Class: Isono::Models::NodeState

Inherits:
Sequel::Model
  • Object
show all
Includes:
Logger
Defined in:
lib/isono/models/node_state.rb

Instance Method Summary collapse

Methods included from Logger

included, initialize

Instance Method Details

#state_machine ⇒ Object 



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# File 'lib/isono/models/node_state.rb', line 32

def state_machine
  model = self
  st = Statemachine.build do
    startstate :init
    trans :init,    :on_ping,      :online, proc {model.last_ping_at = Time.now}
    trans :online,  :on_timeout,   :timeout
    trans :timeout, :on_ping,      :online, proc {model.last_ping_at = Time.now}
    trans :online,  :on_unmonitor, :offline
    trans :timeout, :on_unmonitor, :offline
    # do nothing on transition from and to the same state
    trans :online,  :on_ping,      :online, proc {model.last_ping_at = Time.now}
    trans :timeout, :on_timeout,   :timeout

    on_entry_of :online, proc {
      model.state = :online
    }
    on_entry_of :timeout, proc {
      model.state = :timeout
    }
    on_entry_of :offline, proc {
      model.state = :offline
    }
  end

  if self[:state]
    if st.has_state(self[:state].to_sym)
      st.state = self[:state].to_sym
    else
      raise "Unknown state: #{self[:state]}"
    end
  else
    st.reset
  end
  st
end