public void MainLoopIteration()
{
InboundFrame frame = m_frameHandler.ReadFrame();
NotifyHeartbeatListener();
// We have received an actual frame.
if (frame.IsHeartbeat())
{
// Ignore it: we've already just reset the heartbeat
// latch.
return;
}
if (frame.Channel == 0)
{
// In theory, we could get non-connection.close-ok
// frames here while we're quiescing (m_closeReason !=
// null). In practice, there's a limited number of
// things the server can ask of us on channel 0 -
// essentially, just connection.close. That, combined
// with the restrictions on pipelining, mean that
// we're OK here to handle channel 0 traffic in a
// quiescing situation, even though technically we
// should be ignoring everything except
// connection.close-ok.
m_session0.HandleFrame(frame);
}
else
{
// If we're still m_running, but have a m_closeReason,
// then we must be quiescing, which means any inbound
// frames for non-zero channels (and any inbound
// commands on channel zero that aren't
// Connection.CloseOk) must be discarded.
if (m_closeReason == null)
{
// No close reason, not quiescing the
// connection. Handle the frame. (Of course, the
// Session itself may be quiescing this particular
// channel, but that's none of our concern.)
ISession session = m_sessionManager.Lookup(frame.Channel);
if (session == null)
{
throw new ChannelErrorException(frame.Channel);
}
else
{
session.HandleFrame(frame);
}
}
}
}
private void ReceiveLoop()
{
while (!_closed)
{
InboundFrame frame = _frameHandler.ReadFrame();
NotifyHeartbeatListener();
bool shallReturn = true;
if (frame.Channel == 0)
{
if (frame.Type == FrameType.FrameHeartbeat)
{
// Ignore it: we've already just reset the heartbeat
}
else
{
// In theory, we could get non-connection.close-ok
// frames here while we're quiescing (m_closeReason !=
// null). In practice, there's a limited number of
// things the server can ask of us on channel 0 -
// essentially, just connection.close. That, combined
// with the restrictions on pipelining, mean that
// we're OK here to handle channel 0 traffic in a
// quiescing situation, even though technically we
// should be ignoring everything except
// connection.close-ok.
shallReturn = _session0.HandleFrame(in frame);
}
}
else
{
// If we're still m_running, but have a m_closeReason,
// then we must be quiescing, which means any inbound
// frames for non-zero channels (and any inbound
// commands on channel zero that aren't
// Connection.CloseOk) must be discarded.
if (_closeReason is null)
{
// No close reason, not quiescing the
// connection. Handle the frame. (Of course, the
// Session itself may be quiescing this particular
// channel, but that's none of our concern.)
shallReturn = _sessionManager.Lookup(frame.Channel).HandleFrame(in frame);
}
}
if (shallReturn)
{
frame.ReturnPayload();
}
}
}
