public void TheLogFileIsNotRequiredToIncludeADirectory()
{
var roller = new TemplatedPathRoller("log-{Date}");
var now = new DateTime(2013, 7, 14, 3, 24, 9, 980);
string path;
roller.GetLogFilePath(now, 0, out path);
AssertAreEqualAbsolute("log-20130714", path);
}
public void IfNoTokenIsSpecifiedDashFollowedByTheDateIsImplied()
{
var roller = new TemplatedPathRoller("Logs\\log.txt");
var now = new DateTime(2013, 7, 14, 3, 24, 9, 980);
string path;
roller.GetLogFilePath(now, 0, out path);
AssertAreEqualAbsolute("Logs\\log-20130714.txt", path);
}
public void ANonZeroIncrementIsIncludedAndPadded()
{
var roller = new TemplatedPathRoller("Logs\\log.{Date}.txt");
var now = new DateTime(2013, 7, 14, 3, 24, 9, 980);
string path;
roller.GetLogFilePath(now, 12, out path);
AssertAreEqualAbsolute("Logs\\log.20130714_012.txt", path);
}
public void TheLogFileIncludesDateToken()
{
var roller = new TemplatedPathRoller("Logs\\log.{Date}.txt");
var now = new DateTime(2013, 7, 14, 3, 24, 9, 980);
string path;
roller.GetLogFilePath(now, 0, out path);
AssertAreEqualAbsolute("Logs\\log.20130714.txt", path);
}
public void TheLogFileIncludesDateTokenAndSetsCheckpointToNextDay()
{
var roller = new TemplatedPathRoller("Logs\\log.{Date}.txt");
var now = new DateTime(2013, 7, 14, 3, 24, 9, 980);
string path;
DateTime nextCheckpoint;
roller.GetLogFilePath(now, out path, out nextCheckpoint);
AssertAreEqualAbsolute("Logs\\log.20130714.txt", path);
Assert.AreEqual(new DateTime(2013, 7, 15), nextCheckpoint);
}
void OpenFile(DateTime now)
{
string path;
DateTime nextCheckpoint;
_roller.GetLogFilePath(now, out path, out nextCheckpoint);
_nextCheckpoint = nextCheckpoint;
_currentFile = new FileSink(path, _textFormatter, _fileSizeLimitBytes);
ApplyRetentionPolicy(path);
}
void OpenFile(DateTime now)
{
var currentCheckpoint = _roller.GetCurrentCheckpoint(now);
// We only take one attempt at it because repeated failures
// to open log files REALLY slow an app down.
_nextCheckpoint = _roller.GetNextCheckpoint(now);
var existingFiles = Enumerable.Empty <string>();
try
{
existingFiles = Directory.GetFiles(_roller.LogFileDirectory, _roller.DirectorySearchPattern)
.Select(Path.GetFileName);
}
catch (DirectoryNotFoundException) { }
var latestForThisCheckpoint = _roller
.SelectMatches(existingFiles)
.Where(m => m.DateTime == currentCheckpoint)
.OrderByDescending(m => m.SequenceNumber)
.FirstOrDefault();
var sequence = latestForThisCheckpoint != null ? latestForThisCheckpoint.SequenceNumber : 0;
const int maxAttempts = 3;
for (var attempt = 0; attempt < maxAttempts; attempt++)
{
string path;
_roller.GetLogFilePath(now, sequence, out path);
try
{
_currentFile = _shared ?
(ILogEventSink) new SharedFileSink(path, _textFormatter, _fileSizeLimitBytes, _encoding) :
new FileSink(path, _textFormatter, _fileSizeLimitBytes, _encoding, _buffered);
}
catch (IOException ex)
{
if (IOErrors.IsLockedFile(ex))
{
SelfLog.WriteLine("Rolling file target {0} was locked, attempting to open next in sequence (attempt {1})", path, attempt + 1);
sequence++;
continue;
}
throw;
}
ApplyRetentionPolicy(path);
return;
}
}
void OpenFile(DateTime now)
{
var date = now.Date;
// We only take one attempt at it because repeated failures
// to open log files REALLY slow an app down.
_nextCheckpoint = date.AddDays(1);
var existingFiles = Enumerable.Empty <string>();
try
{
existingFiles = Directory.GetFiles(_roller.LogFileDirectory, _roller.DirectorySearchPattern)
.Select(Path.GetFileName);
}
catch (DirectoryNotFoundException) { }
var latestForThisDate = _roller
.SelectMatches(existingFiles)
.Where(m => m.Date == date)
.OrderByDescending(m => m.SequenceNumber)
.FirstOrDefault();
var sequence = latestForThisDate != null ? latestForThisDate.SequenceNumber : 0;
const int maxAttempts = 3;
for (var attempt = 0; attempt < maxAttempts; attempt++)
{
string path;
_roller.GetLogFilePath(now, sequence, out path);
try
{
_currentFile = new FileSink(path, _textFormatter, _fileSizeLimitBytes);
}
catch (IOException ex)
{
var errorCode = Marshal.GetHRForException(ex) & ((1 << 16) - 1);
if (errorCode == 32 || errorCode == 33)
{
SelfLog.WriteLine("Rolling file target {0} was locked, attempting to open next in sequence (attempt {1})", path, attempt + 1);
sequence++;
continue;
}
throw;
}
ApplyRetentionPolicy(path);
return;
}
}
public void TheLogFileIsNotRequiredToIncludeAnExtension()
{
var roller = new TemplatedPathRoller("Logs\\log-{Date}");
var now = new DateTime(2013, 7, 14, 3, 24, 9, 980);
string path;
DateTime nextCheckpoint;
roller.GetLogFilePath(now, out path, out nextCheckpoint);
AssertAreEqualAbsolute("Logs\\log-20130714", path);
}