public MultiPopulation(int p1, int p2, MigrationStrategies.Random migrationStrategy)
{
// TODO: Complete member initialization
this.p1 = p1;
this.p2 = p2;
this.migrationStrategy = migrationStrategy;
}
public void Migrate()
{
var filesToDelete = new List <string>();
if (File.Exists(BackupFilePath))
{
File.Delete(BackupFilePath);
}
File.Copy(SourceFilePath, BackupFilePath);
filesToDelete.Add(BackupFilePath);
int currentVersion = GetFileVersion();
string sourceFilePath = SourceFilePath;
string destinationFilePath = "";
while (currentVersion != ToVersion)
{
IMigrationStrategy strategy = MigrationStrategies.Find(s => s.FromVersion == currentVersion);
if (strategy == null)
{
throw new InvalidOperationException(
String.Format("No migration strategy could be found for version {0}", currentVersion)
);
}
destinationFilePath = String.Format("{0}.Migrate_{1}_{2}", SourceFilePath, strategy.FromVersion, strategy.ToVersion);
strategy.Migrate(sourceFilePath, destinationFilePath);
filesToDelete.Add(destinationFilePath);
currentVersion = strategy.ToVersion;
sourceFilePath = destinationFilePath;
}
File.Delete(SourceFilePath);
File.Move(destinationFilePath, SourceFilePath);
foreach (var filePath in filesToDelete)
{
if (File.Exists(filePath))
{
File.Delete(filePath);
}
}
}
///<summary>
/// Perform the migration
///</summary>
///<exception cref="InvalidOperationException"></exception>
public virtual void Migrate()
{
var problems = new List <FolderMigratorProblem>();
// Clean up root backup path
if (Directory.Exists(MigrationPath))
{
if (!RobustIO.DeleteDirectoryAndContents(MigrationPath))
{
//for user, ah well
//for programmer, tell us
Debug.Fail("(Debug mode only) Couldn't delete the migration folder");
}
}
//check if there is anything to migrate. If not, don't do anything
if (!Directory.Exists(SourcePath))
{
return;
}
if (GetLowestVersionInFolder(SourcePath) == ToVersion)
{
return;
}
// Backup current folder to backup path under backup root
CopyDirectory(SourcePath, BackupPath, MigrationPath);
string currentPath = BackupPath;
int lowestVersionInFolder;
int lowestVersoinInFolder1 = -1;
while ((lowestVersionInFolder = GetLowestVersionInFolder(currentPath)) != ToVersion)
{
//This guards against an empty Folder
if (lowestVersionInFolder == int.MaxValue)
{
break;
}
if (lowestVersionInFolder == lowestVersoinInFolder1)
{
var fileNotMigrated = _versionCache.First(info => info.Version == lowestVersionInFolder).FileName;
throw new ApplicationException(
String.Format("The migration strategy for {0} failed to migrate the file '{1} from version {2}",
SearchPattern, fileNotMigrated,
lowestVersoinInFolder1)
);
}
int currentVersion = lowestVersionInFolder;
// Get all files in folder with this version
var fileNamesToMigrate = GetFilesOfVersion(currentVersion, currentPath);
// Find a strategy to migrate this version
IMigrationStrategy strategy = MigrationStrategies.Find(s => s.FromVersion == currentVersion);
if (strategy == null)
{
throw new InvalidOperationException(
String.Format("No migration strategy could be found for version {0}", currentVersion)
);
}
string destinationPath = Path.Combine(
MigrationPath, String.Format("{0}_{1}", strategy.FromVersion, strategy.ToVersion)
);
Directory.CreateDirectory(destinationPath);
// Migrate all the files of the current version
foreach (var filePath in Directory.GetFiles(currentPath, SearchPattern))
{
string fileName = Path.GetFileName(filePath);
if (fileName == null)
{
continue;
}
string sourceFilePath = Path.Combine(currentPath, fileName);
string targetFilePath = Path.Combine(destinationPath, fileName);
if (fileNamesToMigrate.Contains(sourceFilePath))
{
strategy.Migrate(sourceFilePath, targetFilePath);
}
else
{
File.Copy(sourceFilePath, targetFilePath);
}
}
try
{
strategy.PostMigrate(currentPath, destinationPath);
}
catch (Exception e)
{
problems.Add(new FolderMigratorProblem {
Exception = e, FilePath = currentPath
});
}
// Setup for the next iteration
currentPath = destinationPath;
lowestVersoinInFolder1 = lowestVersionInFolder;
}
// Delete all the files in SourcePath matching SearchPattern
foreach (var filePath in Directory.GetFiles(SourcePath, SearchPattern))
{
File.Delete(filePath);
}
// Copy the migration results into SourcePath
CopyDirectory(currentPath, SourcePath, "");
if (!RobustIO.DeleteDirectoryAndContents(MigrationPath))
{
//for user, ah well
//for programmer, tell us
Debug.Fail("(Debug mode only) Couldn't delete the migration folder");
}
// Call the problem handler if we encountered problems during migration.
if (problems.Count > 0)
{
_problemHandler(problems);
}
}
