2011-12-15 18:19:40 +01:00
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/**
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* Copyright (C) 2009-2011 Typesafe Inc. <http://www.typesafe.com>
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*/
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2011-12-15 15:28:21 +01:00
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package akka.docs.routing
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import akka.actor.ActorRef
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//#boundedCapacitor
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trait BoundedCapacitor {
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def lowerBound: Int
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def upperBound: Int
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def capacity(delegates: Seq[ActorRef]): Int = {
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val current = delegates length
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var delta = _eval(delegates)
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val proposed = current + delta
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if (proposed < lowerBound) delta += (lowerBound - proposed)
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else if (proposed > upperBound) delta -= (proposed - upperBound)
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delta
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}
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protected def _eval(delegates: Seq[ActorRef]): Int
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}
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//#boundedCapacitor
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