Module: Capistrano::Processable

Included in:
Command, Shell, Transfer
Defined in:
lib/capistrano/processable.rb

Defined Under Namespace

Modules: SessionAssociation

Instance Method Summary collapse

Instance Method Details

#ensure_each_session ⇒ Object 



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# File 'lib/capistrano/processable.rb', line 40

def ensure_each_session
  errors = []

  sessions.each do |session|
    begin
      yield session
    rescue Exception => error
      errors << SessionAssociation.on(error, session)
    end
  end

  raise errors.first if errors.any?
  sessions
end

#process_iteration(wait = nil, &block) ⇒ Object 



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# File 'lib/capistrano/processable.rb', line 16

def process_iteration(wait=nil, &block)
  ensure_each_session { |session| session.preprocess }

  return false if block && !block.call(self)

  readers = sessions.map { |session| session.listeners.keys }.flatten.reject { |io| io.closed? }
  writers = readers.select { |io| io.respond_to?(:pending_write?) && io.pending_write? }

  if readers.any? || writers.any?
    readers, writers, = IO.select(readers, writers, nil, wait)
  else
    return false
  end

  if readers
    ensure_each_session do |session|
      ios = session.listeners.keys
      session.postprocess(ios & readers, ios & writers)
    end
  end

  true
end