public RollingFileSink(string path,
ITextFormatter textFormatter,
long?fileSizeLimitBytes,
int?retainedFileCountLimit,
Encoding encoding,
bool buffered,
bool shared,
RollingInterval rollingInterval,
bool rollOnFileSizeLimit,
FileLifecycleHooks hooks)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
if (fileSizeLimitBytes.HasValue && fileSizeLimitBytes < 0)
{
throw new ArgumentException("Negative value provided; file size limit must be non-negative.");
}
if (retainedFileCountLimit.HasValue && retainedFileCountLimit < 1)
{
throw new ArgumentException("Zero or negative value provided; retained file count limit must be at least 1.");
}
_roller = new PathRoller(path, rollingInterval);
_textFormatter = textFormatter;
_fileSizeLimitBytes = fileSizeLimitBytes;
_retainedFileCountLimit = retainedFileCountLimit;
_encoding = encoding;
_buffered = buffered;
_shared = shared;
_rollOnFileSizeLimit = rollOnFileSizeLimit;
_hooks = hooks;
}
// This overload should be used internally; the overload above maintains compatibility with the earlier public API.
internal FileSink(
string path,
ITextFormatter textFormatter,
long?fileSizeLimitBytes,
Encoding encoding,
bool buffered,
FileLifecycleHooks hooks)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
if (fileSizeLimitBytes.HasValue && fileSizeLimitBytes < 0)
{
throw new ArgumentException("Negative value provided; file size limit must be non-negative.");
}
_textFormatter = textFormatter ?? throw new ArgumentNullException(nameof(textFormatter));
_fileSizeLimitBytes = fileSizeLimitBytes;
_buffered = buffered;
var directory = Path.GetDirectoryName(path);
if (!string.IsNullOrWhiteSpace(directory) && !Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
Stream outputStream = _underlyingStream = System.IO.File.Open(path, FileMode.Append, FileAccess.Write, FileShare.Read);
if (_fileSizeLimitBytes != null)
{
outputStream = _countingStreamWrapper = new WriteCountingStream(_underlyingStream);
}
// Parameter reassignment.
encoding = encoding ?? new UTF8Encoding(encoderShouldEmitUTF8Identifier: false);
if (hooks != null)
{
outputStream = hooks.OnFileOpened(outputStream, encoding) ??
throw new InvalidOperationException($"The file lifecycle hook `{nameof(FileLifecycleHooks.OnFileOpened)}(...)` returned `null`.");
}
_output = new StreamWriter(outputStream, encoding);
}