Class: Puppet::Transaction::EventManager

Inherits:
Object
  • Object
show all
Defined in:
lib/puppet/transaction/event_manager.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(transaction) ⇒ EventManager

Returns a new instance of EventManager.



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# File 'lib/puppet/transaction/event_manager.rb', line 6

def initialize(transaction)
  @transaction = transaction
  @event_queues = {}
  @events = []
end

Instance Attribute Details

#events ⇒ Object (readonly)

Returns the value of attribute events.



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# File 'lib/puppet/transaction/event_manager.rb', line 4

def events
  @events
end

#transaction ⇒ Object (readonly)

Returns the value of attribute transaction.



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# File 'lib/puppet/transaction/event_manager.rb', line 4

def transaction
  @transaction
end

Instance Method Details

#process_events(resource) ⇒ Object

Respond to any queued events for this resource.



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# File 'lib/puppet/transaction/event_manager.rb', line 17

def process_events(resource)
  restarted = false
  queued_events(resource) do |callback, events|
    r = process_callback(resource, callback, events)
    restarted ||= r
  end

  if restarted
    queue_events(resource, [resource.event(:name => :restarted, :status => "success")])

    transaction.resource_status(resource).restarted = true
  end
end

#queue_events(resource, events) ⇒ Object

Queue events for other resources to respond to. All of these events have to be from the same resource.



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# File 'lib/puppet/transaction/event_manager.rb', line 33

def queue_events(resource, events)
  @events += events

  # Do some basic normalization so we're not doing so many
  # graph queries for large sets of events.
  events.inject({}) do |collection, event|
    collection[event.name] ||= []
    collection[event.name] << event
    collection
  end.collect do |name, list|
    # It doesn't matter which event we use - they all have the same source
    # and name here.
    event = list[0]

    # Collect the targets of any subscriptions to those events.  We pass
    # the parent resource in so it will override the source in the events,
    # since eval_generated children can't have direct relationships.
    relationship_graph.matching_edges(event, resource).each do |edge|
      next unless method = edge.callback
      next unless edge.target.respond_to?(method)

      queue_events_for_resource(resource, edge.target, method, list)
    end

    queue_events_for_resource(resource, resource, :refresh, [event]) if resource.self_refresh? and ! resource.deleting?
  end
end

#queue_events_for_resource(source, target, callback, events) ⇒ Object 



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# File 'lib/puppet/transaction/event_manager.rb', line 61

def queue_events_for_resource(source, target, callback, events)
  source.info "Scheduling #{callback} of #{target}"

  @event_queues[target] ||= {}
  @event_queues[target][callback] ||= []
  @event_queues[target][callback] += events
end

#queued_events(resource) ⇒ Object 



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# File 'lib/puppet/transaction/event_manager.rb', line 69

def queued_events(resource)
  return unless callbacks = @event_queues[resource]
  callbacks.each do |callback, events|
    yield callback, events
  end
end

#relationship_graph ⇒ Object 



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# File 'lib/puppet/transaction/event_manager.rb', line 12

def relationship_graph
  transaction.relationship_graph
end