Class: Restify::Adapter::EM::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/restify/adapter/em.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(origin) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/restify/adapter/em.rb', line 22

def initialize(origin)
  @origin   = origin
  @pipeline = true
end

Instance Attribute Details

#origin ⇒ Object (readonly)

Returns the value of attribute origin.



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# File 'lib/restify/adapter/em.rb', line 20

def origin
  @origin
end

Class Method Details

.connections ⇒ Object 



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# File 'lib/restify/adapter/em.rb', line 15

def connections
  @connections ||= {}
end

.open(uri) ⇒ Object 



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# File 'lib/restify/adapter/em.rb', line 11

def open(uri)
  connections[uri.origin] ||= new uri.origin
end

Instance Method Details

#call(request, writer, retried = false) ⇒ Object

rubocop:disable Style/IdenticalConditionalBranches



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# File 'lib/restify/adapter/em.rb', line 32

def call(request, writer, retried = false)
  if requests.empty?
    requests << [request, writer, retried]
    process_next
  else
    requests << [request, writer, retried]
  end
end

#connection ⇒ Object

rubocop:enable all



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# File 'lib/restify/adapter/em.rb', line 42

def connection
  @connection ||= EventMachine::HttpRequest.new(origin)
end

#pipeline? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/restify/adapter/em.rb', line 46

def pipeline?
  @pipeline
end

#process_next ⇒ Object

rubocop:disable Metrics/AbcSize rubocop:disable Metrics/CyclomaticComplexity rubocop:disable Metrics/MethodLength rubocop:disable Metrics/PerceivedComplexity



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# File 'lib/restify/adapter/em.rb', line 54

def process_next
  return if requests.empty?

  request, writer, retried = pipeline? ? requests.shift : requests.first
  begin
    req = connection.send request.method.downcase,
      keepalive: true,
      redirects: 3,
      path: request.uri.normalized_path,
      query: request.uri.normalized_query,
      body: request.body,
      head: request.headers
  rescue Exception => e # rubocop:disable Lint/RescueException
    writer.reject e
    requests.shift unless pipeline?
    return
  end

  req.callback do
    requests.shift unless pipeline?

    writer.fulfill Response.new(
      request,
      req.last_effective_url,
      req.response_header.status,
      req.response_header,
      req.response
    )

    if req.response_header['CONNECTION'] == 'close'
      @connection = nil
      @pipeline   = false
    end

    process_next
  end

  req.errback do
    requests.shift unless pipeline?
    @connection = nil

    if pipeline?
      EventMachine.next_tick do
        @pipeline = false
        call request, writer
      end
    elsif !retried
      EventMachine.next_tick { call request, writer }
    else
      begin
        raise "(#{req.response_header.status}) #{req.error}"
      rescue StandardError => e
        writer.reject e
      end
    end
  end
end

#requests ⇒ Object 



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# File 'lib/restify/adapter/em.rb', line 27

def requests
  @requests ||= []
end