Add manual instrumentation to emailservice

src/emailservice/email_server.rb

@@ -12,11 +12,39 @@
 
 post "/send_order_confirmation" do
  data = JSON.parse(request.body.read, object_class: OpenStruct)
- Pony.mail(
- to: data.email,
- from: "[email protected]",
- subject: "Your confirmation email",
- body: erb(:confirmation, locals: { order: data.order }),
- via: :logger
- )
+
+ # get the current auto-instrumented span
+ current_span = OpenTelemetry::Trace.current_span
+ current_span.add_attributes({
+ "app.order.id" => data.order.order_id,
+ "app.shipping.tracking.id" => data.order.shipping_tracking_id,
+ "app.shipping.cost.currency" => data.order.shipping_cost.currency_code,
+ "app.shipping.cost.total" => "#{data.order.shipping_cost.units}.#{data.order.shipping_cost.nanos}",
+ })
+
+ send_email(data)
+
+end
+
+error do
+ OpenTelemetry::Trace.current_span.record_exception(env['sinatra.error'])
+end
+
+def send_email(data)
+ # create and start a manual span
+ tracer = OpenTelemetry.tracer_provider.tracer('emailservice')
+ tracer.in_span("send_email") do |span|
+ Pony.mail(
+ to: data.email,
+ from: "[email protected]",
+ subject: "Your confirmation email",
+ body: erb(:confirmation, locals: { order: data.order }),
+ via: :logger
+ )
+ span.set_attribute("app.email.sent", true)
+ end
+ # manually created spans need to be ended
+ # in Ruby, the method `in_span` ends it automatically
+ # check out the OpenTelemetry Ruby docs at: 
+ # https://opentelemetry.io/docs/instrumentation/ruby/manual/#creating-new-spans 
 end