PSFramework

1.13.426

internal/scripts/taskEngine.ps1

$scriptBlock = {
    $script:___ScriptName = 'psframework.taskengine'
    
    try {
        #region Main Execution
        while ($true) {
            # This portion is critical to gracefully closing the script
            if ([PSFramework.Runspace.RunspaceHost]::Runspaces[$___ScriptName].State -notlike "Running") {
                break
            }
            
            $task = $null
            $tasksDone = @()
            while ($task = [PSFramework.TaskEngine.TaskHost]::GetNextTask($tasksDone)) {
                $task.State = 'Running'
                try {
                    [PSFramework.Utility.UtilityHost]::ImportScriptBlock($task.ScriptBlock)
                    if ($null -ne $task.ArgumentList) { $task.ScriptBlock.Invoke($task.ArgumentList) }
                    else { $task.ScriptBlock.Invoke() }
                    $task.State = 'Pending'
                }
                catch {
                    $task.State = 'Error'
                    $task.LastError = $_
                    Write-PSFMessage -EnableException $false -Level Warning -Message "[Maintenance] Task '$($task.Name)' failed to execute" -ErrorRecord $_ -FunctionName "task:TaskEngine" -Target $task -ModuleName PSFramework
                }
                $task.LastExecution = Get-Date
                if (-not $task.Pending -and ($task.State -eq "Pending")) { $task.State = 'Completed' }
                $tasksDone += $task.Name
            }
            
            # If there will no more tasks need executing in the future, might as well kill the runspace
            if (-not ([PSFramework.TaskEngine.TaskHost]::HasPendingTasks)) { break }
            
            Start-Sleep -Seconds 5
        }
        #endregion Main Execution
    }
    catch {
        Write-PSFMessage -Level Warning -Message "[Maintenance] Unhandled Error executing Task Engine" -ErrorRecord $_
    }
    finally {
        [PSFramework.Runspace.RunspaceHost]::Runspaces[$___ScriptName].SignalStopped()
    }
}

Register-PSFRunspace -ScriptBlock $scriptBlock -Name 'psframework.taskengine' -NoMessage