I'm investigating using Runspaces for parallel running. Currently, I'm trying to get back messages from whatever script I might run, to help me diagnose problems, in the same stream type from which they originate: verbose messages in the Verbose stream, etc. So far, I can get Warning and Verbose messages but whenever I try to use Write-Error (or even just access ErrorRecord object properties) the console locks up.
There's a sample at the end of this which will demonstrate what I see. Currently, the script produces four messages:
VERBOSE: This is a verbose message.
WARNING: This is a warning message.
System.Management.Automation.ErrorRecord
This is an error message.
If you uncomment any one of the comments in the $ps1.Streams.Error.add_DataAdded({}) scriptBlock it locks up at that point. Can anyone explain why and/or give me a workaround/fix?
I'm after something like this:
VERBOSE: This is a verbose message.
WARNING: This is a warning message.
C:\Work\me\PowerShell\Test-ReadPSDataStreams.ps1 : This is an error message.
At line:1 char:1
+ .\Test-ReadPSDataStreams.ps1
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException
+ FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Test-ReadPSDataStreams.ps1
This is the script:
$VerbosePreference = 'Continue'
$is1 = [InitialSessionState]::CreateDefault()
$rs1 = [RunspaceFactory]::CreateRunspace($is1)
$rs1.ApartmentState = 'STA'
$rs1.ThreadOptions = 'ReuseThread'
$rs1.Open()
$ps1 = [PowerShell]::Create()
$ps1.Runspace = $rs1
$ps1.Streams.Verbose.add_DataAdded({
Param (
[Object]$sender,
[System.Management.Automation.DataAddedEventArgs]$e
)
foreach ($item in $sender.ReadAll()) {
Write-Verbose $item.Message
}
})
$ps1.Streams.Warning.add_DataAdded({
Param (
[Object]$sender,
[System.Management.Automation.DataAddedEventArgs]$e
)
foreach ($item in $sender.ReadAll()) {
Write-Warning $item.Message
}
})
$ps1.Streams.Error.add_DataAdded({
Param (
[Object]$sender,
[System.Management.Automation.DataAddedEventArgs]$e
)
foreach ($item in $sender.ReadAll()) {
Write-Host $item.GetType()
Write-Host $item.ToString()
#Write-Host $item.ErrorDetails.Message
#Write-Error 'test'
#Write-Error $item.ToString()
}
})
[void]$ps1.AddScript({ $VerbosePreference = 'Continue' })
[void]$ps1.AddScript({ Write-Verbose 'This is a verbose message.' })
[void]$ps1.AddScript({ Write-Warning 'This is a warning message.' })
[void]$ps1.AddScript({ Write-Error 'This is an error message.' })
$ps1.Invoke()
If there's another way of doing this, I'm open to it!
See if this is something that might help:
See if this helps: http://mjolinor.wordpress.com/2014/06/03/invoke-scritptasync-v2/
If I'm reading the question correctly, it's designed for exactly the scenario you describe - testing scripts in a runspace environment and being able to write diagnostic information to the various output streams during execution, then retrieve that information after execution is finished and the runspaces disposed.