116 lines
2.2 KiB
Go
116 lines
2.2 KiB
Go
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package logx
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import (
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"context"
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"log/slog"
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"os"
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"time"
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)
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type Logger struct {
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handlers []Handler
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ctxExtractor ContextExtractor
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}
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type Handler interface {
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slog.Handler
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Close() error
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}
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type Option func(*Logger)
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type ContextExtractor func(context.Context) []slog.Attr
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func New(opts ...Option) *Logger {
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l := &Logger{
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ctxExtractor: defaultContextExtractor,
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}
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for _, opt := range opts {
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opt(l)
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}
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return l
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}
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func (l *Logger) WithContext(ctx context.Context) *Logger {
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newLogger := &Logger{
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handlers: make([]Handler, len(l.handlers)),
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ctxExtractor: l.ctxExtractor,
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}
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attrs := l.ctxExtractor(ctx)
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for i, h := range l.handlers {
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newHandler := h.WithAttrs(attrs)
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if handlerWithClose, ok := newHandler.(Handler); ok {
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newLogger.handlers[i] = handlerWithClose
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} else {
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newLogger.handlers[i] = &handlerWrapper{newHandler}
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}
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}
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return newLogger
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}
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type handlerWrapper struct {
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slog.Handler
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}
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func (h *handlerWrapper) Close() error {
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return nil
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}
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func (l *Logger) Debug(msg string, args ...any) {
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l.log(slog.LevelDebug, msg, args...)
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}
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func (l *Logger) Info(msg string, args ...any) {
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l.log(slog.LevelInfo, msg, args...)
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}
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func (l *Logger) Warn(msg string, args ...any) {
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l.log(slog.LevelWarn, msg, args...)
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}
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func (l *Logger) Error(msg string, args ...any) {
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l.log(slog.LevelError, msg, args...)
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}
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func (l *Logger) Fatal(msg string, args ...any) {
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l.log(slog.LevelError, msg, args...)
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os.Exit(1)
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}
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func (l *Logger) log(level slog.Level, msg string, args ...any) {
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for _, h := range l.handlers {
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if !h.Enabled(context.Background(), level) {
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continue
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}
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r := slog.NewRecord(time.Now(), level, msg, 0)
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r.Add(args...)
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_ = h.Handle(context.Background(), r)
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}
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}
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func (l *Logger) Close() error {
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for _, h := range l.handlers {
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if err := h.Close(); err != nil {
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return err
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}
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}
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return nil
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}
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func WithContextExtractor(extractor ContextExtractor) Option {
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return func(l *Logger) {
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l.ctxExtractor = extractor
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}
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}
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func defaultContextExtractor(ctx context.Context) []slog.Attr {
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return []slog.Attr{
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slog.String("trace_id", getTraceID(ctx)),
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}
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}
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func getTraceID(ctx context.Context) string {
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traceID := ctx.Value("trace_id")
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return traceID.(string)
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}
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