64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
package logger
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import (
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"context"
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"io"
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"log/slog"
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"os"
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"strings"
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"go.opentelemetry.io/otel/trace"
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)
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type otlpHandler struct {
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slog.Handler
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}
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func Init() {
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levelStr := strings.ToLower(os.Getenv("LOG_LEVEL"))
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var level slog.Level
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switch levelStr {
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case "debug":
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level = slog.LevelDebug
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case "warn":
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level = slog.LevelWarn
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case "error":
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level = slog.LevelError
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default:
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level = slog.LevelInfo
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}
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var writer io.Writer = os.Stdout
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if level == slog.LevelDebug {
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file, _ := os.OpenFile("app.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
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writer = io.MultiWriter(os.Stdout, file)
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}
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opts := &slog.HandlerOptions{
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Level: level,
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AddSource: true,
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ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
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if a.Key == slog.TimeKey {
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return slog.String(a.Key, a.Value.Time().Format("2006-01-02 15:04:05"))
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}
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return a
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},
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}
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baseHandler := slog.NewJSONHandler(writer, opts)
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handler := &otlpHandler{baseHandler}
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logger := slog.New(handler)
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slog.SetDefault(logger)
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}
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func (h *otlpHandler) Handle(ctx context.Context, r slog.Record) error {
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span := trace.SpanFromContext(ctx)
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if span.SpanContext().HasTraceID() {
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r.AddAttrs(
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slog.String("trace_id", span.SpanContext().TraceID().String()),
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slog.String("span_id", span.SpanContext().SpanID().String()),
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)
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}
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return h.Handler.Handle(ctx, r)
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}
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