Cancels a whole process instance.

  pdef = Ruote.process_definition :name => 'test' do
    sequence do
      participant :ref => 'editor'
      concurrence do
        participant :ref => 'reviewer1'
        participant :ref => 'reviewer2'
        sequence do
          participant :ref => 'main_reviewer'
          cancel_process :if => '${f:over} == true'
        end
      end
      participant :ref => 'editor'
    end
  end

This example has a ‘main_reviewer’ with the ability to cancel the whole process, if he sets the workitem field ‘over’ to ‘true’.

If the goal is to cancel only a segment of a process instance, the expression ‘undo’ (Ruote::Exp::UndoExpression) is better suited.

‘terminate‘

Sometimes ‘terminate’ reads better than ‘cancel_process‘

  Ruote.process_definition do
    alice :task => 'do this'
    terminate :if => '${no_need_for_bob}'
    bob :task => 'do that'
    charly :task => 'just do it'
  end