// -------
/// <summary>
/// Supports the changing of file name, size, etc.
/// </summary>
public void ChangeFileProperties(FileParameterStruct newFileParameter)
{
if (!newFileParameter.ValidateConstructorParameters(false, out string problem))
{
throw new Exception("LogFileWriter.ChangeProperties(): Invalide parameters '" + newFileParameter.ToString() + "'." +
(problem == null ? "" : " The following problem occured: " + Environment.NewLine + problem));
}
this.newFileParameter = newFileParameter;
isNewFileParameter = true;
}
/// <summary>
/// Check if file parameters are valid
/// </summary>
public static bool ValidateConstructorParameters(
string directoryPath,
string fileName,
long maxFileByteCount,
int maxFileCount,
out string problem) //
{
FileParameterStruct validateFileParameterStruct = new FileParameterStruct(directoryPath, fileName, "txt", maxFileByteCount, maxFileCount);
return(validateFileParameterStruct.ValidateConstructorParameters(true, out problem));
}
/// <summary>
/// Constructor
///
/// Creates and opens/closes a file
///
/// will throw an exception if file cannot be created
/// </summary>
public FileSizeManager(FileParameterStruct newParameter)
{
//ensure that parameters are valid.
if (!newParameter.ValidateConstructorParameters(false, out string problem))
{
throw new Exception("Cannot create '" + newParameter.ToString() + "'." +
(problem == "" ? "" : " The following problem occured: " + Environment.NewLine + problem));
}
//create directory if necessary and prepare filelist
directoryInfo = Directory.CreateDirectory(newParameter.DirectoryPath);
newParameter.UpdateDirectoryPath(directoryInfo.FullName);
fileParameter = newParameter;
fileList = new List <FileInfoNumberStruct>();
//Read fileinfos with file numbers into sorted fileList
FileInfo[] fileInfos =
directoryInfo.GetFiles(fileParameter.GetFileSearchPattern(), SearchOption.TopDirectoryOnly);
currentFileNumber = 1;
//TestFileName123.tst ==> 123
// TestFileName
int startPos = fileParameter.FileName.Length;
// . tst
int extensionLength = 1 + fileParameter.FileExtension.Length;
foreach (FileInfo fileInfo in fileInfos)
{
string fileName = fileInfo.Name;
if (int.TryParse(fileName.Substring(startPos, fileName.Length - startPos - extensionLength), out int fileNumber))
{
fileList.Add(new FileInfoNumberStruct(fileNumber, fileInfo));
if (fileNumber > currentFileNumber)
{
currentFileNumber = fileNumber;
}
}
}
fileList.Sort();
//make sure that the correct number of files exist,
if (fileList.Count == 0)
{
createNewFile();
}
else
{
enforceFileCountMax();
currentFileInfo = fileList[fileList.Count - 1].FileInfo;
}
}
/// <summary>
/// Constructor LogFileWriter
/// </summary>
public LogFileWriter(
FileParameterStruct fileParameter,
Func <string>?getNewFileHeader = null,
Func <string>?getNewDayHeader = null,
int maxMessageQueueSize = maxMessageQueueSizeDefault,
int logFileWriterTimerInitialDelay = 10,
int logFileWriterTimerInterval = 10000)
{
this.getNewFileHeader = getNewFileHeader;
this.getNewDayHeader = getNewDayHeader;
this.maxMessageQueueSize = maxMessageQueueSize;
fileSizeManager = new FileSizeManager(fileParameter);
initialiseLogFileWriterTimer(logFileWriterTimerInitialDelay, logFileWriterTimerInterval);
}
void initialiseNewParameter()
{
FileParameterStruct existingFileParameter = fileSizeManager.FileParameter;
if (existingFileParameter.DirectoryPath == newFileParameter.DirectoryPath &&
existingFileParameter.FileName == newFileParameter.FileName &&
existingFileParameter.FileExtension == newFileParameter.FileExtension) //
{
//only max size or number of files has changed. Just change some FileSizeManager properties.
fileSizeManager.ChangeProperties(newFileParameter.MaxFileByteCount, newFileParameter.MaxFileCount);
}
else
{
//file name or location has changed, a new FileSizeManager is needed.
fileSizeManager = new FileSizeManager(newFileParameter);
}
isNewFileParameter = false;
lastDate = DateTime.Now.Date;
}