Class: Celluloid::Actor::System

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/celluloid/actor/system.rb

Constant Summary collapse

ROOT_SERVICES = 
[
  {
    as: :notifications_fanout,
    type: Celluloid::Notifications::Fanout
  },
  {
    as: :public_services,
    type: Celluloid::Supervision::Service::Public,
    accessors: [:services],
    supervise: []
  }
].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ System

Returns a new instance of System.

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# File 'lib/celluloid/actor/system.rb', line 35

def initialize
  @tree = nil
  @group = Celluloid.group_class.new
  @registry = Internals::Registry.new
  @root = ROOT_SERVICES
end

Instance Attribute Details

#group ⇒ Object (readonly)

Returns the value of attribute group.


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# File 'lib/celluloid/actor/system.rb', line 23

def group
  @group
end

#registry ⇒ Object (readonly)

Returns the value of attribute registry.


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# File 'lib/celluloid/actor/system.rb', line 23

def registry
  @registry
end

Instance Method Details

#assert_inactive ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 138

def assert_inactive
  @group.assert_inactive
end

#clear_registry ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 78

def clear_registry
  @registry.clear
end

#get_thread ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 59

def get_thread
  @group.get do
    Thread.current[:celluloid_actor_system] = self
    yield
  end
end

#registered ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 74

def registered
  @registry.names
end

#root_configuration ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 31

def root_configuration
  @root
end

#root_services ⇒ Object

the root of the supervisor tree is established at supervision/root

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# File 'lib/celluloid/actor/system.rb', line 27

def root_services
  @tree
end

#running ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 82

def running
  actors = []
  @group.each do |t|
    next unless t.role == :actor
    actor = t.actor

    # NOTE - these are in separate statements, since on JRuby t.actor may
    # become nil befor .behavior_proxy() is called
    next unless actor
    next unless actor.respond_to?(:behavior_proxy)
    proxy = actor.behavior_proxy
    actors << proxy
  end
  actors
end

#running? ⇒ Boolean

Returns:

  • (Boolean)
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# File 'lib/celluloid/actor/system.rb', line 98

def running?
  @group.active?
end

#shutdown ⇒ Object

Shut down all running actors

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# File 'lib/celluloid/actor/system.rb', line 103

def shutdown
  actors = running
  Timeout.timeout(shutdown_timeout) do
    Internals::Logger.debug "Terminating #{actors.size} #{actors.size > 1 ? 'actors' : 'actor'}..." unless actors.empty?

    # Actors cannot self-terminate, you must do it for them
    actors.each do |actor|
      begin
        actor.terminate!
      rescue DeadActorError
      end
    end

    actors.each do |actor|
      begin
        Actor.join(actor)
      rescue DeadActorError
      end
    end
  end
rescue Timeout::Error
  Internals::Logger.error("Couldn't cleanly terminate all actors in #{shutdown_timeout} seconds!")
  unless RUBY_PLATFORM == "java" || RUBY_ENGINE == "rbx"
    actors.each do |actor|
      begin
        Actor.kill(actor)
      rescue DeadActorError, MailboxDead
      end
    end
  end
ensure
  @group.shutdown
  clear_registry
end

#shutdown_timeout ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 142

def shutdown_timeout
  Celluloid.shutdown_timeout
end

#stack_dump ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 66

def stack_dump
  Internals::Stack::Dump.new(@group)
end

#stack_summary ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 70

def stack_summary
  Internals::Stack::Summary.new(@group)
end

#start ⇒ Object

Launch default services

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# File 'lib/celluloid/actor/system.rb', line 43

def start
  within do
    @root = Supervision::Service::Root.define
    @tree = root_configuration.deploy
  end
  true
end

#within ⇒ Object

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# File 'lib/celluloid/actor/system.rb', line 51

def within
  old = Thread.current[:celluloid_actor_system]
  Thread.current[:celluloid_actor_system] = self
  yield
ensure
  Thread.current[:celluloid_actor_system] = old
end