Module: ExceptionalSynchrony::CallbackExceptions

Defined in:
lib/exceptional_synchrony/callback_exceptions.rb

Defined Under Namespace

Classes: Failure

Class Method Summary collapse

Class Method Details

.ensure_callback(deferrable, &block) ⇒ Object 



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# File 'lib/exceptional_synchrony/callback_exceptions.rb', line 6

def ensure_callback(deferrable, &block)
  result = return_exception(&block)
  deferrable.succeed(*Array(result))
end

.map_deferred_result(deferrable) ⇒ Object 



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# File 'lib/exceptional_synchrony/callback_exceptions.rb', line 11

def map_deferred_result(deferrable)
  deferred_status = deferrable.instance_variable_get(:@deferred_status)
  deferred_args = deferrable.instance_variable_get(:@deferred_args)
  result = (deferred_args && deferred_args.size == 1) ? deferred_args.first : deferred_args

  case deferred_status
  when :succeeded
    if result.is_a?(Exception)
      raise result
    else
      result
    end
  when :failed
    if result.respond_to?(:error)
       handle_result_error(result)
    else
      raise_failure_for_result(result)
    end
  else
    raise ArgumentError, "No deferred status set yet: #{deferred_status.inspect} #{truncated_inspect(result)}"
  end
end

.return_exception(*args) ⇒ Object 



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# File 'lib/exceptional_synchrony/callback_exceptions.rb', line 34

def return_exception(*args)
  begin
    yield *args
  rescue Exception => ex
    ex
  end
end