logger/slog: backport default logger keys from master

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

logger/logger.go

@@ -6,6 +6,10 @@ import (
 	"os"
 )
 
+type ContextAttrFunc func(ctx context.Context) []interface{}
+
+var DefaultContextAttrFuncs []ContextAttrFunc
+
 var (
 	// DefaultLogger variable
 	DefaultLogger = NewLogger(WithLevel(ParseLevel(os.Getenv("MICRO_LOG_LEVEL"))))

logger/options.go

@@ -3,6 +3,7 @@ package logger
 import (
 	"context"
 	"io"
+	"log/slog"
 	"os"
 )
 
@@ -21,6 +22,18 @@ type Options struct {
 	Fields []interface{}
 	// CallerSkipCount number of frmaes to skip
 	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
+	// StacktraceKey is the key used for the stacktrace
+	StacktraceKey string
 	// Stacktrace controls writing of stacktaces on error
 	Stacktrace bool
 	// The logging level the logger should log
@@ -30,18 +43,29 @@ type Options struct {
 // NewOptions creates new options struct
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Level:           DefaultLevel,
-		Fields:          make([]interface{}, 0, 6),
-		Out:             os.Stderr,
-		CallerSkipCount: DefaultCallerSkipCount,
-		Context:         context.Background(),
+		Level:            DefaultLevel,
+		Fields:           make([]interface{}, 0, 6),
+		Out:              os.Stderr,
+		CallerSkipCount:  DefaultCallerSkipCount,
+		Context:          context.Background(),
+		ContextAttrFuncs: DefaultContextAttrFuncs,
 	}
+
+	WithMicroKeys()(&options)
+
 	for _, o := range opts {
 		o(&options)
 	}
 	return options
 }
 
+// WithContextAttrFuncs appends default funcs for the context arrts filler
+func WithContextAttrFuncs(fncs ...ContextAttrFunc) Option {
+	return func(o *Options) {
+		o.ContextAttrFuncs = append(o.ContextAttrFuncs, fncs...)
+	}
+}
+
 // WithFields set default fields for the logger
 func WithFields(fields ...interface{}) Option {
 	return func(o *Options) {
@@ -90,3 +114,43 @@ func WithName(n string) Option {
 		o.Name = n
 	}
 }
+
+func WithZapKeys() Option {
+	return func(o *Options) {
+		o.TimeKey = "@timestamp"
+		o.LevelKey = "level"
+		o.MessageKey = "msg"
+		o.SourceKey = "caller"
+		o.StacktraceKey = "stacktrace"
+	}
+}
+
+func WithZerologKeys() Option {
+	return func(o *Options) {
+		o.TimeKey = "time"
+		o.LevelKey = "level"
+		o.MessageKey = "message"
+		o.SourceKey = "caller"
+		o.StacktraceKey = "stacktrace"
+	}
+}
+
+func WithSlogKeys() Option {
+	return func(o *Options) {
+		o.TimeKey = slog.TimeKey
+		o.LevelKey = slog.LevelKey
+		o.MessageKey = slog.MessageKey
+		o.SourceKey = slog.SourceKey
+		o.StacktraceKey = "stacktrace"
+	}
+}
+
+func WithMicroKeys() Option {
+	return func(o *Options) {
+		o.TimeKey = "timestamp"
+		o.LevelKey = "level"
+		o.MessageKey = "msg"
+		o.SourceKey = "caller"
+		o.StacktraceKey = "stacktrace"
+	}
+}

logger/slog/options.go

@@ -1,27 +0,0 @@
-package slog
-
-import "go.unistack.org/micro/v3/logger"
-
-type sourceKey struct{}
-
-func WithSourceKey(v string) logger.Option {
-	return logger.SetOption(sourceKey{}, v)
-}
-
-type timeKey struct{}
-
-func WithTimeKey(v string) logger.Option {
-	return logger.SetOption(timeKey{}, v)
-}
-
-type messageKey struct{}
-
-func WithMessageKey(v string) logger.Option {
-	return logger.SetOption(messageKey{}, v)
-}
-
-type levelKey struct{}
-
-func WithLevelKey(v string) logger.Option {
-	return logger.SetOption(levelKey{}, v)
-}

logger/slog/slog.go

@@ -17,13 +17,6 @@ import (
 
 var reTrace = regexp.MustCompile(`.*/slog/logger\.go.*\n`)
 
-var (
-	DefaultSourceKey  = slog.SourceKey
-	DefaultTimeKey    = slog.TimeKey
-	DefaultMessageKey = slog.MessageKey
-	DefaultLevelKey   = slog.LevelKey
-)
-
 var (
 	traceValue = slog.StringValue("trace")
 	debugValue = slog.StringValue("debug")
@@ -38,15 +31,15 @@ func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
 	case slog.SourceKey:
 		source := a.Value.Any().(*slog.Source)
 		a.Value = slog.StringValue(source.File + ":" + strconv.Itoa(source.Line))
-		a.Key = s.sourceKey
+		a.Key = s.opts.SourceKey
 	case slog.TimeKey:
-		a.Key = s.timeKey
+		a.Key = s.opts.TimeKey
 	case slog.MessageKey:
-		a.Key = s.messageKey
+		a.Key = s.opts.MessageKey
 	case slog.LevelKey:
 		level := a.Value.Any().(slog.Level)
 		lvl := slogToLoggerLevel(level)
-		a.Key = s.levelKey
+		a.Key = s.opts.LevelKey
 		switch {
 		case lvl < logger.DebugLevel:
 			a.Value = traceValue
@@ -69,14 +62,10 @@ func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
 }
 
 type slogLogger struct {
-	slog       *slog.Logger
-	leveler    *slog.LevelVar
-	levelKey   string
-	messageKey string
-	sourceKey  string
-	timeKey    string
-	opts       logger.Options
-	mu         sync.RWMutex
+	slog    *slog.Logger
+	leveler *slog.LevelVar
+	opts    logger.Options
+	mu      sync.RWMutex
 }
 
 func (s *slogLogger) Clone(opts ...logger.Option) logger.Logger {
@@ -88,24 +77,7 @@ func (s *slogLogger) Clone(opts ...logger.Option) logger.Logger {
 	}
 
 	l := &slogLogger{
-		opts:       options,
-		levelKey:   s.levelKey,
-		messageKey: s.messageKey,
-		sourceKey:  s.sourceKey,
-		timeKey:    s.timeKey,
-	}
-
-	if v, ok := l.opts.Context.Value(levelKey{}).(string); ok && v != "" {
-		l.levelKey = v
-	}
-	if v, ok := l.opts.Context.Value(messageKey{}).(string); ok && v != "" {
-		l.messageKey = v
-	}
-	if v, ok := l.opts.Context.Value(sourceKey{}).(string); ok && v != "" {
-		l.sourceKey = v
-	}
-	if v, ok := l.opts.Context.Value(timeKey{}).(string); ok && v != "" {
-		l.timeKey = v
+		opts: options,
 	}
 
 	l.leveler = new(slog.LevelVar)
@@ -137,13 +109,7 @@ func (s *slogLogger) Options() logger.Options {
 
 func (s *slogLogger) Fields(attrs ...interface{}) logger.Logger {
 	s.mu.RLock()
-	nl := &slogLogger{
-		opts:       s.opts,
-		levelKey:   s.levelKey,
-		messageKey: s.messageKey,
-		sourceKey:  s.sourceKey,
-		timeKey:    s.timeKey,
-	}
+	nl := &slogLogger{opts: s.opts}
 	nl.leveler = new(slog.LevelVar)
 	nl.leveler.Set(s.leveler.Level())
 
@@ -163,21 +129,13 @@ func (s *slogLogger) Fields(attrs ...interface{}) logger.Logger {
 
 func (s *slogLogger) Init(opts ...logger.Option) error {
 	s.mu.Lock()
-	for _, o := range opts {
-		o(&s.opts)
+
+	if len(s.opts.ContextAttrFuncs) == 0 {
+		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
 	}
 
-	if v, ok := s.opts.Context.Value(levelKey{}).(string); ok && v != "" {
-		s.levelKey = v
-	}
-	if v, ok := s.opts.Context.Value(messageKey{}).(string); ok && v != "" {
-		s.messageKey = v
-	}
-	if v, ok := s.opts.Context.Value(sourceKey{}).(string); ok && v != "" {
-		s.sourceKey = v
-	}
-	if v, ok := s.opts.Context.Value(timeKey{}).(string); ok && v != "" {
-		s.timeKey = v
+	for _, o := range opts {
+		o(&s.opts)
 	}
 
 	s.leveler = new(slog.LevelVar)
@@ -190,8 +148,6 @@ func (s *slogLogger) Init(opts ...logger.Option) error {
 	handler := slog.NewJSONHandler(s.opts.Out, handleOpt)
 	s.slog = slog.New(handler).With(s.opts.Fields...)
 
-	slog.SetDefault(s.slog)
-
 	s.mu.Unlock()
 
 	return nil
@@ -204,6 +160,15 @@ func (s *slogLogger) Log(ctx context.Context, lvl logger.Level, attrs ...interfa
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), loggerToSlogLevel(lvl), fmt.Sprintf("%s", attrs[0]), pcs[0])
+	if s.opts.Stacktrace && lvl == logger.ErrorLevel {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				r.AddAttrs(slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1]))
+			}
+		}
+	}
 	// r.Add(attrs[1:]...)
 	_ = s.slog.Handler().Handle(ctx, r)
 }
@@ -215,6 +180,15 @@ func (s *slogLogger) Logf(ctx context.Context, lvl logger.Level, msg string, att
 	var pcs [1]uintptr
 	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
 	r := slog.NewRecord(time.Now(), loggerToSlogLevel(lvl), fmt.Sprintf(msg, attrs...), pcs[0])
+	if s.opts.Stacktrace && lvl == logger.ErrorLevel {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				r.AddAttrs(slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1]))
+			}
+		}
+	}
 	// r.Add(attrs...)
 	_ = s.slog.Handler().Handle(ctx, r)
 }
@@ -399,24 +373,9 @@ func (s *slogLogger) String() string {
 
 func NewLogger(opts ...logger.Option) logger.Logger {
 	s := &slogLogger{
-		opts:       logger.NewOptions(opts...),
-		sourceKey:  DefaultSourceKey,
-		timeKey:    DefaultTimeKey,
-		messageKey: DefaultMessageKey,
-		levelKey:   DefaultLevelKey,
-	}
-	if v, ok := s.opts.Context.Value(levelKey{}).(string); ok && v != "" {
-		s.levelKey = v
-	}
-	if v, ok := s.opts.Context.Value(messageKey{}).(string); ok && v != "" {
-		s.messageKey = v
-	}
-	if v, ok := s.opts.Context.Value(sourceKey{}).(string); ok && v != "" {
-		s.sourceKey = v
-	}
-	if v, ok := s.opts.Context.Value(timeKey{}).(string); ok && v != "" {
-		s.timeKey = v
+		opts: logger.NewOptions(opts...),
 	}
+
 	return s
 }