Class: LogStash::Outputs::WebSocket::Pubsub

Inherits:
Object
  • Object
show all
Defined in:
lib/logstash/outputs/websocket_topics/pubsub.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Pubsub

Returns a new instance of Pubsub.



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# File 'lib/logstash/outputs/websocket_topics/pubsub.rb', line 8

def initialize
  @subscribers = []
  @subscribers_lock = Mutex.new
end

Instance Attribute Details

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/logstash/outputs/websocket_topics/pubsub.rb', line 6

def logger
  @logger
end

Instance Method Details

#publish(object) ⇒ Object

def initialize



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# File 'lib/logstash/outputs/websocket_topics/pubsub.rb', line 13

def publish(object)
  @subscribers_lock.synchronize do
    break if @subscribers.size == 0

    failed = []
    @subscribers.each do |subscriber|
      begin
        subscriber.call(object)
      rescue => e
        @logger.error("Failed to publish to subscriber", :subscriber => subscriber, :exception => e)
        failed << subscriber
      end
    end

    failed.each do |subscriber|
      @subscribers.delete(subscriber)
    end
  end # @subscribers_lock.synchronize
end

#subscribe(&block) ⇒ Object

def Pubsub



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# File 'lib/logstash/outputs/websocket_topics/pubsub.rb', line 33

def subscribe(&block)
  queue = Queue.new
  @subscribers_lock.synchronize do
    @subscribers << proc do |event|
      queue << event
    end
  end

  while true
    block.call(queue.pop)
  end
end