package tracer import ( "context" "go.unistack.org/micro/v4/options" ) var _ Tracer = (*noopTracer)(nil) type noopTracer struct { opts Options } func (t *noopTracer) Start(ctx context.Context, name string, opts ...options.Option) (context.Context, Span) { span := &noopSpan{ name: name, ctx: ctx, tracer: t, opts: NewSpanOptions(opts...), } if span.ctx == nil { span.ctx = context.Background() } return NewSpanContext(ctx, span), span } func (t *noopTracer) Flush(ctx context.Context) error { return nil } func (t *noopTracer) Init(opts ...options.Option) error { for _, o := range opts { o(&t.opts) } return nil } func (t *noopTracer) Name() string { return t.opts.Name } type noopSpan struct { ctx context.Context tracer Tracer name string opts SpanOptions status SpanStatus statusMsg string } func (s *noopSpan) Finish(opts ...options.Option) { } func (s *noopSpan) Context() context.Context { return s.ctx } func (s *noopSpan) Tracer() Tracer { return s.tracer } func (s *noopSpan) AddEvent(name string, opts ...options.Option) { } func (s *noopSpan) SetName(name string) { s.name = name } func (s *noopSpan) SetLabels(labels ...interface{}) { s.opts.Labels = labels } func (s *noopSpan) AddLabels(labels ...interface{}) { s.opts.Labels = append(s.opts.Labels, labels...) } func (s *noopSpan) Kind() SpanKind { return s.opts.Kind } func (s *noopSpan) Status() (SpanStatus, string) { return s.status, s.statusMsg } func (s *noopSpan) SetStatus(st SpanStatus, msg string) { s.status = st s.statusMsg = msg } // NewTracer returns new memory tracer func NewTracer(opts ...options.Option) Tracer { return &noopTracer{ opts: NewOptions(opts...), } }