Class: Ribbon::EventBus::Subscription

Inherits:
Object
  • Object
show all
Includes:
Mixins::HasConfig, Mixins::HasInstance, Mixins::Serializable
Defined in:
lib/ribbon/event_bus/subscription.rb

Constant Summary

Constants included from Mixins::Serializable

Mixins::Serializable::MAGIC, Mixins::Serializable::VERSION

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Mixins::Serializable

#_serializable_args, #_serializable_package, #_serialize_arg, included, #serialize

Methods included from Mixins::HasConfig

#_has_config_config, #_has_config_load_config, #config, included

Methods included from Mixins::HasInstance

#instance, #plugins

Constructor Details

#initialize(event_name, params = {}, &block) ⇒ Subscription

Returns a new instance of Subscription.



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# File 'lib/ribbon/event_bus/subscription.rb', line 17

def initialize(event_name, params={}, &block)
  @event_name = event_name.to_sym
  @_block = block

  _evaluate_params(params)

  @identifier = _generate_identifier

  if instance.find_subscription(identifier)
    raise Errors::DuplicateIdentifierError, "give this subscription a unique name"
  else
    instance._register_subscription(self)
  end
end

Instance Attribute Details

#event_name ⇒ Object (readonly)

Returns the value of attribute event_name.



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# File 'lib/ribbon/event_bus/subscription.rb', line 13

def event_name
  @event_name
end

#identifier ⇒ Object (readonly)

Returns the value of attribute identifier.



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# File 'lib/ribbon/event_bus/subscription.rb', line 15

def identifier
  @identifier
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/ribbon/event_bus/subscription.rb', line 12

def name
  @name
end

#priority ⇒ Object (readonly)

Returns the value of attribute priority.



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# File 'lib/ribbon/event_bus/subscription.rb', line 14

def priority
  @priority
end

Class Method Details

.load_from_serialized(instance, identifier) ⇒ Object 



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# File 'lib/ribbon/event_bus/subscription.rb', line 32

def self.load_from_serialized(instance, identifier)
  instance.find_subscription(identifier)
end

Instance Method Details

#handle(event) ⇒ Object

Raises:



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# File 'lib/ribbon/event_bus/subscription.rb', line 36

def handle(event)
  raise Errors::UnexpectedEventError, 'wrong name' unless event.name == event_name
  raise Errors::UnexpectedEventError, 'wrong instance' unless event.instance == instance

  plugins.perform(:subscription, self, event) { |subscription, event|
    @_block.call(event)
  }
end

#to_s ⇒ Object 



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# File 'lib/ribbon/event_bus/subscription.rb', line 45

def to_s
  "Subscription(on #{event_name}: #{name || _path})"
end