コード例 #1
0
        void CloseFile()
        {
            if (m_currentFile != null)
            {
                m_currentFile.Dispose();
                m_currentFile = null;
            }

            m_nextCheckpoint = null;
        }
コード例 #2
0
        void OpenFile(DateTime now)
        {
            var date = now.Date;

            var latestFileForNow = EnumerateFiles().FirstOrDefault(v => v.Date == date);
            var sequence         = (latestFileForNow?.SequenceNumber ?? 0) + 1;

            // Re-open the file on the next day.
            m_nextCheckpoint = date.AddDays(1);

            const int maxAttempts = 3;

            for (var attempt = 0; attempt < maxAttempts; attempt++)
            {
                var newFileName = ConstructLogFilename(now, sequence);

                try
                {
                    m_currentFile = new SizedFileSink(newFileName, m_textFormatter, m_encoding);
                }
                catch (IOException ex)
                {
                    var errorCode = Marshal.GetHRForException(ex) & ((1 << 16) - 1);
                    if (errorCode == 32 || errorCode == 33)
                    {
                        // "Rolling file target {0} was locked, attempting to open next in sequence (attempt {1})", newFileName, attempt + 1);
                        sequence++;
                        continue;
                    }

                    throw;
                }

                // Purge old files.
                ApplyRetentionPolicy(now, newFileName);
                return;
            }
        }
コード例 #3
0
 protected override bool ShouldRollFile(DateTime now, SizedFileSink currentFile)
 {
     // Close previous file if size reached.
     return(m_fileSizeLimitBytes.HasValue && currentFile.EstimatedLength >= m_fileSizeLimitBytes.Value);
 }
コード例 #4
0
 /// <summary>
 /// Return true if the current file should be closed.
 /// </summary>
 /// <param name="now">Time of the call</param>
 /// <param name="currentFile"></param>
 /// <returns></returns>
 protected abstract bool ShouldRollFile(DateTime now, SizedFileSink currentFile);