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Book review - Microsoft .NET: Architecting Applications for the Enterprise

I've just ended reading of Microsoft .NET: Architecting Applications for the Enterprise (PRO-Developer) from MS Press. It's very valued book for .NET developers and architects.

In the first part book describes fundamental design princiles for design of object oriented software:

• separation of concerns
• open/closed principle
• Liskov's substitution principle
• dependency inversion principle

In the second part the book describes how to apply design patterns to architect layers of enterprise systems:

• business layer
• service layer
• data access layer
• presentation layer

As for design patterns this book widely refers on the Patterns of Enterprise Application Architecture from Martin Fowler. In the business layer chapter I expected some detailed description how to design solutions with Windows Workflow Foundation, but this technology is poorly covered in this book. Except for some point outs I think it is good decision to invest your time to the reading of this book.

PowerShell and Team Foundation Server API

Team Foundation Server has a great API and you can use it to extend its capabilities or automatize tasks and so on. This API can be also used from PowerShell, which demonstrates this post. You have to know only how to use .NET from PowerShell. Following code uses TFS API to get count of new lines of code added in specified changeset:

   1:  ################################################################################

   2:  #

   3:  #  Get-AddedLinesCountInChangeset

   4:  #

   5:  ################################################################################

   6:   

   7:  param 

   8:  (

   9:      [string] $tfsUrl      = $(throw "TFS URL is required"),

  10:      [int]    $changeSetId = $(throw "Changeset ID is required")

  11:  )

  12:   

  13:  [void][Reflection.Assembly]::LoadWithPartialName("Microsoft.TeamFoundation.Client")

  14:  [void][Reflection.Assembly]::LoadWithPartialName("Microsoft.TeamFoundation.VersionControl.Client")

  15:   

  16:  function LinesCountInFile($item, $version)

  17:  {

  18:      $tempFile = [System.IO.Path]::GetTempFileName()

  19:   

  20:      $itemVersion = $vcs.GetItem($item.ServerItem, $version)

  21:      $itemVersion.DownloadFile($tempFile)

  22:      $linesCount = (Get-Content $tempFile | Measure-Object).Count

  23:      Remove-Item -Force $tempFile

  24:   

  25:      $linesCount

  26:  }

  27:   

  28:  function ProcessChange($change)

  29:  {

  30:      if($change.Item.ItemType -eq "Folder")

  31:      {

  32:          return $False

  33:      }

  34:   

  35:      $extensions = ".cs", ".aspx", ".ascx", ".xml", ".xaml", ".config"

  36:   

  37:      foreach ($extension in $extensions)

  38:      {

  39:          if ($change.Item.ServerItem.EndsWith($extension))

  40:          {

  41:              return $True

  42:          }

  43:      }

  44:   

  45:      return $False

  46:  }

  47:   

  48:  $tfs = [Microsoft.TeamFoundation.Client.TeamFoundationServerFactory]::GetServer($tfsUrl)

  49:  $vcs = $tfs.GetService([Microsoft.TeamFoundation.VersionControl.Client.VersionControlServer])

  50:   

  51:  $thisVersionSpec = New-Object Microsoft.TeamFoundation.VersionControl.Client.ChangesetVersionSpec $changeSetId

  52:  $previousVersionSpec = New-Object Microsoft.TeamFoundation.VersionControl.Client.ChangesetVersionSpec ($changeSetId - 1)

  53:   

  54:  $chs = $vcs.GetChangeset($changeSetId)

  55:  $totalLinesCount = 0

  56:  Write-Host

  57:   

  58:  foreach ($change in $chs.Changes)

  59:  {

  60:      if (ProcessChange($change))

  61:      {

  62:          $nameParts = $change.Item.ServerItem.Split("/")

  63:          $fileName = $nameParts[$nameParts.Length - 1]

  64:   

  65:          $thisLength = LinesCountInFile $change.Item $thisVersionSpec

  66:   

  67:          if ($change.ChangeType.ToString().Contains("Add"))

  68:          {

  69:              $previousLength = 0

  70:          }

  71:          else

  72:          {

  73:              $previousLength = LinesCountInFile $change.Item $previousVersionSpec

  74:          }

  75:   

  76:          $added = $thisLength - $previousLength

  77:   

  78:          Write-Host "$fileName             $added" -Fore Yellow

  79:          if ($added -gt 0) { $totalLinesCount = $totalLinesCount + $added }

  80:      }   

  81:  }

  82:   

  83:  Write-Host "------------------------------------------------------"

  84:  Write-Host "Total Lines:            $totalLinesCount" -Fore Green

  85:  Write-Host

If you use TFS 2005/2008 then specify only server url, when TFS 2010 then specify url including the collection.