/// <summary>
/// Serialize hibernated session information to the standard filename in the given directory.
/// </summary>
public static async Task WriteProtectedAsync <TInfo>(this HibernatedSessions <TInfo> sessions, IAbsFileSystem fileSystem, AbsolutePath rootPath, string fileName)
{
Contract.Requires(fileSystem != null);
Contract.Requires(rootPath != null);
// Due to abnormal process termination, the file that we'll be writing can be corrupted.
// To prevent this issue we first write the file into a temporary location and then we "move it" into a final location.
using (var tempFolder = new DisposableDirectory(fileSystem, rootPath / "Temp"))
{
var jsonTempPath = tempFolder.CreateRandomFileName();
var jsonPath = rootPath / fileName;
using (var memoryStream = new MemoryStream())
{
sessions.SerializeToJSON(memoryStream);
var bytes = memoryStream.ToArray();
var protectedBytes = ProtectedData.Protect(bytes, optionalEntropy: null, DataProtectionScope.CurrentUser);
using var fileStream = await fileSystem.OpenSafeAsync(jsonTempPath, FileAccess.Write, FileMode.Create, FileShare.None);
await fileStream.Stream.WriteAsync(protectedBytes, 0, protectedBytes.Length);
}
fileSystem.MoveFile(jsonTempPath, jsonPath, replaceExisting: true);
}
}
private Task WriteBatchAsync(string[] logEventInfos)
{
return(_context.PerformOperationAsync(Tracer, async() =>
{
// TODO: retry policy for writing to file?
var blobName = GenerateBlobName();
var stagingLogFilePath = _configuration.StagingFolderPath / blobName;
var logFile = (await WriteLogsToFileAsync(_context, stagingLogFilePath, logEventInfos).ThrowIfFailure()).Value;
var uploadLogFilePath = _configuration.UploadFolderPath / blobName;
_fileSystem.MoveFile(stagingLogFilePath, uploadLogFilePath, replaceExisting: true);
logFile.Path = uploadLogFilePath;
_uploadQueue.Enqueue(logFile);
return BoolResult.Success;
},
counter: Counters[AzureBlobStorageLogCounters.ProcessBatchCalls]));
}
/// <summary>
/// Serialize hibernated session information to the standard filename in the given directory.
/// </summary>
public static void Write <TInfo>(this HibernatedSessions <TInfo> sessions, IAbsFileSystem fileSystem, AbsolutePath rootPath, string fileName)
{
Contract.Requires(rootPath != null);
// Due to abnormal process termination, the file that we'll be writing can be corrupted.
// To prevent this issue we first write the file into a temporary location and then we "move it" into a final location.
using (var tempFolder = new DisposableDirectory(fileSystem, rootPath / "Temp"))
{
var jsonTempPath = tempFolder.CreateRandomFileName();
var jsonPath = rootPath / fileName;
using (var stream = fileSystem.Open(jsonTempPath, FileAccess.Write, FileMode.Create, FileShare.None))
{
sessions.SerializeToJSON(stream);
}
fileSystem.MoveFile(jsonTempPath, jsonPath, replaceExisting: true);
}
}