goliath-sequence.rb

require 'goliath'

## OUTPUT
#
#  use Middleware
#  use Goliath::Rack::BarrierAroundwareFactory, Aroundware
#  use Goliath::Rack::BarrierAroundwareFactory, Anotherware
#
# APP:          on_headers
# APP:          on_body
# Validation:   call
# Aroundware:   pre_process
# Anotherware:  pre_process
# APP:          response
# Anotherware:  post_process
# Aroundware:   post_process
# Middleware:   post_process
# APP:          on_close
#

class Aroundware
  include Goliath::Rack::BarrierAroundware

  def pre_process
    $stdout.puts 'Aroundware: pre_process'
    return Goliath::Connection::AsyncResponse
  end

  def post_process
    $stdout.puts 'Aroundware: post_process'
    [status, headers, body]
  end
end

class Anotherware
  include Goliath::Rack::BarrierAroundware

  def pre_process
    $stdout.puts 'Anotherware: pre_process'
    return Goliath::Connection::AsyncResponse
  end

  def post_process
    $stdout.puts 'Anotherware: post_process'
    [status, headers, body]
  end
end

class Middleware
  include Goliath::Rack::AsyncMiddleware

  def post_process(env, status, headers, body)
    $stdout.puts 'Middleware: post_process'
    [status, headers, body]
  end
end

class Validation
  include Goliath::Rack::Validator

  def initialize(app)
    @app = app
  end

  def call(env)
    $stdout.puts 'Validation: call'
    @app.call(env)
  end
end

class SEQ < Goliath::API
  use Middleware
  use Validation
  use Goliath::Rack::BarrierAroundwareFactory, Aroundware
  use Goliath::Rack::BarrierAroundwareFactory, Anotherware

  def on_headers(env, headers)
    $stdout.puts 'APP: on_headers'
  end

  def on_body(env, data)
    $stdout.puts 'APP: on_body'
  end

  def on_close(env)
    $stdout.puts 'APP: on_close'
  end

  def response(env)
    $stdout.puts 'APP: response'
    [200, {}, []]
  end
end