/// <summary>
/// Writes a group of <see cref="ILogEntry"/>s to the log.
/// </summary>
/// <param name="logEntries">The list of <see cref="ILogEntry"/>s to write.</param>
public override void Write(IEnumerable <ILogEntry> logEntries)
{
if (logEntries == null)
{
throw new ArgumentNullException(nameof(logEntries));
}
if (logEntries.FirstOrDefault() != default(ILogEntry))
{
lock (SyncObject)
{
using (var sw = new System.IO.StreamWriter(LogFilename, true))
{
foreach (var entry in logEntries)
{
if (entry != null)
{
sw.WriteLine(LoggingHelper.FormatLogLine(entry, _WriteLogEntriesUsingLocalTime));
++_LogStats.LogWrites;
}
}
}
if ((AutoTruncateEnabled) && ((new System.IO.FileInfo(LogFilename)).Length > _MaxLogSizeBytes))
{
TruncateLogs();
}
}
}
}
/// <summary>
/// Will truncate log entries from the beginning of the log file.
/// </summary>
/// <returns>The number of logs removed.</returns>
public int TruncateLogs()
{
if (Exists)
{
if (_LogsToRetain <= 0)
{
LastTruncatedCount = LogCount;
Create();
LastTruncatedDate = DateTime.Now;
++AutoTruncateGeneration;
}
else
{
lock (SyncObject)
{
var fileInfo = new System.IO.FileInfo(LogFilename);
var totalLines = LogCount;
if (totalLines > _LogsToRetain)
{
int skipLines = totalLines - _LogsToRetain;
LastTruncatedCount = skipLines;
_TotalTruncatedLogs += LastTruncatedCount;
var tempFilename = System.IO.Path.Combine(System.IO.Path.GetDirectoryName(LogFilename), Guid.NewGuid().ToString());
using (var sw = new System.IO.StreamWriter(tempFilename, false))
{
foreach (var entry in Read())
{
if (--skipLines < 0)
{
if (entry != null)
{
sw.WriteLine(LoggingHelper.FormatLogLine(entry, _WriteLogEntriesUsingLocalTime));
}
}
}
}
Delete();
System.IO.File.Move(tempFilename, LogFilename);
}
LastTruncatedDate = DateTime.Now;
++AutoTruncateGeneration;
}
}
}
if (LastTruncatedCount > LargestTruncatedCount)
{
LargestTruncatedCount = LastTruncatedCount;
}
return(LastTruncatedCount);
}
