Class: Datadog::Contrib::Sneakers::Tracer

Inherits:
Object
  • Object
show all
Defined in:
lib/ddtrace/contrib/sneakers/tracer.rb

Overview

Tracer is a Sneakers server-side middleware which traces executed jobs

Instance Method Summary collapse

Constructor Details

#initialize(app, *args) ⇒ Tracer

Returns a new instance of Tracer.



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# File 'lib/ddtrace/contrib/sneakers/tracer.rb', line 10

def initialize(app, *args)
  @app = app
  @args = args
end

Instance Method Details

#call(deserialized_msg, delivery_info, metadata, handler) ⇒ Object 



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# File 'lib/ddtrace/contrib/sneakers/tracer.rb', line 15

def call(deserialized_msg, delivery_info, metadata, handler)
  trace_options = {
    service:   configuration[:service_name],
    span_type: Datadog::Ext::AppTypes::WORKER
  }
  request_span = tracer.trace(Ext::SPAN_JOB, trace_options)

  # Set analytics sample rate
  if Datadog::Contrib::Analytics.enabled?(configuration[:analytics_enabled])
    Datadog::Contrib::Analytics.set_sample_rate(request_span, configuration[:analytics_sample_rate])
  end

  # Measure service stats
  Contrib::Analytics.set_measured(request_span)

  request_span.resource = @app.to_proc.binding.eval('self.class').to_s
  request_span.set_tag(Ext::TAG_JOB_ROUTING_KEY, delivery_info.routing_key)
  request_span.set_tag(Ext::TAG_JOB_QUEUE, delivery_info.consumer.queue.name)

  if configuration[:tag_body]
    request_span.set_tag(Ext::TAG_JOB_BODY, deserialized_msg)
  end

  @app.call(deserialized_msg, delivery_info, metadata, handler)
rescue StandardError => e
  request_span.set_error(e) unless request_span.nil?
  raise e
ensure
  request_span.finish if request_span
end