Powershell parallel processing : How to set value in a global varible - powershell

Question

I am calling an API 500 times with 10 parallel threads as part of load testing. I want to capture the result of API call in a global variable (a counter outside script block scope) so, that I can process further for validation.
Example- In below code , I want to check if all 500 API call is success or not.
PFB code snippet-
$invokeAPI =
{
try {
$bodyContent = Get-Content $Using:inputFilepath
$Response = (Invoke-WebRequest -Method 'Post' -Uri $Using:headUri -Headers $Using:blobHeaders -Body $bodyContent).StatusCode
Write-Host -BackgroundColor Green "status Code :" $Response
}
catch [System.Exception] {
Write-Host -ForegroundColor Red "Exception caught while invoking API :" $_.ErrorDetails.Message
[int]$_.Exception.Response.StatusCode
}
}
1..500 | ForEach-Object -Parallel $invokeAPI -ThrottleLimit 10
<# ToDo...Capture API invocation Result to validate results#>

Answer 1

Updated:
Turns out I overcomplicated my initial answer by thinking jobs would be necessary. But it looks like they aren't. It appears it should be as simple as just outputting to a variable.
Sample script which will randomly test various HTTP statuses:
$invokeAPI = {
try {
$statusCode = 200,200,200,200,200,301,400,404,500 | Get-Random;
(iwr "http://httpbin.org/status/$statusCode").StatusCode;
}
catch {
[int]$_.Exception.Response.StatusCode;
};
};
$statuscodes = 1..20 | % -Parallel $invokeAPI -ThrottleLimit 5;
$statuscodes;
OLD - I thought Jobs would be needed, turns out you don't, see edit above
Change this:
1..500 | ForEach-Object -Parallel $invokeAPI -ThrottleLimit 10
To this:
$output = 1..500 | ForEach-Object -Parallel $invokeAPI -ThrottleLimit 10 -AsJob | Wait-Job | Receive-Job
$output
Explanation:
-AsJob - Causes it to run each task as a PowerShell job in the background
Wait-Job - Wait for the jobs to finish
Receive-Job - Get the return data for all the jobs
By running -AsJob, it will store the results in the background. You can then retrieve the job, which is the stored results of that jobs output.
Thanks to:
https://devblogs.microsoft.com/powershell/powershell-foreach-object-parallel-feature/
In fact, your example is very very similar to this example in the documentation:
https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/foreach-object?view=powershell-7.1#example-13--run-in-parallel-as-a-job