string GetPostfix(LogFileInfo logFile, IFileAppender fileAppender, Encoding fileEncoding, FileLogEntry entry)
{
if (HasPostfix(logFile, entry))
{
var sb = stringBuilder;
stringBuilder = null;
if (sb == null)
{
sb = new StringBuilder();
}
while (true)
{
BuildPostfix(sb, logFile, entry);
var postfix = sb.ToString();
sb.Clear();
if (CheckLogFile(logFile, postfix, fileAppender, fileEncoding, entry))
{
if (sb.Capacity > 64)
{
sb.Capacity = 64;
}
stringBuilder = sb;
return(postfix);
}
}
}
else
{
return(null);
}
}
public void RemoveAppender(IFileAppender appender)
{
var existingAppender = this.appenders.FirstOrDefault(a => a.GetType().Name == appender.GetType().Name);
if (existingAppender != null)
{
throw new InvalidOperationException(
string.Format("No appender of type {0} is currently in use by the File Exporter.",
appender.GetType().Name));
}
this.appenders.Remove(existingAppender);
}
public void AddAppender(IFileAppender appenderType)
{
var existingAppender = this.appenders.FirstOrDefault(a => a.GetType().Name == appenderType.GetType().Name);
if (existingAppender != null)
{
throw new InvalidOperationException(
string.Format("The type of appender {0} is already being used by the File Exporter.",
appenderType.GetType().Name));
}
this.appenders.Add(appenderType);
}
private async Task WriteEntryAsync(LogFileInfo logFile, FileLogEntry entry, CancellationToken shutdownToken)
{
// discarding remaining entries on shutdown
shutdownToken.ThrowIfCancellationRequested();
IFileAppender fileAppender = GetFileAppender(logFile);
Encoding fileEncoding = GetFileEncoding(logFile, entry);
var postfix = GetPostfix(logFile, fileAppender, fileEncoding, entry);
var filePath = logFile.GetFilePath(postfix);
var ensureBasePath = logFile.Settings.EnsureBasePath;
IFileInfo fileInfo = fileAppender.FileProvider.GetFileInfo(filePath);
while (true)
{
try
{
await fileAppender.AppendAllTextAsync(fileInfo, entry.Text, fileEncoding, shutdownToken).ConfigureAwait(false);
return;
}
catch
{
if (ensureBasePath)
{
try
{
if (await fileAppender.EnsureDirAsync(fileInfo, shutdownToken).ConfigureAwait(false))
{
await fileAppender.AppendAllTextAsync(fileInfo, entry.Text, fileEncoding, shutdownToken).ConfigureAwait(false);
return;
}
}
catch { }
}
}
// discarding failed entry on shutdown
if (Context.WriteRetryDelay > TimeSpan.Zero)
{
await Task.Delay(Context.WriteRetryDelay, shutdownToken).ConfigureAwait(false);
}
else
{
shutdownToken.ThrowIfCancellationRequested();
}
}
}
protected virtual bool CheckLogFile(LogFileInfo logFile, string postfix, IFileAppender fileAppender, Encoding fileEncoding, FileLogEntry entry)
{
if (logFile.Settings.MaxFileSize > 0)
{
var fileInfo = fileAppender.FileProvider.GetFileInfo(logFile.GetFilePath(postfix));
if (fileInfo.Exists &&
(fileInfo.IsDirectory || fileInfo.Length + fileEncoding.GetByteCount(entry.Text) > logFile.Settings.MaxFileSize))
{
logFile.Counter++;
return(false);
}
}
return(true);
}
public DefaultLoggerPool(string loggerPoolName)
{
LoggerPoolName = loggerPoolName;
fileAppender = new DefaultFileAppender(loggerPoolName);
}
public DefaultLoggerPool(string loggerPoolName)
{
LoggerPoolName = loggerPoolName;
fileAppender = new DefaultFileAppender(loggerPoolName);
}
