Class: RubyEventStore::PubSub::Broker

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_event_store/pub_sub/broker.rb

Constant Summary collapse

DEFAULT_DISPATCHER = 
Dispatcher.new

Instance Method Summary collapse

Constructor Details

#initialize(dispatcher: DEFAULT_DISPATCHER) ⇒ Broker

Returns a new instance of Broker.



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# File 'lib/ruby_event_store/pub_sub/broker.rb', line 8

def initialize(dispatcher: DEFAULT_DISPATCHER)
  @subscribers = Hash.new {|hsh, key| hsh[key] = [] }
  @global_subscribers = []

  @thread_global_subscribers = Concurrent::ThreadLocalVar.new([])
  @thread_subscribers = Concurrent::ThreadLocalVar.new do
    Hash.new {|hsh, key| hsh[key] = [] }
  end

  @dispatcher = dispatcher
end

Instance Method Details

#add_global_subscriber(subscriber) ⇒ Object 



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# File 'lib/ruby_event_store/pub_sub/broker.rb', line 25

def add_global_subscriber(subscriber)
  verify_subscriber(subscriber)
  @global_subscribers << subscriber

  ->() { @global_subscribers.delete(subscriber) }
end

#add_subscriber(subscriber, event_types) ⇒ Object 



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# File 'lib/ruby_event_store/pub_sub/broker.rb', line 20

def add_subscriber(subscriber, event_types)
  verify_subscriber(subscriber)
  subscribe(subscriber, event_types)
end

#add_thread_global_subscriber(subscriber) ⇒ Object 



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# File 'lib/ruby_event_store/pub_sub/broker.rb', line 32

def add_thread_global_subscriber(subscriber)
  verify_subscriber(subscriber)
  @thread_global_subscribers.value += [subscriber]

  ->() { @thread_global_subscribers.value -= [subscriber] }
end

#add_thread_subscriber(subscriber, event_types) ⇒ Object 



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# File 'lib/ruby_event_store/pub_sub/broker.rb', line 39

def add_thread_subscriber(subscriber, event_types)
  verify_subscriber(subscriber)
  event_types.each{ |type| @thread_subscribers.value[type.name] << subscriber }
  ->() {event_types.each{ |type| @thread_subscribers.value.fetch(type.name).delete(subscriber) } }
end

#notify_subscribers(event) ⇒ Object 



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# File 'lib/ruby_event_store/pub_sub/broker.rb', line 45

def notify_subscribers(event)
  all_subscribers_for(event.class).each do |subscriber|
    @dispatcher.call(subscriber, event)
  end
end