Class: OpenTelemetry::Instrumentation::Sinatra::Middlewares::TracerMiddleware

Inherits:
Object
  • Object
show all
Defined in:
lib/opentelemetry/instrumentation/sinatra/middlewares/tracer_middleware.rb

Overview

Middleware to trace Sinatra requests

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ TracerMiddleware

Returns a new instance of TracerMiddleware.



14
15
16
 
# File 'lib/opentelemetry/instrumentation/sinatra/middlewares/tracer_middleware.rb', line 14

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



18
19
20
21
22
 
# File 'lib/opentelemetry/instrumentation/sinatra/middlewares/tracer_middleware.rb', line 18

def call(env)
  response = @app.call(env)
ensure
  trace_response(env, response)
end

#trace_response(env, response) ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/opentelemetry/instrumentation/sinatra/middlewares/tracer_middleware.rb', line 24

def trace_response(env, response)
  span = OpenTelemetry::Instrumentation::Rack.current_span
  return unless span.recording?

  span.set_attribute('http.route', env['sinatra.route'].split.last) if env['sinatra.route']
  span.name = env['sinatra.route'] if env['sinatra.route']

  return if response.nil?

  sinatra_response = ::Sinatra::Response.new([], response.first)
  return unless sinatra_response.server_error?

  span.record_exception(env['sinatra.error']) if env['sinatra.error']
  span.status = OpenTelemetry::Trace::Status.error
end