Class: Datadog::Tracing::Contrib::HTTPX::Plugin::RequestTracer

Inherits:
Object
  • Object
show all
Includes:
Contrib::HttpAnnotationHelper
Defined in:
lib/httpx/adapters/datadog.rb

Constant Summary collapse

SPAN_REQUEST = 
"httpx.request"

Instance Method Summary collapse

Constructor Details

#initialize(request) ⇒ RequestTracer

initializes the tracer object on the request.



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# File 'lib/httpx/adapters/datadog.rb', line 39

def initialize(request)
  @request = request
  @start_time = nil

  # request objects are reused, when already buffered requests get rerouted to a different
  # connection due to connection issues, or when they already got a response, but need to
  # be retried. In such situations, the original span needs to be extended for the former,
  # while a new is required for the latter.
  request.on(:idle) { reset }
  # the span is initialized when the request is buffered in the parser, which is the closest
  # one gets to actually sending the request.
  request.on(:headers) { call }
end

Instance Method Details

#call(*args) ⇒ Object

sets up the span start time, while preparing the on response callback.



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# File 'lib/httpx/adapters/datadog.rb', line 54

def call(*args)
  return if @start_time

  start(*args)

  @request.once(:response, &method(:finish))
end