public FileMigrationResult MigrateFiles()
{
IList <MediaFile> mediaFiles = _session.QueryOver <MediaFile>().List();
List <Guid> guids =
mediaFiles.Where(
mediaFile =>
MediaFileExtensions.GetFileSystem(mediaFile.FileUrl, _allFileSystems.Values) !=
CurrentFileSystem)
.Select(file => file.Guid).ToList();
if (!guids.Any())
{
return(new FileMigrationResult
{
MigrationRequired = false,
Message = "Migration not required"
});
}
BatchCreationResult result = _createBatch.Create(guids.Chunk(10)
.Select(set => new MigrateFilesBatchJob
{
Data = JsonConvert.SerializeObject(set.ToHashSet()),
}));
return(new FileMigrationResult
{
MigrationRequired = true,
Message = string.Format(
"Batch created. Click <a target=\"_blank\" href=\"{0}\">here</a> to view and start.".AsResource(
_kernel),
_urlHelper.Action("Show", "BatchRun", new { id = result.InitialBatchRun.Id }))
});
}
protected override BatchJobExecutionResult OnExecute(MigrateFilesBatchJob batchJob)
{
var guids = JsonConvert.DeserializeObject <HashSet <Guid> >(batchJob.Data).ToList();
var mediaFiles = _session.QueryOver <MediaFile>().Where(x => x.Guid.IsIn(guids)).List();
foreach (var mediaFile in mediaFiles)
{
var from = MediaFileExtensions.GetFileSystem(mediaFile.FileUrl, _fileSystems);
var to = CurrentFileSystem;
if (from.GetType() == to.GetType())
{
continue;
}
_session.Transact(session =>
{
// remove resized images (they will be regenerated on the to system)
foreach (var resizedImage in mediaFile.ResizedImages.ToList())
{
// check for resized file having same url as the original -
// do not delete from disc yet in that case, or else it will cause an error when copying
if (resizedImage.Url != mediaFile.FileUrl)
{
from.Delete(resizedImage.Url);
}
mediaFile.ResizedImages.Remove(resizedImage);
session.Delete(resizedImage);
}
var existingUrl = mediaFile.FileUrl;
using (var readStream = @from.GetReadStream(existingUrl))
{
mediaFile.FileUrl = to.SaveFile(readStream, GetNewFilePath(mediaFile),
mediaFile.ContentType);
}
from.Delete(existingUrl);
session.Update(mediaFile);
});
}
return(BatchJobExecutionResult.Success());
}