/** connection is closing but a write has to be finished first */
private Receive ClosingWithPendingWrite(ConnectionInfo info, IActorRef closeCommandor,
Tcp.ConnectionClosed closedEvent)
{
return(message =>
{
if (message is Tcp.SuspendReading)
{
SuspendReading(info);
return true;
}
if (message is Tcp.ResumeReading)
{
ResumeReading(info);
return true;
}
if (message is SelectionHandler.ChannelReadable)
{
DoRead(info, closeCommandor);
return true;
}
if (message is SelectionHandler.ChannelWritable)
{
DoWrite(info);
if (!WritePending()) // writing is now finished
{
HandleClose(info, closeCommandor, closedEvent);
}
return true;
}
var updatePendingWrite = message as UpdatePendingWriteAndThen;
if (updatePendingWrite != null)
{
_pendingWrite = updatePendingWrite.RemainingWrite;
updatePendingWrite.Work();
if (WritePending())
{
info.Registration.EnableInterest(SocketAsyncOperation.Send);
}
else
{
HandleClose(info, closeCommandor, closedEvent);
}
return true;
}
var writeFailed = message as WriteFileFailed;
if (writeFailed != null)
{
HandleError(info.Handler, writeFailed.E); // rethrow exception from dispatcher task
return true;
}
if (message is Tcp.Abort)
{
HandleClose(info, Sender, IO.Tcp.Aborted.Instance);
return true;
}
return false;
});
}
private void HandleClose(ConnectionInfo info, IActorRef closeCommander, Tcp.ConnectionClosed closedEvent)
{
if (closedEvent is Tcp.Aborted)
{
if (_tcp.Settings.TraceLogging)
{
_log.Debug("Got Abort command. RESETing connection.");
}
DoCloseConnection(info.Handler, closeCommander, closedEvent);
return;
}
if (closedEvent is Tcp.PeerClosed && info.KeepOpenOnPeerClosed)
{
// report that peer closed the connection
info.Handler.Tell(IO.Tcp.PeerClosed.Instance);
// used to check if peer already closed its side later
_peerClosed = true;
Context.Become(PeerSentEOF(info));
return;
}
if (WritePending()) // finish writing first
{
if (_tcp.Settings.TraceLogging)
{
_log.Debug("Got Close command but write is still pending.");
}
Context.Become(ClosingWithPendingWrite(info, closeCommander, closedEvent));
return;
}
if (closedEvent is Tcp.ConfirmedClosed) // shutdown output and wait for confirmation
{
if (_tcp.Settings.TraceLogging)
{
_log.Debug("Got ConfirmedClose command, sending FIN.");
}
// If peer closed first, the socket is now fully closed.
// Also, if shutdownOutput threw an exception we expect this to be an indication
// that the peer closed first or concurrently with this code running.
if (_peerClosed || !SafeShutdownOutput())
{
DoCloseConnection(info.Handler, closeCommander, closedEvent);
}
else
{
Context.Become(Closing(info, closeCommander));
}
return;
}
// close now
if (_tcp.Settings.TraceLogging)
{
_log.Debug("Got Close command, closing connection.");
}
DoCloseConnection(info.Handler, closeCommander, closedEvent);
}
private void DoCloseConnection(IActorRef handler, IActorRef closeCommander, Tcp.ConnectionClosed closedEvent)
{
if (closedEvent is Tcp.Aborted)
{
Abort();
}
else
{
_channel.Close();
}
StopWith(new CloseInformation(new HashSet <IActorRef>(new[] { handler, closeCommander }.Where(x => x != null)), closedEvent));
}