Class ProxyTracer

constructor

• new ProxyTracer(_provider, name, version?, options?): ProxyTracer

• Parameters

  • _provider: TracerDelegator
  • name: string
  • Optional version: string
  • Optional options: TracerOptions

  Returns ProxyTracer

Readonly name

Optional Readonly options

Optional Readonly version

startActiveSpan

• startActiveSpan<F>(_name, _options, _context?, _fn?): ReturnType<F>

• Starts a new Span and calls the given function passing it the created span as first argument. Additionally the new span gets set in context and this context is activated for the duration of the function call.

  Type Parameters

  • F extends ((span) => unknown)

  Parameters

  • _name: string

    The name of the span
  • _options: SpanOptions | F

    function called in the context of the span and receives the newly created span as an argument
  • Optional _context: Context | F
  • Optional _fn: F

  Returns ReturnType<F>

  return value of fn

  Example

  const something = tracer.startActiveSpan('op', span => {
        try {
          do some work
          span.setStatus({code: SpanStatusCode.OK});
          return something;
        } catch (err) {
          span.setStatus({
            code: SpanStatusCode.ERROR,
            message: err.message,
          });
          throw err;
        } finally {
          span.end();
        }
      });
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  Example

  const span = tracer.startActiveSpan('op', span => {
        try {
          do some work
          return span;
        } catch (err) {
          span.setStatus({
            code: SpanStatusCode.ERROR,
            message: err.message,
          });
          throw err;
        }
      });
      do some more work
      span.end();
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startSpan

• startSpan(name, options?, context?): Span

• Starts a new Span. Start the span without setting it on context.

  This method do NOT modify the current Context.

  Parameters

  • name: string

    The name of the span
  • Optional options: SpanOptions

    SpanOptions used for span creation
  • Optional context: Context

    Context to use to extract parent

  Returns Span

  Span The newly created span

  Example

  const span = tracer.startSpan('op');
      span.setAttribute('key', 'value');
      span.end();
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