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While less performant, its in the stdlib which is probably more suitable for an SDK. Users can register a slog handler to intercept logs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| package log | ||
|
|
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "log/slog" | ||
| "reflect" | ||
|
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| "github.com/restatedev/sdk-go/rcontext" | ||
| ) | ||
|
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| const ( | ||
| LevelTrace slog.Level = -8 | ||
| ) | ||
|
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| type typeValue struct{ inner any } | ||
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| func (t typeValue) LogValue() slog.Value { | ||
| return slog.StringValue(reflect.TypeOf(t.inner).String()) | ||
| } | ||
|
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| func Type(key string, value any) slog.Attr { | ||
| return slog.Any(key, typeValue{value}) | ||
| } | ||
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| type stringerValue[T fmt.Stringer] struct{ inner T } | ||
|
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| func (t stringerValue[T]) LogValue() slog.Value { | ||
| return slog.StringValue(t.inner.String()) | ||
| } | ||
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| func Stringer[T fmt.Stringer](key string, value T) slog.Attr { | ||
| return slog.Any(key, slog.AnyValue(stringerValue[T]{value})) | ||
| } | ||
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| func Error(err error) slog.Attr { | ||
| return slog.String("err", err.Error()) | ||
| } | ||
|
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| type Logger struct { | ||
| slog *slog.Logger | ||
| } | ||
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| func New(source rcontext.LogSource, isReplaying func() bool, h slog.Handler) *Logger { | ||
| return &Logger{slog.New(&contextInjectingHandler{source, isReplaying, h})} | ||
| } | ||
|
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| func (l *Logger) Inner() *slog.Logger { | ||
| return l.slog | ||
| } | ||
|
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| func (l *Logger) With(args ...any) *Logger { | ||
| return &Logger{slog: l.slog.With(args...)} | ||
| } | ||
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| func (l *Logger) Error(ctx context.Context, msg string, attrs ...slog.Attr) { | ||
| l.slog.LogAttrs(ctx, slog.LevelError, msg, attrs...) | ||
| } | ||
|
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| func (l *Logger) Warn(ctx context.Context, msg string, attrs ...slog.Attr) { | ||
| l.slog.LogAttrs(ctx, slog.LevelWarn, msg, attrs...) | ||
| } | ||
|
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| func (l *Logger) Info(ctx context.Context, msg string, attrs ...slog.Attr) { | ||
| l.slog.LogAttrs(ctx, slog.LevelInfo, msg, attrs...) | ||
| } | ||
|
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| func (l *Logger) Debug(ctx context.Context, msg string, attrs ...slog.Attr) { | ||
| l.slog.LogAttrs(ctx, slog.LevelDebug, msg, attrs...) | ||
| } | ||
|
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| func (l *Logger) Trace(ctx context.Context, msg string, attrs ...slog.Attr) { | ||
| l.slog.LogAttrs(ctx, LevelTrace, msg, attrs...) | ||
| } | ||
|
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| type contextInjectingHandler struct { | ||
| source rcontext.LogSource | ||
| isReplaying func() bool | ||
| inner slog.Handler | ||
| } | ||
|
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| func (d *contextInjectingHandler) Enabled(ctx context.Context, l slog.Level) bool { | ||
| return d.inner.Enabled(rcontext.WithLogContext(ctx, d.source, d.isReplaying), l) | ||
| } | ||
|
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| func (d *contextInjectingHandler) Handle(ctx context.Context, record slog.Record) error { | ||
| return d.inner.Handle(rcontext.WithLogContext(ctx, d.source, d.isReplaying), record) | ||
| } | ||
|
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| func (d *contextInjectingHandler) WithAttrs(attrs []slog.Attr) slog.Handler { | ||
| return &contextInjectingHandler{d.source, d.isReplaying, d.inner.WithAttrs(attrs)} | ||
| } | ||
|
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| func (d *contextInjectingHandler) WithGroup(name string) slog.Handler { | ||
| return &contextInjectingHandler{d.source, d.isReplaying, d.inner.WithGroup(name)} | ||
| } | ||
|
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| var _ slog.Handler = &contextInjectingHandler{} | ||
|
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| type dropReplayHandler struct { | ||
| isReplaying func() bool | ||
| inner slog.Handler | ||
| } | ||
|
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| func NewDropReplayHandler(isReplaying func() bool, handler slog.Handler) slog.Handler { | ||
| return &dropReplayHandler{isReplaying, handler} | ||
| } | ||
|
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| func (d *dropReplayHandler) Enabled(ctx context.Context, level slog.Level) bool { | ||
| if d.isReplaying() { | ||
| return false | ||
| } | ||
| return d.inner.Enabled(ctx, level) | ||
| } | ||
|
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| func (d *dropReplayHandler) Handle(ctx context.Context, record slog.Record) error { | ||
| return d.inner.Handle(ctx, record) | ||
| } | ||
|
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| func (d *dropReplayHandler) WithAttrs(attrs []slog.Attr) slog.Handler { | ||
| return &dropReplayHandler{d.isReplaying, d.inner.WithAttrs(attrs)} | ||
| } | ||
|
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| func (d *dropReplayHandler) WithGroup(name string) slog.Handler { | ||
| return &dropReplayHandler{d.isReplaying, d.inner.WithGroup(name)} | ||
| } | ||
|
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| var _ slog.Handler = &dropReplayHandler{} |
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