Class: Mnemosyne::Probes::Faraday::Base::Probe::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/mnemosyne/probes/faraday/base.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/mnemosyne/probes/faraday/base.rb', line 18

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/mnemosyne/probes/faraday/base.rb', line 22

def call(env)
  trace = ::Mnemosyne::Instrumenter.current_trace

  return @app.call(env) unless trace

  span = ::Mnemosyne::Span.new 'external.http.faraday', \
    meta: {url: env[:url].to_s, method: env[:method]}

  span.start!

  env[:request_headers].merge!({
    'X-Mnemosyne-Transaction' => trace.transaction,
    'X-Mnemosyne-Origin' => span.uuid,
  }.reject {|_, v| v.nil? })

  @app.call(env).on_complete do |env|
    span.meta[:status] = env[:status]

    trace << span.finish!
  end
end