Class: TCellAgent::BoundedQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/tcell_agent/utils/queue_with_timeout.rb

Instance Method Summary collapse

Constructor Details

#initialize(max_size = :infinite) ⇒ BoundedQueue 



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# File 'lib/tcell_agent/utils/queue_with_timeout.rb', line 11

def initialize(max_size = :infinite)
  @lock  = Mutex.new
  @items = []
  @item_available = ConditionVariable.new
  @max_size = max_size
  @space_available = ConditionVariable.new
end

Instance Method Details

#full? ⇒ Boolean 



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# File 'lib/tcell_agent/utils/queue_with_timeout.rb', line 50

def full?
  return false if @max_size == :infinite
  @max_size <= @items.size
end

#pop(timeout = :never, &timeout_policy) ⇒ Object 



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# File 'lib/tcell_agent/utils/queue_with_timeout.rb', line 35

def pop(timeout = :never, &timeout_policy)
  timeout_policy ||= ->{nil}
  wait_for_condition(
    @item_available,
    ->{@items.any?},
    timeout,
    timeout_policy) do

    item = @items.shift
    @space_available.signal

    item
  end
end

#push(obj, timeout = :never, &timeout_policy) ⇒ Object 



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# File 'lib/tcell_agent/utils/queue_with_timeout.rb', line 19

def push(obj, timeout=:never, &timeout_policy)
  timeout_policy ||= -> do
    raise "Push timed out"
  end

  wait_for_condition(
    @space_available,
    ->{!full?},
    timeout,
    timeout_policy) do

    @items.push(obj)
    @item_available.signal
  end
end

#size ⇒ Object 



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# File 'lib/tcell_agent/utils/queue_with_timeout.rb', line 55

def size
  @items.size
end