internal async Task Start()
{
int origin = Interlocked.CompareExchange(ref _state, _connecting, _none);
if (origin == _disposed)
{
throw new ObjectDisposedException("This tcp socket session has been disposed when connecting.");
}
else if (origin != _none)
{
throw new InvalidOperationException("This tcp socket session is in invalid state when connecting.");
}
try
{
if (_receiveBuffer == default(ArraySegment <byte>))
{
_receiveBuffer = _bufferManager.BorrowBuffer();
}
_receiveBufferOffset = 0;
if (Interlocked.CompareExchange(ref _state, _connected, _connecting) != _connecting)
{
await Close(); // connected with wrong state
throw new ObjectDisposedException("This tcp socket session has been disposed after connected.");
}
_log.DebugFormat("Session started on [{0}] in dispatcher [{1}] with session count [{2}].",
this.StartTime.ToString(@"yyyy-MM-dd HH:mm:ss.fffffff"),
_dispatcher.GetType().Name,
this.Server.SessionCount);
bool isErrorOccurredInUserSide = false;
try
{
await _dispatcher.OnSessionStarted(this);
}
catch (Exception ex) // catch all exceptions from out-side
{
isErrorOccurredInUserSide = true;
await HandleUserSideError(ex);
}
if (!isErrorOccurredInUserSide)
{
await Process();
}
else
{
await Close(); // user side handle tcp connection error occurred
}
}
catch (Exception ex) // catch exceptions then log then re-throw
{
_log.Error(string.Format("Session [{0}] exception occurred, [{1}].", this, ex.Message), ex);
await Close(); // handle tcp connection error occurred
throw;
}
}
internal async Task Start()
{
int origin = Interlocked.CompareExchange(ref _state, _connecting, _none);
if (origin == _disposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
else if (origin != _none)
{
throw new InvalidOperationException("This tcp socket session has already started.");
}
try
{
_receiveBuffer = _bufferManager.BorrowBuffer();
_sessionBuffer = _bufferManager.BorrowBuffer();
_sessionBufferCount = 0;
if (Interlocked.CompareExchange(ref _state, _connected, _connecting) != _connecting)
{
throw new ObjectDisposedException(GetType().FullName);
}
_log.DebugFormat("Session started on [{0}] in dispatcher [{1}] with session count [{2}].",
this.StartTime.ToString(@"yyyy-MM-dd HH:mm:ss.fffffff"),
_dispatcher.GetType().Name,
this.Server.SessionCount);
bool isErrorOccurredInUserSide = false;
try
{
await _dispatcher.OnSessionStarted(this);
}
catch (Exception ex)
{
isErrorOccurredInUserSide = true;
HandleUserSideError(ex);
}
if (!isErrorOccurredInUserSide)
{
await Process();
}
else
{
await Close();
}
}
catch (Exception ex)
when(ex is TimeoutException)
{
_log.Error(string.Format("Session [{0}] exception occurred, [{1}].", this, ex.Message), ex);
await Close();
}
}