc
 
+var (
+	// DefaultLogger variable
+	DefaultLogger = NewLogger()
+	// DefaultLevel used by logger
+	DefaultLevel = InfoLevel
+	// DefaultCallerSkipCount used by logger
+	DefaultCallerSkipCount = 2
+)
+
 // Logger is a generic logging interface
 type Logger interface {
 	// Init initialises options

logger/noop.go

@@ -0,0 +1,71 @@
+package logger
+
+import (
+	"context"
+
+	"go.unistack.org/micro/v4/options"
+)
+
+type noopLogger struct {
+	opts Options
+}
+
+func NewLogger(opts ...options.Option) Logger {
+	options := NewOptions(opts...)
+	return &noopLogger{opts: options}
+}
+
+func (l *noopLogger) V(lvl Level) bool {
+	return false
+}
+
+func (l *noopLogger) Level(lvl Level) {
+}
+
+func (l *noopLogger) Init(opts ...options.Option) error {
+	for _, o := range opts {
+		o(&l.opts)
+	}
+	return nil
+}
+
+func (l *noopLogger) Clone(opts ...options.Option) Logger {
+	nl := &noopLogger{opts: l.opts}
+	for _, o := range opts {
+		o(&nl.opts)
+	}
+	return nl
+}
+
+func (l *noopLogger) Attrs(attrs ...interface{}) Logger {
+	return l
+}
+
+func (l *noopLogger) Options() Options {
+	return l.opts
+}
+
+func (l *noopLogger) String() string {
+	return "noop"
+}
+
+func (l *noopLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+}

logger/options.go

@@ -2,7 +2,9 @@ package logger
 
 import (
 	"context"
+	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"reflect"
 
@@ -26,6 +28,14 @@ type Options struct {
 	CallerSkipCount int
 	// ContextAttrFuncs contains funcs that executed before log func on context
 	ContextAttrFuncs []ContextAttrFunc
+	// TimeKey is the key used for the time of the log call
+	TimeKey string
+	// LevelKey is the key used for the level of the log call
+	LevelKey string
+	// MessageKey is the key used for the message of the log call
+	MessageKey string
+	// SourceKey is the key used for the source file and line of the log call
+	SourceKey string
 }
 
 // NewOptions creates new options struct
@@ -38,6 +48,9 @@ func NewOptions(opts ...options.Option) Options {
 		Context:          context.Background(),
 		ContextAttrFuncs: DefaultContextAttrFuncs,
 	}
+
+	WithMicroKeys()(&options)
+
 	for _, o := range opts {
 		o(&options)
 	}
@@ -45,18 +58,19 @@ func NewOptions(opts ...options.Option) Options {
 }
 
 // WithContextAttrFuncs appends default funcs for the context arrts filler
-func WithContextAttrFuncs(attrs ...interface{}) options.Option {
+func WithContextAttrFuncs(fncs ...ContextAttrFunc) options.Option {
 	return func(src interface{}) error {
 		v, err := options.Get(src, ".ContextAttrFuncs")
 		if err != nil {
 			return err
 		} else if rutil.IsZero(v) {
-			v = reflect.MakeSlice(reflect.TypeOf(v), 0, len(attrs)).Interface()
+			v = reflect.MakeSlice(reflect.TypeOf(v), 0, len(fncs)).Interface()
 		}
 		cv := reflect.ValueOf(v)
-		for _, l := range attrs {
+		for _, l := range fncs {
 			cv = reflect.Append(cv, reflect.ValueOf(l))
 		}
+		fmt.Printf("EEEE %#+v\n", cv.Interface())
 		return options.Set(src, cv.Interface(), ".ContextAttrFuncs")
 	}
 }
@@ -88,3 +102,79 @@ func WithCallerSkipCount(c int) options.Option {
 		return options.Set(src, c, ".CallerSkipCount")
 	}
 }
+
+func WithZapKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, "@timestamp", ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "level", ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "msg", ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+func WithZerologKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, "time", ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "level", ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "message", ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+func WithSlogKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, slog.TimeKey, ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, slog.LevelKey, ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, slog.MessageKey, ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, slog.SourceKey, ".SourceKey"); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+func WithMicroKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, "timestamp", ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "level", ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "msg", ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
+			return err
+		}
+		return nil
+	}
+}

logger/slog/slog.go

@@ -1,4 +1,4 @@
-package logger
+package slog
 
 import (
 	"context"
@@ -8,7 +8,9 @@ import (
 	"strconv"
 	"time"
 
+	"go.unistack.org/micro/v4/logger"
 	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 var (
@@ -20,29 +22,32 @@ var (
 	fatalValue = slog.StringValue("fatal")
 )
 
-var renameAttr = func(_ []string, a slog.Attr) slog.Attr {
+func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
 	switch a.Key {
 	case slog.SourceKey:
 		source := a.Value.Any().(*slog.Source)
 		a.Value = slog.StringValue(source.File + ":" + strconv.Itoa(source.Line))
-		a.Key = "caller"
+		a.Key = s.opts.SourceKey
 	case slog.TimeKey:
-		a.Key = "timestamp"
+		a.Key = s.opts.TimeKey
+	case slog.MessageKey:
+		a.Key = s.opts.MessageKey
 	case slog.LevelKey:
 		level := a.Value.Any().(slog.Level)
 		lvl := slogToLoggerLevel(level)
+		a.Key = s.opts.LevelKey
 		switch {
-		case lvl < DebugLevel:
+		case lvl < logger.DebugLevel:
 			a.Value = traceValue
-		case lvl < InfoLevel:
+		case lvl < logger.InfoLevel:
 			a.Value = debugValue
-		case lvl < WarnLevel:
+		case lvl < logger.WarnLevel:
 			a.Value = infoValue
-		case lvl < ErrorLevel:
+		case lvl < logger.ErrorLevel:
 			a.Value = warnValue
-		case lvl < FatalLevel:
+		case lvl < logger.FatalLevel:
 			a.Value = errorValue
-		case lvl >= FatalLevel:
+		case lvl >= logger.FatalLevel:
 			a.Value = fatalValue
 		default:
 			a.Value = infoValue
@@ -55,10 +60,10 @@ var renameAttr = func(_ []string, a slog.Attr) slog.Attr {
 type slogLogger struct {
 	slog    *slog.Logger
 	leveler *slog.LevelVar
-	opts    Options
+	opts    logger.Options
 }
 
-func (s *slogLogger) Clone(opts ...options.Option) Logger {
+func (s *slogLogger) Clone(opts ...options.Option) logger.Logger {
 	options := s.opts
 
 	for _, o := range opts {
@@ -69,14 +74,16 @@ func (s *slogLogger) Clone(opts ...options.Option) Logger {
 		opts: options,
 	}
 
-	if slog, ok := s.opts.Context.Value(loggerKey{}).(*slog.Logger); ok {
-		l.slog = slog
-		return nil
-	}
+	/*
+		if slog, ok := s.opts.Context.Value(loggerKey{}).(*slog.Logger); ok {
+			l.slog = slog
+			return nil
+		}
+	*/
 
 	l.leveler = new(slog.LevelVar)
 	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: renameAttr,
+		ReplaceAttr: s.renameAttr,
 		Level:       l.leveler,
 		AddSource:   true,
 	}
@@ -87,25 +94,25 @@ func (s *slogLogger) Clone(opts ...options.Option) Logger {
 	return l
 }
 
-func (s *slogLogger) V(level Level) bool {
+func (s *slogLogger) V(level logger.Level) bool {
 	return s.opts.Level.Enabled(level)
 }
 
-func (s *slogLogger) Level(level Level) {
+func (s *slogLogger) Level(level logger.Level) {
 	s.leveler.Set(loggerToSlogLevel(level))
 }
 
-func (s *slogLogger) Options() Options {
+func (s *slogLogger) Options() logger.Options {
 	return s.opts
 }
 
-func (s *slogLogger) Attrs(attrs ...interface{}) Logger {
+func (s *slogLogger) Attrs(attrs ...interface{}) logger.Logger {
 	nl := &slogLogger{opts: s.opts}
 	nl.leveler = new(slog.LevelVar)
 	nl.leveler.Set(s.leveler.Level())
 
 	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: renameAttr,
+		ReplaceAttr: nl.renameAttr,
 		Level:       s.leveler,
 		AddSource:   true,
 	}
@@ -117,20 +124,25 @@ func (s *slogLogger) Attrs(attrs ...interface{}) Logger {
 }
 
 func (s *slogLogger) Init(opts ...options.Option) error {
+	if len(s.opts.ContextAttrFuncs) == 0 {
+		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
+	}
 	for _, o := range opts {
 		if err := o(&s.opts); err != nil {
 			return err
 		}
 	}
 
-	if slog, ok := s.opts.Context.Value(loggerKey{}).(*slog.Logger); ok {
-		s.slog = slog
-		return nil
-	}
+	/*
+		if slog, ok := s.opts.Context.Value(loggerKey{}).(*slog.Logger); ok {
+			s.slog = slog
+			return nil
+		}
+	*/
 
 	s.leveler = new(slog.LevelVar)
 	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: renameAttr,
+		ReplaceAttr: s.renameAttr,
 		Level:       s.leveler,
 		AddSource:   true,
 	}
@@ -141,7 +153,7 @@ func (s *slogLogger) Init(opts ...options.Option) error {
 	return nil
 }
 
-func (s *slogLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
+func (s *slogLogger) Log(ctx context.Context, lvl logger.Level, msg string, attrs ...interface{}) {
 	if !s.V(lvl) {
 		return
 	}
@@ -149,77 +161,86 @@ func (s *slogLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...in
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), loggerToSlogLevel(lvl), msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
 }
 
 func (s *slogLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
-	if !s.V(InfoLevel) {
+	if !s.V(logger.InfoLevel) {
 		return
 	}
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), slog.LevelInfo, msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
 }
 
 func (s *slogLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
-	if !s.V(InfoLevel) {
+	if !s.V(logger.DebugLevel) {
 		return
 	}
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), slog.LevelDebug, msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
 }
 
 func (s *slogLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
-	if !s.V(InfoLevel) {
+	if !s.V(logger.TraceLevel) {
 		return
 	}
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), slog.LevelDebug-1, msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
 }
 
 func (s *slogLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
-	if !s.V(InfoLevel) {
+	if !s.V(logger.ErrorLevel) {
 		return
 	}
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), slog.LevelError, msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == "error" {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
 	_ = s.slog.Handler().Handle(ctx, r)
 }
 
 func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
-	if !s.V(InfoLevel) {
+	if !s.V(logger.FatalLevel) {
 		return
 	}
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), slog.LevelError+1, msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
@@ -227,14 +248,14 @@ func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}
 }
 
 func (s *slogLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
-	if !s.V(InfoLevel) {
+	if !s.V(logger.WarnLevel) {
 		return
 	}
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), slog.LevelWarn, msg, pcs[0])
 	for _, fn := range s.opts.ContextAttrFuncs {
-		attrs = append(attrs, fn(ctx))
+		attrs = append(attrs, fn(ctx)...)
 	}
 	r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
@@ -244,43 +265,43 @@ func (s *slogLogger) String() string {
 	return "slog"
 }
 
-func NewLogger(opts ...options.Option) Logger {
+func NewLogger(opts ...options.Option) logger.Logger {
 	l := &slogLogger{
-		opts: NewOptions(opts...),
+		opts: logger.NewOptions(opts...),
 	}
 	return l
 }
 
-func loggerToSlogLevel(level Level) slog.Level {
+func loggerToSlogLevel(level logger.Level) slog.Level {
 	switch level {
-	case DebugLevel:
+	case logger.DebugLevel:
 		return slog.LevelDebug
-	case WarnLevel:
+	case logger.WarnLevel:
 		return slog.LevelWarn
-	case ErrorLevel:
+	case logger.ErrorLevel:
 		return slog.LevelError
-	case TraceLevel:
+	case logger.TraceLevel:
 		return slog.LevelDebug - 1
-	case FatalLevel:
+	case logger.FatalLevel:
 		return slog.LevelError + 1
 	default:
 		return slog.LevelInfo
 	}
 }
 
-func slogToLoggerLevel(level slog.Level) Level {
+func slogToLoggerLevel(level slog.Level) logger.Level {
 	switch level {
 	case slog.LevelDebug:
-		return DebugLevel
+		return logger.DebugLevel
 	case slog.LevelWarn:
-		return WarnLevel
+		return logger.WarnLevel
 	case slog.LevelError:
-		return ErrorLevel
+		return logger.ErrorLevel
 	case slog.LevelDebug - 1:
-		return TraceLevel
+		return logger.TraceLevel
 	case slog.LevelError + 1:
-		return FatalLevel
+		return logger.FatalLevel
 	default:
-		return InfoLevel
+		return logger.InfoLevel
 	}
 }

logger/slog/slog_test.go

@@ -1,21 +1,23 @@
-package logger
+package slog
 
 import (
 	"bytes"
 	"context"
 	"log"
 	"testing"
+
+	"go.unistack.org/micro/v4/logger"
 )
 
 func TestContext(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
 
-	nl, ok := FromContext(NewContext(ctx, l.Attrs("key", "val")))
+	nl, ok := logger.FromContext(logger.NewContext(ctx, l.Attrs("key", "val")))
 	if !ok {
 		t.Fatal("context without logger")
 	}
@@ -28,7 +30,7 @@ func TestContext(t *testing.T) {
 func TestAttrs(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
@@ -45,15 +47,15 @@ func TestFromContextWithFields(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
 	var ok bool
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
 	nl := l.Attrs("key", "val")
 
-	ctx = NewContext(ctx, nl)
+	ctx = logger.NewContext(ctx, nl)
 
-	l, ok = FromContext(ctx)
+	l, ok = logger.FromContext(ctx)
 	if !ok {
 		t.Fatalf("context does not have logger")
 	}
@@ -67,11 +69,11 @@ func TestFromContextWithFields(t *testing.T) {
 func TestClone(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
-	nl := l.Clone(WithLevel(ErrorLevel))
+	nl := l.Clone(logger.WithLevel(logger.ErrorLevel))
 	if err := nl.Init(); err != nil {
 		t.Fatal(err)
 	}
@@ -87,11 +89,11 @@ func TestClone(t *testing.T) {
 
 func TestRedirectStdLogger(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(ErrorLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
-	fn := RedirectStdLogger(l, ErrorLevel)
+	fn := logger.RedirectStdLogger(l, logger.ErrorLevel)
 	defer fn()
 	log.Print("test")
 	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"error"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test"`))) {
@@ -101,11 +103,11 @@ func TestRedirectStdLogger(t *testing.T) {
 
 func TestStdLogger(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}
-	lg := NewStdLogger(l, ErrorLevel)
+	lg := logger.NewStdLogger(l, logger.ErrorLevel)
 	lg.Print("test")
 	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"error"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test"`))) {
 		t.Fatalf("logger error, buf %s", buf.Bytes())
@@ -115,7 +117,7 @@ func TestStdLogger(t *testing.T) {
 func TestLogger(t *testing.T) {
 	ctx := context.TODO()
 	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
 	if err := l.Init(); err != nil {
 		t.Fatal(err)
 	}

tracer/noop.go

@@ -27,8 +27,8 @@ func (t *noopTracer) Start(ctx context.Context, name string, opts ...options.Opt
 		labels: options.Labels,
 		kind:   options.Kind,
 	}
-	span.spanID, _ = id.New()
-	span.traceID, _ = id.New()
+	span.spanID.s, _ = id.New()
+	span.traceID.s, _ = id.New()
 	if span.ctx == nil {
 		span.ctx = context.Background()
 	}
@@ -56,18 +56,26 @@ type noopEvent struct {
 	labels []interface{}
 }
 
+type noopStringer struct {
+	s string
+}
+
+func (s noopStringer) String() string {
+	return s.s
+}
+
 type noopSpan struct {
 	ctx       context.Context
 	tracer    Tracer
 	name      string
 	statusMsg string
+	traceID   noopStringer
+	spanID    noopStringer
 	events    []*noopEvent
 	labels    []interface{}
 	logs      []interface{}
 	kind      SpanKind
 	status    SpanStatus
-	traceID   string
-	spanID    string
 }
 
 func (s *noopSpan) Finish(opts ...options.Option) {
@@ -103,11 +111,11 @@ func (s *noopSpan) Kind() SpanKind {
 }
 
 func (s *noopSpan) TraceID() string {
-	return s.traceID
+	return s.traceID.String()
 }
 
 func (s *noopSpan) SpanID() string {
-	return s.spanID
+	return s.spanID.String()
 }
 
 func (s *noopSpan) Status() (SpanStatus, string) {

tracer/tracer_test.go

@@ -0,0 +1,28 @@
+package tracer_test
+
+import (
+	"bytes"
+	"context"
+	"strings"
+	"testing"
+
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/logger/slog"
+	"go.unistack.org/micro/v4/tracer"
+)
+
+func TestLoggerWithTracer(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	logger.DefaultLogger = slog.NewLogger(logger.WithOutput(buf))
+
+	if err := logger.Init(); err != nil {
+		t.Fatal(err)
+	}
+	var span tracer.Span
+	ctx, span = tracer.DefaultTracer.Start(ctx, "test")
+	logger.Info(ctx, "msg")
+	if !strings.Contains(buf.String(), span.TraceID()) {
+		t.Fatalf("log does not contains tracer id")
+	}
+}