Class: Faraday::Request::Instrumentation

Inherits:
Middleware show all
Defined in:
lib/faraday/request/instrumentation.rb

Defined Under Namespace

Classes: Options

Instance Method Summary collapse

Methods inherited from Middleware

dependency, inherited, loaded?, new

Methods included from MiddlewareRegistry

#fetch_middleware, #load_middleware, #lookup_middleware, #middleware_mutex, #register_middleware

Constructor Details

#initialize(app, options = nil) ⇒ Instrumentation

Public: Instruments requests using Active Support.

Measures time spent only for synchronous requests.

Examples

ActiveSupport::Notifications.subscribe('request.faraday') do |name, starts, ends, _, env|
  url = env[:url]
  http_method = env[:method].to_s.upcase
  duration = ends - starts
  $stderr.puts '[%s] %s %s (%.3f s)' % [url.host, http_method, url.request_uri, duration]
end

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# File 'lib/faraday/request/instrumentation.rb', line 25

def initialize(app, options = nil)
  super(app)
  @name, @instrumenter = Options.from(options).values_at(:name, :instrumenter)
end

Instance Method Details

#call(env) ⇒ Object


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# File 'lib/faraday/request/instrumentation.rb', line 30

def call(env)
  @instrumenter.instrument(@name, env) do
    @app.call(env)
  end
end