Windows Application, Windows NT Service

Version B

Archive of local files' versions

• Functionality:
  • A user specifies paths of files which changes should be tracked and versions stored in the archive
• Elements:
  • Windows application:
• Main window with a list of all stored versions of selected file and a tab control to select the file
  • for each version: time of adding and a path to the version
  • each tracked file has a tab in a tab control
  button 'Remove' - removes all selected versions (allow multiple selection)
• Configuration window with a list of tracked files which allows a user to add and remove files from the list
• Windows NT service (also called Windows XP service):
  • It waits for a signal of modification of any traced file. After a signal it compares current content of the file with the last version stored in the archive, if they differ current version is added to the archive with current time
• Assembly in Global Assembly Cache:
• It manages the archive, all changes done in the archive, both from the service and from the application, are done using this assembly
• Public methods:
  • to get list of traced files
  • to add file to the list
  • to remove file from the list - should also delete all versions of this file
  • to get list of file's versions
  • to add version of file - save the version to new file in archive's folder, filename can be changed, but extension must be original
  • to remove version of file
• Installer
  • It installs complete solution on user's system (all three elements)
Hints:
• FileSystemWatcher
• sn.exe
• [assembly:AssemblyKeyFileAttribute]
• System.Threading.Timer, System.Threading.Thread.Sleep()

• Approximate points:
  • windows application: 2.5
  • windows NT service: 2.5
  • assembly in GAC and using it: 4.0
  • installer: 1.0