func lightstepTracerFactory()

in tracing/impl/lightstep_tracer.go [35:71]

• 30 lines of code
• 8 McCabe index (conditional complexity)

func lightstepTracerFactory(config map[string]string) (opentracing.Tracer, io.Closer, error) {
	options := lightstep.Options{
		Tags: map[string]interface{}{},
	}

	// Convert the configuration map into a jaeger configuration
	for k, v := range config {
		mapper := lightstepConfigMapper[k]
		if k == keyStrictConnectionParsing {
			continue
		}

		if mapper != nil {
			err := mapper(&options, v)
			if err != nil {
				return nil, nil, err
			}
		} else {
			if config[keyStrictConnectionParsing] != "" {
				return nil, nil, fmt.Errorf("lightstep tracer: invalid option: %s: %w", k, ErrConfiguration)
			}

			log.Printf("lightstep tracer: warning: ignoring unknown configuration option: %s", k)
		}
	}

	if options.AccessToken == "" {
		return nil, nil, fmt.Errorf("failed to parse access_token from config: %q: %w", config, ErrConfiguration)
	}

	tracer := lightstep.NewTracer(options)
	if tracer == nil {
		return nil, nil, fmt.Errorf("lightstep tracer: unable to create tracer, review log messages: %w", ErrConfiguration)
	}

	return tracer, &lightstepCloser{tracer}, nil
}