protected override async Task SaveImplAsync(string dataName, ReadOnlyMemory <byte> data, bool doNotOverwrite, CancellationToken cancel = default)
{
string filename = MakeFileName(dataName, Options.FileExtension);
string newFilename = filename + Options.TmpFileExtension;
string directoryName = PathParser.GetDirectoryName(filename);
Mutant?mutant = null;
if (this.Options.GlobalLock)
{
mutant = new Mutant("Hive_GlobalLock_" + filename, false, false);
}
try
{
if (mutant != null)
{
await mutant.LockAsync();
}
if (data.IsEmpty == false)
{
if (doNotOverwrite)
{
if (await FileSystem.IsFileExistsAsync(filename, cancel))
{
throw new ApplicationException($"The file \"{filename}\" exists while doNotOverwrite flag is set.");
}
}
try
{
await FileSystem.CreateDirectoryAsync(directoryName, Options.Flags, cancel);
if (Options.PutGitIgnore)
{
Util.PutGitIgnoreFileOnDirectory(Options.RootDirectoryPath.Value);
}
await FileSystem.WriteDataToFileAsync(newFilename, data, Options.Flags | FileFlags.ForceClearReadOnlyOrHiddenBitsOnNeed, false, cancel);
try
{
await FileSystem.DeleteFileAsync(filename, Options.Flags | FileFlags.ForceClearReadOnlyOrHiddenBitsOnNeed, cancel);
}
catch { }
await FileSystem.MoveFileAsync(newFilename, filename, cancel);
}
finally
{
await FileSystem.DeleteFileAsync(newFilename, Options.Flags | FileFlags.ForceClearReadOnlyOrHiddenBitsOnNeed, cancel);
}
}
else
{
if (doNotOverwrite)
{
throw new ApplicationException($"The file {filename} exists while doNotOverwrite flag is set.");
}
try
{
await FileSystem.DeleteFileAsync(filename, FileFlags.ForceClearReadOnlyOrHiddenBitsOnNeed, cancel);
}
catch { }
try
{
await FileSystem.DeleteFileAsync(newFilename, FileFlags.ForceClearReadOnlyOrHiddenBitsOnNeed, cancel);
}
catch { }
}
}
finally
{
if (mutant != null)
{
await mutant.UnlockAsync();
mutant._DisposeSafe();
}
}
}