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36 package gr.grnet.aquarium.computation
40 import gr.grnet.aquarium.event.model.resource.ResourceEventModel
43 * Keeps the latest resource event per resource instance.
46 * @author Christos KK Loverdos <loverdos@gmail.com>
49 case class LatestResourceEventsSnapshot(resourceEvents: List[ResourceEventModel]) {
52 * The gateway to playing with mutable state.
54 * @return A fresh instance of [[gr.grnet.aquarium.computation.state.parts.LatestResourceEventsWorker]].
56 def toMutableWorker = {
57 val map = scala.collection.mutable.Map[ResourceEventModel.FullResourceType, ResourceEventModel]()
58 for(latestEvent <- resourceEvents) {
59 map(latestEvent.fullResourceInfo) = latestEvent
61 LatestResourceEventsWorker(map)
64 def findTheLatest: Option[ResourceEventModel] = {
65 resourceEvents.sortWith {
66 case (ev1, ev2) ⇒ ev1.occurredMillis <= ev2.occurredMillis
70 def findTheLatestID = {
71 findTheLatest.map(_.id)
75 object LatestResourceEventsSnapshot {
76 final val Empty = LatestResourceEventsSnapshot(Nil)