Class: MessageChannel::Druby::Broker

Inherits:
Object
  • Object
show all
Defined in:
lib/message_channel/druby.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Broker

Returns a new instance of Broker.



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# File 'lib/message_channel/druby.rb', line 10

def initialize
  @mutex  =  Mutex.new
  @patterns  =  {}
end

Instance Method Details

#fetch(pattern) ⇒ Object 



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# File 'lib/message_channel/druby.rb', line 36

def fetch( pattern )
  queue  =  Queue.new
  queue_id  =  queue.object_id
  @mutex.synchronize do
    @patterns[queue_id]  =  [pattern, queue]
  end
  topic, items  =  * queue.pop
rescue
  nil
ensure
  @mutex.synchronize do
    @patterns.delete( queue_id )    rescue  nil
  end
end

#publish(topic, message) ⇒ Object 



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# File 'lib/message_channel/druby.rb', line 51

def publish( topic, message )
  @mutex.synchronize do
    @patterns.each do |_queue_id, items|
      pattern, queue  =  *items
      if File.fnmatch( pattern, topic, File::FNM_PATHNAME )
        queue.push( [topic, message] )
      end
    end
  end
end

#subscribe(pattern) ⇒ Object 



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# File 'lib/message_channel/druby.rb', line 15

def subscribe( pattern )
  queue  =  Queue.new
  queue_id  =  queue.object_id
  @mutex.synchronize do
    @patterns[queue_id]  =  [pattern, queue]
  end
  queue_id
end

#unsubscribe(queue_id) ⇒ Object 



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# File 'lib/message_channel/druby.rb', line 24

def unsubscribe( queue_id )
  @mutex.synchronize do
    @patterns.delete( queue_id )    rescue  nil
  end
rescue
  nil
end

#wait(queue_id) ⇒ Object 



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# File 'lib/message_channel/druby.rb', line 32

def wait( queue_id )
  @patterns[queue_id].last.pop
end