CODEWITHSUNDEEP
powershell
Balthazar
Balthazar

Reputation: 493

PowerShell Runspaces, outputs and variables

I'm trying to understand Runspaces in PowerShell. I know about the PoshRSJob-Module, but I'd like to create my Runspace Jobs by myself.

This is my code, mostly taken out from this blog:

$Computer = "somename"
[runspacefactory]::CreateRunspacePool() > $null
$SessionState = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault()
$RunspacePool = [runspacefactory]::CreateRunspacePool(1,5)
$RunspacePool.Open()
1..2 | % {
    $PowerShell = [powershell]::Create()
    $PowerShell.RunspacePool = $RunspacePool
    $PowerShell.AddScript({
        param(
            $Computer
        )
        $Computer
    }) > $null
    $PowerShell.AddParameter($Computer)
    $Invoke = $PowerShell.BeginInvoke()
    while (!($Invoke.IsCompleted)) {sleep -Milliseconds 2}
    $Data = $PowerShell.EndInvoke($Invoke)
    Write-Host $Data -f Red
}

Three question are in my mind:

Commands : System.Management.Automation.PSCommand Streams : System.Management.Automation.PSDataStreams InstanceId : 3b91cfda-028e-4cec-9b6d-55bded5d9d3c InvocationStateInfo : System.Management.Automation.PSInvocationStateInfo IsNested : False HadErrors : False Runspace : RunspacePool : System.Management.Automation.Runspaces.RunspacePool IsRunspaceOwner : False HistoryString :

Upvotes: 1

Views: 2642

Answers (1)

briantist
briantist

Reputation: 47792

I don't understand your first question.

For the second question, I think it's because you're using $PowerShell.AddParameter($Computer).

Try $PowerShell.AddArgument($Computer) instead. AddArgument is for adding a value that gets implicitly (positionally) bound to a parameter. AddParameter is for adding a named parameter. The overload of AddParameter that takes just a string is for [Switch] parameters.

For your third question, I think it's $RunspacePool.Open() that's giving you that output.

When trying to determine these things, look for lines, especially with method calls, that have no left-hand assignment; so things you aren't assigning to a variable, as that's generally how these values get put into the output stream.

Upvotes: 1

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