Class: Superbolt::Queue

Inherits:
Object
  • Object
show all
Defined in:
lib/superbolt/queue.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, config = nil) ⇒ Queue

Returns a new instance of Queue.



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# File 'lib/superbolt/queue.rb', line 5

def initialize(name, config=nil)
  @name = name
  @config = config || Superbolt.config
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/superbolt/queue.rb', line 3

def config
  @config
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/superbolt/queue.rb', line 3

def name
  @name
end

Instance Method Details

#all ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 49

def all
  read.map(&:parse)
end

#clear ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 30

def clear
  closing do
    q.purge
  end
end

#connection ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 10

def connection
  @connection ||= Connection::Queue.new(name, config)
end

#delete ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 71

def delete
  messages = []
  closing do
    q.subscribe(:ack => true) do |delivery_info, metadata, payload|
      message = IncomingMessage.new(delivery_info, payload, channel)
      relevant = yield(message.parse)
      if relevant
        messages << message.parse
        message.ack
      end
    end

    # channel is closed by block before message ack can complete
    # therefore we must sleep :(
    sleep 0.02
  end
  messages
end

#peek ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 53

def peek
  message = pop
  push(message)
  message
end

#pop ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 59

def pop
  closing do
    q.pop do |delivery_info, metadata, message|
      message = IncomingMessage.new(delivery_info, message, channel)
      message && message.parse
    end
  end
end

#push(message) ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 18

def push(message)
  closing do
    writer.publish(message.to_json, routing_key: name)
  end
end

#read ⇒ Object

TODO: roll up some of these subscribe methods



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# File 'lib/superbolt/queue.rb', line 38

def read
  messages = []
  closing do
    q.subscribe(:ack => true) do |delivery_info, metadata, payload|
      message = IncomingMessage.new(delivery_info, payload, channel)
      messages << message
    end
  end
  messages
end

#size ⇒ Object 



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# File 'lib/superbolt/queue.rb', line 24

def size
  closing do
    q.message_count
  end
end