Module: OpenTelemetry::Instrumentation::Sinatra::Extensions::TracerExtension

Defined in:
lib/opentelemetry/instrumentation/sinatra/extensions/tracer_extension.rb

Overview

Sinatra extension that installs TracerMiddleware and provides tracing for template rendering

Class Method Summary collapse

Class Method Details

.registered(app) ⇒ Object

Sinatra hook after extension is registered



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# 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