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36 package gr.grnet.aquarium.logic.accounting.algorithm
39 import com.ckkloverdos.maybe.Maybe
40 import gr.grnet.aquarium.logic.accounting.dsl._
41 import gr.grnet.aquarium.AquariumException
42 import gr.grnet.aquarium.charging.{CurrentValueInput, TimeDeltaInput, OldTotalAmountInput, UnitPriceInput, ChargingBehaviorNames, ChargingBehaviorNameInput, ChargingInput}
45 * An executable charging algorithm with some simple implementation.
47 * @author Christos KK Loverdos <loverdos@gmail.com>
49 object SimpleExecutableChargingBehaviorAlgorithm extends ExecutableChargingBehaviorAlgorithm {
52 def hrs(millis: Double) = millis / 1000 / 60 / 60
54 def apply(vars: Map[ChargingInput, Any]): Double = {
55 vars.apply(ChargingBehaviorNameInput) match {
56 case ChargingBehaviorNames.continuous ⇒
57 val unitPrice = vars(UnitPriceInput).asInstanceOf[Double]
58 val oldTotalAmount = vars(OldTotalAmountInput).asInstanceOf[Double]
59 val timeDelta = vars(TimeDeltaInput).asInstanceOf[Double]
61 hrs(timeDelta) * oldTotalAmount * unitPrice
63 case ChargingBehaviorNames.discrete ⇒
64 val unitPrice = vars(UnitPriceInput).asInstanceOf[Double]
65 val currentValue = vars(CurrentValueInput).asInstanceOf[Double]
67 currentValue * unitPrice
69 case ChargingBehaviorNames.onoff ⇒
70 val unitPrice = vars(UnitPriceInput).asInstanceOf[Double]
71 val timeDelta = vars(TimeDeltaInput).asInstanceOf[Double]
73 hrs(timeDelta) * unitPrice
75 case ChargingBehaviorNames.once ⇒
76 val currentValue = vars(CurrentValueInput).asInstanceOf[Double]
80 throw new AquariumException("Unknown cost policy %s".format(name))
84 override def toString = "SimpleExecutableCostPolicyAlgorithm(%s)".format(
86 ChargingBehaviorNames.continuous -> "hrs(timeDelta) * oldTotalAmount * unitPrice",
87 ChargingBehaviorNames.discrete -> "currentValue * unitPrice",
88 ChargingBehaviorNames.onoff -> "hrs(timeDelta) * unitPrice",
89 ChargingBehaviorNames.once -> "currentValue"))