Class: Agent::Pop

Inherits:
Object
  • Object
show all
Defined in:
lib/agent/pop.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Pop

Returns a new instance of Pop.



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# File 'lib/agent/pop.rb', line 7

def initialize(options={})
  @object        = nil
  @uuid          = options[:uuid] || UUID.generate
  @blocking_once = options[:blocking_once]
  @notifier      = options[:notifier]
  @mutex         = Mutex.new
  @cvar          = ConditionVariable.new
  @received      = false
  @closed        = false
end

Instance Attribute Details

#blocking_once ⇒ Object (readonly)

Returns the value of attribute blocking_once.



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# File 'lib/agent/pop.rb', line 5

def blocking_once
  @blocking_once
end

#notifier ⇒ Object (readonly)

Returns the value of attribute notifier.



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# File 'lib/agent/pop.rb', line 5

def notifier
  @notifier
end

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/agent/pop.rb', line 5

def object
  @object
end

#uuid ⇒ Object (readonly)

Returns the value of attribute uuid.



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# File 'lib/agent/pop.rb', line 5

def uuid
  @uuid
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/agent/pop.rb', line 59

def close
  @mutex.synchronize do
    return if @received
    @closed = true
    @cvar.broadcast
    @notifier.notify(self) if @notifier
  end
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent/pop.rb', line 22

def closed?
  @closed
end

#received? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent/pop.rb', line 18

def received?
  @received
end

#send ⇒ Object 



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# File 'lib/agent/pop.rb', line 36

def send
  @mutex.synchronize do
    if @blocking_once
      _, error = @blocking_once.perform do
        @object = yield unless @closed
        @received = true
        @cvar.signal
        @notifier.notify(self) if @notifier
      end

      return error
    else
      begin
        @object = yield unless @closed
        @received = true
        @cvar.signal
        @notifier.notify(self) if @notifier
      rescue Errors::Rollback
      end
    end
  end
end

#wait ⇒ Object 



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# File 'lib/agent/pop.rb', line 26

def wait
  @mutex.synchronize do
    until @received || @closed
      @cvar.wait(@mutex)
    end
    return false if @closed
    received?
  end
end