public async Task RenameAsync(string newName)
{
Debug.WriteLine("WinRTStorageFile.cs | RenameAsync | ");
await _baseFile.RenameAsync(newName, NameCollisionOption.ReplaceExisting);
_renameTaskCompletionSource.SetResult(true);
}
internal override async Task EnqueueAsync(Transmission transmission)
{
try
{
if (transmission == null || this.StorageFolder == null)
{
return;
}
// Initial storage size calculation.
await this.EnsureSizeIsCalculatedAsync().ConfigureAwait(false);
if ((ulong)this.storageSize >= this.CapacityInBytes || this.storageCountFiles >= this.MaxFiles)
{
// if max storage capacity has reached, drop the transmission (but log every 100 lost transmissions).
if (this.transmissionsDropped++ % 100 == 0)
{
CoreEventSource.Log.LogVerbose("Total transmissions dropped: " + this.transmissionsDropped);
}
return;
}
// Writes content to a temporaty file and only then rename to avoid the Peek from reading the file before it is being written.
// Creates the temp file name
string tempFileName = Guid.NewGuid().ToString("N");
// Creates the temp file (doesn't save any content. Just creates the file)
IStorageFile temporaryFile = await this.StorageFolder.CreateFileAsync(tempFileName + ".tmp").AsTask().ConfigureAwait(false);
// Now that the file got created we can increase the files count
Interlocked.Increment(ref this.storageCountFiles);
// Saves transmission to the temp file
await SaveTransmissionToFileAsync(transmission, temporaryFile).ConfigureAwait(false);
// Now that the file is written increase storage size.
long temporaryFileSize = await this.GetSizeAsync(temporaryFile).ConfigureAwait(false);
Interlocked.Add(ref this.storageSize, temporaryFileSize);
// Creates a new file name
string now = DateTime.UtcNow.ToString("yyyyMMddHHmmss");
string newFileName = string.Format(CultureInfo.InvariantCulture, "{0}_{1}.trn", now, tempFileName);
// Renames the file
await temporaryFile.RenameAsync(newFileName, NameCollisionOption.FailIfExists).AsTask().ConfigureAwait(false);
}
catch (Exception e)
{
CoreEventSource.Log.LogVerbose(string.Format(CultureInfo.InvariantCulture, "EnqueueAsync: Exception: {0}", e));
}
}
/// <summary>
/// Renames a file without changing its location.
/// </summary>
/// <param name="newName">The new leaf name of the file.</param>
/// <param name="collisionOption">How to deal with collisions with existing files.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A task which will complete after the file is renamed.
/// </returns>
public async Task RenameAsync(string newName, NameCollisionOption collisionOption, CancellationToken cancellationToken)
{
Requires.NotNullOrEmpty(newName, "newName");
try
{
await _wrappedFile.RenameAsync(newName, (Windows.Storage.NameCollisionOption) collisionOption).AsTask(cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
if (ex.HResult == FILE_ALREADY_EXISTS)
{
throw new IOException("File already exists.", ex);
}
throw;
}
}
public async Task Flush()
{
if (!isEnabled)
{
return;
}
if (!isInit)
{
return;
}
bool earlyExit = false;
lock (editLock)
{
earlyExit = isFlushInProgress;
reFlush = isFlushInProgress;
isFlushInProgress = true;
}
if (earlyExit)
{
return;
}
List <string> copy = new List <string>();
lock (listLock)
{
copy = new List <string>(buffer);
buffer.Clear();
}
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
bool spoolFile = false;
if (copy.Count > 0)
{
try
{
using (var fileStream = await localFolder.OpenStreamForWriteAsync(FILENAME, CreationCollisionOption.OpenIfExists))
{
foreach (string logMessage in copy)
{
byte[] bytes = Encoding.UTF8.GetBytes(logMessage.ToString());
fileStream.Write(bytes, 0, bytes.Length);
if (fileStream.Length > MAX_FILE_LENGTH)
{
spoolFile = true;
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
Debugger.Break();
}
}
if (spoolFile)
{
IStorageFile currentLogFile = await localFolder.GetFileAsync(FILENAME);
if (currentLogFile != null)
{
await currentLogFile.RenameAsync(SPOOLED_FILENAME, NameCollisionOption.ReplaceExisting);
}
}
bool runAgain = false;
lock (editLock)
{
isFlushInProgress = false;
runAgain = reFlush;
reFlush = false;
}
if (runAgain)
{
await Flush();
}
}
