Class: HubStep::Faraday::Middleware

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/hubstep/faraday/middleware.rb

Overview

Faraday middleware for wrapping a request in a span.

tracer = HubStep::Tracer.new Faraday.new do |b|

b.request(:hubstep, tracer)
b.adapter(:typhoeus)

end

Class Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, tracer, include_urls: false) ⇒ Middleware

Create a Middleware

tracer - a HubStep::Tracer instance include_urls - Boolean specifying whether the ‘http.url` tag should be

added to the spans this middleware creates. URLs can
contain sensitive information, so they are omitted by
default.



42
43
44
45
46
 
# File 'lib/hubstep/faraday/middleware.rb', line 42

def initialize(app, tracer, include_urls: false)
  super(app)
  @tracer = tracer
  @include_urls = include_urls
end

Class Attribute Details

.uri_parser ⇒ Object

Get the URI parser.



29
30
31
 
# File 'lib/hubstep/faraday/middleware.rb', line 29

def uri_parser
  @uri_parser
end

Instance Method Details

#call(request_env) ⇒ Object 



48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/hubstep/faraday/middleware.rb', line 48

def call(request_env)
  # We pass `finish: false` so that the span won't have its end time
  # recorded until #on_complete runs (which could be after #call returns
  # if the request is asynchronous).
  @tracer.span("faraday", finish: false) do |span|
    begin
      span.configure { record_request(span, request_env) }
      @app.call(request_env).on_complete do |response_env|
        span.configure do
          record_response(span, response_env)
          span.finish if span.end_micros.nil?
        end
      end
    ensure
      span.configure { record_exception(span, $ERROR_INFO) }
    end
  end
end