//-------------------------------------------//
protected override bool OpenConnection()
{
switch (FileMode)
{
case FileMode.OpenOrCreate:
case FileMode.CreateNew:
case FileMode.Create:
try {
_fileStream = new FileStream(Path, FileMode, FileAccess, FileShare, BufferSize);
} catch (Exception ex) {
Log.Warning(this + " FileStream could not be created. " + ex.Messages());
State = ConnectionState.Broken;
}
break;
case FileMode.Open:
case FileMode.Append:
case FileMode.Truncate:
try {
// ensure the path exists
ManagerResources.CreateFilePath(Path);
// get the file stream
_fileStream = new FileStream(Path, FileMode, FileAccess, FileShare, BufferSize);
} catch (Exception ex) {
Log.Warning(this + " FileStream could not be created. " + ex.Messages());
State = ConnectionState.Broken;
}
break;
}
return(!State.Is(ConnectionState.Broken));
}
/// <summary>
/// Get average statistics of the drive of the specified directory path. Resulting value units
/// are bytes and per second.
/// Note : This method writes a Megabyte to the Stream and then clears it.
/// </summary>
public static void GetStreamStats(string directory, out uint seeks, out uint writes, out uint reads)
{
// create a test file
string filePath = ManagerResources.CreateFilePath(directory, ".drivetest");
// get a stream to the created test file
Teple <LockShared, ByteBuffer> resource;
ManagerConnections.Get <ByteBuffer, ConnectionLocal>(filePath, out resource);
ByteBuffer stream = resource.ArgB;
// get a seek, read and write speed for the Author
Timekeeper time = new Timekeeper();
// write a Megabyte
time.Start();
stream.Write(Generic.Series <byte>((int)Global.Megabyte, 50));
stream.Stream.Flush();
time.Stop();
// derive the number of bytes written per second
writes = (uint)(Global.Megabyte / (time.Milliseconds / 1000));
// perform a number of seeks
time.Start();
for (int i = 1000; i >= 0; --i)
{
stream.Position = 0;
stream.Write((byte)0);
stream.Stream.Flush();
stream.Position = (long)Global.Megabyte - 1L;
stream.Write((byte)0);
stream.Stream.Flush();
}
time.Stop();
// derive the number of seeks per second
seeks = (uint)(1000 / (time.Milliseconds / 1000));
stream.Position = 0;
// read the Megabyte
time.Start();
stream.ReadBytes((int)Global.Megabyte);
stream.Stream.Flush();
time.Stop();
// derive the number of bytes read per second
reads = (uint)(Global.Megabyte / (time.Milliseconds / 1000));
// release the connection
resource.ArgA.Release();
// remove the files
File.Delete(filePath);
}