func()

in module/apmot/span.go [145:224]

• 73 lines of code
• 19 McCabe index (conditional complexity)

func (s *otSpan) setSpanContext() {
	var (
		dbContext       apm.DatabaseSpanContext
		component       string
		httpURL         string
		httpMethod      string
		httpHost        string
		haveDBContext   bool
		haveHTTPContext bool
		haveHTTPHostTag bool
	)
	for k, v := range s.tags {
		switch k {
		case "component":
			component = stringify(v)
		case "db.instance":
			dbContext.Instance = stringify(v)
			haveDBContext = true
		case "db.statement":
			dbContext.Statement = stringify(v)
			haveDBContext = true
		case "db.type":
			dbContext.Type = stringify(v)
			haveDBContext = true
		case "db.user":
			dbContext.User = stringify(v)
			haveDBContext = true
		case "http.url":
			haveHTTPContext = true
			httpURL = stringify(v)
		case "http.method":
			haveHTTPContext = true
			httpMethod = stringify(v)
		case "http.host":
			haveHTTPContext = true
			haveHTTPHostTag = true
			httpHost = stringify(v)

		// Elastic APM-specific tags:
		case "type":
			s.span.Type = stringify(v)

		default:
			s.span.Context.SetLabel(k, stringify(v))
		}
	}
	switch {
	case haveHTTPContext:
		if s.span.Type == "" {
			s.span.Type = "external"
			s.span.Subtype = "http"
		}
		url, err := url.Parse(httpURL)
		if err == nil {
			// handles the case where the url.Host hasn't been set.
			// Tries obtaining the host value from the "http.host" tag.
			// If not found, or if the url.Host has a value, it won't
			// mutate the existing host.
			if url.Host == "" && haveHTTPHostTag {
				url.Host = httpHost
			}
			s.span.Context.SetHTTPRequest(&http.Request{
				ProtoMinor: 1,
				ProtoMajor: 1,
				Method:     httpMethod,
				URL:        url,
			})
		}
	case haveDBContext:
		if s.span.Type == "" {
			s.span.Type = "db"
			s.span.Subtype = dbContext.Type
		}
		s.span.Context.SetDatabase(dbContext)
	}
	if s.span.Type == "" {
		s.span.Type = "custom"
		s.span.Subtype = component
	}
}