public void IndicateFileToDelete(string fileName, Etag etag)
{
var deletingFileName = RavenFileNameHelper.DeletingFileName(fileName);
var fileExists = true;
Storage.Batch(accessor =>
{
AssertDeleteOperationNotVetoed(fileName);
var existingFile = accessor.ReadFile(fileName);
if (existingFile == null)
{
// do nothing if file does not exist
fileExists = false;
return;
}
if (existingFile.Metadata[SynchronizationConstants.RavenDeleteMarker] != null)
{
// if it is a tombstone drop it
accessor.Delete(fileName);
fileExists = false;
return;
}
if (etag != null && existingFile.Etag != etag)
throw new ConcurrencyException("Operation attempted on file '" + fileName + "' using a non current etag")
{
ActualETag = existingFile.Etag,
ExpectedETag = etag
};
var metadata = new RavenJObject(existingFile.Metadata).WithDeleteMarker();
var renameSucceeded = false;
int deleteAttempts = 0;
do
{
try
{
accessor.RenameFile(fileName, deletingFileName);
renameSucceeded = true;
}
catch (FileExistsException) // it means that .deleting file was already existed
{
var deletingFileHeader = accessor.ReadFile(deletingFileName);
if (deletingFileHeader != null && deletingFileHeader.Equals(existingFile))
{
fileExists = false; // the same file already marked as deleted no need to do it again
return;
}
if (deleteAttempts++ > 128)
{
Log.Warn("Could not rename a file '{0}' when a delete operation was performed", fileName);
throw;
}
// we need to use different name to do a file rename
deletingFileName = RavenFileNameHelper.DeletingFileName(fileName, RandomProvider.GetThreadRandom().Next());
}
} while (renameSucceeded == false);
accessor.UpdateFileMetadata(deletingFileName, metadata, null);
accessor.DecrementFileCount(deletingFileName);
Log.Debug("File '{0}' was renamed to '{1}' and marked as deleted", fileName, deletingFileName);
var configName = RavenFileNameHelper.DeleteOperationConfigNameForFile(deletingFileName);
var operation = new DeleteFileOperation { OriginalFileName = fileName, CurrentFileName = deletingFileName };
accessor.SetConfig(configName, JsonExtensions.ToJObject(operation));
FileSystem.DeleteTriggers.Apply(trigger => trigger.AfterDelete(fileName));
Publisher.Publish(new ConfigurationChangeNotification { Name = configName, Action = ConfigurationChangeAction.Set });
Publisher.Publish(new FileChangeNotification { File = fileName, Action = FileChangeAction.Delete });
Log.Debug("File '{0}' was deleted", fileName);
});
if (fileExists)
{
Search.Delete(fileName);
Search.Delete(deletingFileName);
}
}
public void IndicateFileToDelete(string fileName)
{
var deletingFileName = RavenFileNameHelper.DeletingFileName(fileName);
var fileExists = true;
storage.Batch(accessor =>
{
var existingFileHeader = accessor.ReadFile(fileName);
if (existingFileHeader == null)
{
// do nothing if file does not exist
fileExists = false;
return;
}
if (existingFileHeader.Metadata[SynchronizationConstants.RavenDeleteMarker] != null)
{
// if it is a tombstone drop it
accessor.Delete(fileName);
fileExists = false;
return;
}
var metadata = new RavenJObject(existingFileHeader.Metadata).WithDeleteMarker();
var renameSucceeded = false;
int deleteVersion = 0;
do
{
try
{
accessor.RenameFile(fileName, deletingFileName);
renameSucceeded = true;
}
catch (FileExistsException) // it means that .deleting file was already existed
{
var deletingFileHeader = accessor.ReadFile(deletingFileName);
if (deletingFileHeader != null && deletingFileHeader.Equals(existingFileHeader))
{
fileExists = false; // the same file already marked as deleted no need to do it again
return;
}
// we need to use different name to do a file rename
deleteVersion++;
deletingFileName = RavenFileNameHelper.DeletingFileName(fileName, deleteVersion);
}
} while (!renameSucceeded && deleteVersion < 128);
if (renameSucceeded)
{
accessor.UpdateFileMetadata(deletingFileName, metadata);
accessor.DecrementFileCount(deletingFileName);
Log.Debug(string.Format("File '{0}' was renamed to '{1}' and marked as deleted", fileName, deletingFileName));
var configName = RavenFileNameHelper.DeleteOperationConfigNameForFile(deletingFileName);
var operation = new DeleteFileOperation { OriginalFileName = fileName, CurrentFileName = deletingFileName };
accessor.SetConfig(configName, JsonExtensions.ToJObject(operation));
notificationPublisher.Publish(new ConfigurationChangeNotification { Name = configName, Action = ConfigurationChangeAction.Set });
}
else
{
Log.Warn("Could not rename a file '{0}' when a delete operation was performed", fileName);
}
});
if (fileExists)
{
search.Delete(fileName);
search.Delete(deletingFileName);
}
}