PowerShell: Console-related

powershell_console.ps1

#Requires -Version 5.1
# Reference: 1) https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.runspaces.runspace?view=powershellsdk-1.1.0
# Reference: 2) https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.powershell?view=powershellsdk-1.1.0
# Reference: 3) https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/write-progress?view=powershell-5.1
# Reference: 4) https://learn.microsoft.com/en-us/dotnet/api/system.collections.arraylist?view=netframework-4.8.1

# Example 1: Continuously watch Windows diagnostic counters in console progress bar
$Counters = @(  # Windows diagnostic counter(s)
    "\Processor(_total)\% Processor Time"
    "\Memory\% Committed Bytes In Use"
)
$Interval = 3  # Interval for refreshing counter(s)

$RunspacePool =  [RunspaceFactory]::CreateRunspacePool(1, [Environment]::ProcessorCount/2)
$RunspacePool.Open()
try {
    $Jobs = [Collections.ArrayList]@()
    for ($i=0; $i -lt $Counters.Length; $i++) {
        $ScriptBlock = [ScriptBlock]::Create("Get-Counter -Counter '$($Counters[$i])'")
        $PowerShell = [PowerShell]::Create()
        [void]$PowerShell.AddScript($ScriptBlock)
        [void]$Jobs.Add([PSCustomObject]@{
            "AsyncResult" = $PowerShell.BeginInvoke()
            "PowerShell" = $PowerShell
        })
    }
    while ($true) {
        while ($Jobs.AsyncResult.IsCompleted -contains $false) {
            Start-Sleep -Milliseconds 100
        }
        for ($i=0; $i -lt $Counters.Length; $i++) {  
            $Counter = $Jobs[$i].PowerShell.EndInvoke($Jobs[$i].AsyncResult)
            $ProgressArgs = @{
                "Activity" = $Counter.CounterSamples.Path
                "Status" = "$($Counter.TimeStamp) : $($Counter.CounterSamples.CookedValue)"
                "Id" = $i + 1
                "CurrentOperation" = " "
                "ParentId" = 0
            }
            Write-Progress @ProgressArgs
        }
        Start-Sleep -Milliseconds ($Interval * 1000 - 500)
        for ($i=0; $i -lt $Counters.Length; $i++) {  
            $Jobs[$i].AsyncResult = $Jobs[$i].PowerShell.BeginInvoke()
        }
    }
} finally {
    $Jobs | ForEach-Object { $_.PowerShell.Dispose() }
    $RunspacePool.Dispose()
}