pstools.queue

1.3

private/class.extendedqueue.ps1

                                class ExtendedQueue {

    [System.Collections.Queue]$Queue

    [system.collections.Generic.Queue[pscustomobject]]$LastOperations

    [int64]$TotalItemsAdded

    [int64]$TotalItemsRemoved

    [double]$AddPerSec

    [double]$RemovePerSec

    [double]$Velocity

    [int]$PerformanceHistory

    [void]AddQueueItem (

        $Item

    ) {

        $this.Queue.Enqueue($item)

        $this.LastOperations.Enqueue(([pscustomobject]@{Type = 'Add'; TimeStamp = ([datetime]::Now) }))

        $this.TotalItemsAdded++

        $this.CalculateSpeed()

    }

    [psobject]GetNextQueueItem() {

        try {

            $ReturnObject = $this.Queue.Dequeue()

            $this.LastOperations.Enqueue(([pscustomobject]@{Type = 'Remove'; TimeStamp = ([datetime]::Now) }))

            $this.TotalItemsRemoved++

        } catch {

            $ReturnObject = $null

        }

        $this.CalculateSpeed()

        return $ReturnObject

    }

    [psobject]ShowNextQueueItem() {

        return $this.Queue.Peek()

    }

    [int64]GetQueueCount() {

        return $this.Queue.Count

    }

    [void]ClearAllQueueItems() {

        $this.Queue.Clear()

    }

    [array]GetAllQueueItems() {

        $Result = while ($this.GetQueueCount()) {

            $this.GetNextQueueItem()

            $this.TotalItemsRemoved++

        }

        $this.CalculateSpeed()

        return $Result

    }

    [void]RotateLastOperations ($CurrentTime) {

        while ($this.LastOperations.Count -ge $this.PerformanceHistory) {

            $null = $this.LastOperations.Dequeue()

        }

    }

    [void]CalculateSpeed () {

        $CurrentTime = [datetime]::Now

        $this.RotateLastOperations($CurrentTime)

        $ItemsAdded = $this.LastOperations.Where( { $PSItem.Type -eq 'Add' }).Count

        $ItemsRemoved = $this.LastOperations.Where( { $PSItem.Type -eq 'Remove' }).Count

        try {

            $this.AddPerSec = $ItemsAdded / ($CurrentTime - $this.LastOperations.Where( { $PSItem.Type -eq 'Add' })[0].TimeStamp).TotalSeconds

        } catch {

            $this.AddPerSec = 0

        }

        try {

            $this.RemovePerSec = $ItemsRemoved / ($CurrentTime - $this.LastOperations.Where( { $PSItem.Type -eq 'Remove' })[0].TimeStamp).TotalSeconds

        } catch {

            $this.RemovePerSec = 0

        }

        $this.Velocity = $this.AddPerSec - $this.RemovePerSec

    }

    ExtendedQueue () {

        $this.Queue = [System.Collections.Queue]::New()

        $this.LastOperations = [system.collections.Generic.Queue[pscustomobject]]::New()

        $this.TotalItemsAdded = 0

        $this.TotalItemsRemoved = 0

        $this.AddPerSec = 0

        $this.RemovePerSec = 0

        $this.PerformanceHistory = 50

    }

}

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