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  1. ############################################################################## 
  2. ## 
  3. ## RunACommandInTheBackground 
  4. ## 
  5. ## By Carsten Schwartz 
  6. ## 
  7. ############################################################################## 
  8.  
  9. <# 
  10.  
  11. .SYNOPSIS 
  12.  
  13. Run a command orpowershell script with any number of parameters in the 
  14. background. 
  15.  
  16. .DESCRIPTION 
  17.  
  18. Runs a command or powershell script with any number of parameters in the 
  19. background. The script creates a job runs it and shows start, stop and 
  20. elapsed time when the job is terminated. The job is also removed from the 
  21. Job list on termination. 
  22.  
  23. .EXAMPLE 
  24.  
  25. PS >.\RunACommandInTheBackground.ps1 .\MakeRelease.ps1 https://svnserver:8443/svn/OurProduct/trunk 613 
  26. Starting .\MakeRelease.ps1 https://svnserver:8443/svn/OurProduct/trunk 613 as Job #1...  
  27. PS > Job #1 is finished... 
  28. Job Started:  10/29/2010 07:51:34 
  29. Job Stopped:  10/29/2010 07:54:39 
  30. Time Elapsed: 00:03:05.3862306 
  31. PS > Get-Job 
  32. PS > 
  33.  
  34. #> 
  35.  
  36. function start-jobhere($sCommand){ 
  37.   start-job -argumentlist (get-location),$sCommand { set-location $args[0]; 
  38.   invoke-expression $args[1] } -Name BackgroundRunner 
  39. } 
  40.  
  41. if ($args.length -gt 0) 
  42. { 
  43.   $sScriptCall = $args[0]  
  44.   for ($Count=1; $Count -le $args.length; $Count++) 
  45.   { 
  46.     $sScriptCall += (" " + $args[$Count]) 
  47.   } 
  48.   $job = start-jobhere $sScriptCall 
  49.   "Starting " + $sScriptCall + "as Job #" + $job.Id + "..." 
  50.    
  51.   $creationDate = [string] (Get-Date) 
  52.   Register-ObjectEvent $job StateChanged -MessageData $creationDate -Action { 
  53.     [Console]::Beep(100,100) 
  54.     Write-Host "Job #$($sender.Id) is finished..." 
  55.     $CreationTime    = [datetime] $event.MessageData 
  56.     $TerminationTime = [datetime] $event.TimeGenerated 
  57.     $ElapsedTime     = $TerminationTime - $CreationTime 
  58.     Write-Host ("Job Started:  {0}" -f $CreationTime) 
  59.     Write-Host ("Job Stopped:  {0}" -f $TerminationTime) 
  60.     Write-Host ("Time Elapsed: {0}" -f $ElapsedTime) 
  61.     Write-Host (prompt) -NoNewline 
  62.     $eventSubscriber | Unregister-Event 
  63.     $eventSubscriber.Action | Remove-Job 
  64.     Remove-Job $sender.Id 
  65.   } | Out-Null 
  66. } 
 
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