/// <summary>
/// Saves a stream, retry retryCount number of attempts and wait between the attempts if failed on sharing violation
/// </summary>
public static void SaveStream(string filename, Stream stream, int retryCount, TimeSpan wait)
{
var path = Path.GetDirectoryName(filename);
if (!string.IsNullOrEmpty(path) && (!Directory.Exists(path)))
{
Directory.CreateDirectory(path);
}
var tries = 0;
while (true)
{
try
{
SaveStream(filename, stream);
return;
}
catch (IOException e)
{
if (!LockingFileSystem.IsFileLocked(e))
{
throw;
}
if (++tries > retryCount)
{
throw;
}
Thread.Sleep(wait);
}
}
}
/// <summary>
/// queue processor
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
protected override QueuedExecution.ProcessResult ProcessQueue(IItem item)
{
FileOperationItem foi = (FileOperationItem)item;
if (foi.Type == FileOperationItem.OperationType.Load)
{
if (_filenamelock.IsReaderLocked(foi.Filename))
{
return(QueuedExecution.ProcessResult.FailRequeue);
}
_filenamelock.EnterReader(foi.Filename);
foi.output = LockingFileSystem.LoadStream(foi.Filename);//, int.MaxValue, TimeSpan.FromMilliseconds(1));
_filenamelock.ExitReader(foi.Filename);
return(ProcessResult.Success);
}
else if (foi.Type == FileOperationItem.OperationType.Save)
{
_filenamelock.EnterWriter(foi.Filename);
LockingFileSystem.SaveStream(foi.Filename, foi.input);//, int.MaxValue, TimeSpan.FromMilliseconds(1));
_filenamelock.ExitWriter(foi.Filename);
return(ProcessResult.Success);
}
throw new NotImplementedException();
}
/// <summary>
/// Reader Locked Load Stream
/// </summary>
public static Stream LoadStream(string filename)
{
Stream retval;
_filenamelock.EnterReader(filename);
retval = LockingFileSystem.LoadStream(filename);
_filenamelock.ExitReader(filename);
return(retval);
}
/// <summary>
/// Queue Processor
/// </summary>
private void ProcessQueue()
{
while (true)
{
FileOperationItem foi;
if (_operations.TryDequeue(out foi))
{
if (foi.Type == FileOperationItem.OperationType.Load)
{
if (_filenamelock.IsReaderLocked(foi.Filename))
{
_operations.Enqueue(foi);
continue;
}
_filenamelock.EnterReader(foi.Filename);
foi.stream = LockingFileSystem.LoadStream(foi.Filename); //, int.MaxValue, TimeSpan.FromMilliseconds(1));
_filenamelock.ExitReader(foi.Filename);
foi.resetevent.Set();
}
else if (foi.Type == FileOperationItem.OperationType.Save)
{
if (_filenamelock.IsWriterLocked(foi.Filename))
{
_operations.Enqueue(foi);
continue;
}
_filenamelock.EnterWriter(foi.Filename);
LockingFileSystem.SaveStream(foi.Filename, foi.stream); //, int.MaxValue, TimeSpan.FromMilliseconds(1));
_filenamelock.ExitWriter(foi.Filename);
foi.resetevent.Set();
}
}
else
{
Thread.Sleep(1);
}
}
}
/// <summary>
/// WriterLocked Save Stream
/// </summary>
public static void SaveStream(string filename, Stream stream)
{
_filenamelock.EnterWriter(filename);
LockingFileSystem.SaveStream(filename, stream);
_filenamelock.ExitWriter(filename);
}
public static List <payloadresult> PayloadLocking(int threadcount, int iterations, int payloadsize, int filescount, int retry, TimeSpan wait)
{
List <payloadresult> retval = new List <payloadresult>();
byte[] testobject = new byte[payloadsize];
MemoryStream teststream = new MemoryStream(testobject);
//generate short list of filenames
List <string> filenames = GenerateFilenames(filescount);
//write all filenames
for (int i = 0; i < filenames.Count; i++)
{
LockingFileSystem.SaveStream(filenames[i], teststream);
}
//check read speed
var sw = TimePayload(threadcount, iterations, () =>
{
var stream = LockingFileSystem.LoadStream(filenames[GetRandom(0, filenames.Count - 1)], retry, wait);
});
retval.Add(new payloadresult
{
Method = "Locking",
Action = "R",
Threads = threadcount,
Time = sw.ElapsedMilliseconds
});
Console.WriteLine("Threads: {0} Locking Load took {1}ms fps: {2}", threadcount, sw.ElapsedMilliseconds, ((threadcount * iterations) / ((sw.ElapsedMilliseconds) / 1000f)));
//check write speed
sw = TimePayload(threadcount, iterations, () =>
{
LockingFileSystem.SaveStream(filenames[GetRandom(0, filenames.Count - 1)], teststream, retry, wait);
});
retval.Add(new payloadresult
{
Method = "Locking",
Action = "W",
Threads = threadcount,
Time = sw.ElapsedMilliseconds
});
Console.WriteLine("Threads: {0} Locking Save took {1}ms fps: {2}", threadcount, sw.ElapsedMilliseconds, ((threadcount * iterations) / ((sw.ElapsedMilliseconds) / 1000f)));
//check readwrite speed
sw = TimePayload(threadcount, iterations / 2, () =>
{
var stream = LockingFileSystem.LoadStream(filenames[GetRandom(0, filenames.Count - 1)], retry, wait);
LockingFileSystem.SaveStream(filenames[GetRandom(0, filenames.Count - 1)], teststream, retry, wait);
});
retval.Add(new payloadresult
{
Method = "Locking",
Action = "R/W",
Threads = threadcount,
Time = sw.ElapsedMilliseconds
});
Console.WriteLine("Threads: {0} Locking Save/Load took {1}ms fps: {2}", threadcount, sw.ElapsedMilliseconds, ((threadcount * iterations) / ((sw.ElapsedMilliseconds) / 1000f)));
//cleanup
DeleteFiles(filenames);
return(retval);
}
