module OpenTelemetry::Instrumentation::Sinatra::Extensions::TracerExtension

Sinatra extension that installs TracerMiddleware and provides tracing for template rendering

Public Class Methods

registered(app) click to toggle source

Sinatra hook after extension is registered

# File lib/opentelemetry/instrumentation/sinatra/extensions/tracer_extension.rb, line 17
def self.registered(app)
  # Create tracing `render` method
  ::Sinatra::Base.module_eval do
    def render(_engine, data, *)
      template_name = data.is_a?(Symbol) ? data : :literal

      Sinatra::Instrumentation.instance.tracer.in_span(
        'sinatra.render_template',
        attributes: { 'sinatra.template_name' => template_name.to_s }
      ) do
        super
      end
    end
  end

  app.use Middlewares::TracerMiddleware
end

Public Instance Methods

render(_engine, data, *) click to toggle source
Calls superclass method
# File lib/opentelemetry/instrumentation/sinatra/extensions/tracer_extension.rb, line 20
def render(_engine, data, *)
  template_name = data.is_a?(Symbol) ? data : :literal

  Sinatra::Instrumentation.instance.tracer.in_span(
    'sinatra.render_template',
    attributes: { 'sinatra.template_name' => template_name.to_s }
  ) do
    super
  end
end