Send messages to active connections on Horizons using PowerCLI

[JGITTRALEE]

Hi All,
I am trying to script a warning message to active users in a pool before it gets powered down for Maintenance.
I cant get the messages to appear on the client side, I think its something to do with the sessionid below not having the right info but I can't seem to figure it out.

I would be extremely grateful for any help

$credential = Import-CliXml -Path 'C:\Scripts\cred.xml'$hvServices = Connect-HVServer localhost -Credential $credential
$hvservice=$hvServer.ExtensionData
$sessions=get-hvlocalsession
$Poolname="PoolNameHere"
$WaitTime=1800

#Disable the Pool and prevent more connections before Maintenance
Set-HVPool -PoolName $Poolname -Disable
Write-Host "New connections to $Poolname disabled"

#Notify current users about maintenance

foreach ($session in $sessions){

if($session.DesktopName -eq "$Poolname"){

$sessionId = $session.Id
Write-Host "Connection to $Poolname found: " $session.username
$hvservice.session.Session_SendMessage($sessionid,"INFO","Test")

}

}

[LucD]

Did you try disabling the pool after you send the message?

[JGITTRALEE]

Thanks for the reply,
Ive tried commenting out all the commands for Disabling/Enabling the pools and just letting the foreach loop run but it still wont generate the mesage on the target client for me!

[JGITTRALEE]

If I was to change my approach and populate the get-HVlocalsession with a where clause that we would only populate the array with results that were in a specific pool, Any idea how would I select the proper field to allow the Sendmessages command to work?

$Poolname="PoolNameHere"

$sessions=get-HVlocalsession | 

Where{$session.DesktopName -eq "$Poolname"

Select????}

$services1.session.Session_SendMessages($sessions.id,"Warning","Test")

[JGITTRALEE]

If I was to change my approach and populate the get-HVlocalsession with a where clause that we would only populate the array with results that were in a specific pool, Any idea how would I select the proper field to allow the Sendmessages command to work?

$Poolname="PoolNameHere"

$sessions=get-HVlocalsession | 

Where{$session.DesktopName -eq "$Poolname"

Select????}

$services1.session.Session_SendMessages($sessions.id,"Warning","Test")

[Magneet]

Why do you loop trough the sessions while you can just build a search to get all the sessions in the pool and send the same message at the same time? 

https://www.retouw.nl/2018/10/30/sending-messages-to-users-with-the-horizon-apis/

$services1.session.Session_SendMessages($sessions.id,"ERROR","This is a test message with multiple recipients for retouw.nl at 30-10-2018 19:25h")

 yes this uses get-hvlocalsession but you could use a query as well that only looks for sessions in a single pool.

[JGITTRALEE]

Thanks for the reply, I have tried both ways but it always seems to come back with the same error!

It looks like the array is empty but when I look at $sesions it has entries!
Sorry if I am missing something this is all very new to me 🙂

#Commands I run

$HVserver=Connect-HVServer -Server........(Server Connection Details)
$hvservices=$HVServer.ExtensionData
$sessions=get-HVlocalsession
$hvservices.session.Session_SendMessages($sessions.id,"Info","PLEASE NOTE")

#Error it produces
You cannot call a method on a null-valued expression.
At line:2 char:1
+ $hvservices.session.Session_SendMessages($sessions.id,"Info","PLEASE ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull

#Confirming the array is populated
PS C:\Windows\system32> $sessions

Id NamesData ReferenceData SessionData
-- --------- ------------- -----------
VMware.Hv.SessionId VMware.Hv.SessionNamesData VMware.Hv.SessionLocalReferenceData VMware.Hv.SessionData
VMware.Hv.SessionId VMware.Hv.SessionNamesData VMware.Hv.SessionLocalReferenceData VMware.Hv.SessionData

[Magneet]

did you also try it with the info in all caps so INFO ? From what I remember that was required