private void DoReceive(ChannelRegistration registration, IActorRef handler)
{
Action <int, ByteBuffer> innerReceive = null;
innerReceive = (readsLeft, buffer) =>
{
buffer.Clear();
buffer.Limit(_udp.Setting.DirectBufferSize);
var sender = Channel.Receive(buffer);
if (sender != null)
{
buffer.Flip();
handler.Tell(new Udp.Received(ByteString.Create(buffer), sender));
if (readsLeft > 0)
{
innerReceive(readsLeft - 1, buffer);
}
}
};
var buffr = _udp.BufferPool.Acquire();
try
{
innerReceive(_udp.Setting.BatchReceiveLimit, buffr);
}
finally
{
_udp.BufferPool.Release(buffr);
registration.EnableInterest(SocketAsyncOperation.Receive);
}
}
private void DoRead(ChannelRegistration registration, IActorRef handler)
{
Action <int, ByteBuffer> innerRead = null;
innerRead = (readsLeft, buffer) =>
{
buffer.Clear();
buffer.Limit(_udpConn.Settings.DirectBufferSize);
if (_channel.Read(buffer) > 0)
{
buffer.Flip();
handler.Tell(new UdpConnected.Received(ByteString.Create(buffer)));
innerRead(readsLeft - 1, buffer);
}
};
var buffr = _udpConn.BufferPool.Acquire();
try
{
innerRead(_udpConn.Settings.BatchReceiveLimit, buffr);
}
finally
{
registration.EnableInterest(SocketAsyncOperation.Receive);
_udpConn.BufferPool.Release(buffr);
}
}
private void Register(EndPoint address, ChannelRegistration registration)
{
ReportConnectFailure(() =>
{
Log.Debug("Attempting connection to [{0}]", address);
if (Channel.Connect(address))
{
CompleteConnect(registration, _commander, _connect.Options);
}
else
{
registration.EnableInterest(SocketAsyncOperation.Connect);
Become(Connecting(registration, Tcp.Settings.FinishConnectRetries));
}
});
}
private void DoSend(ChannelRegistration registration)
{
var buffer = Udp.BufferPool.Acquire();
try
{
buffer.Clear();
_pendingSend.Payload.CopyToBuffer(buffer);
buffer.Flip();
var writtenBytes = Channel.Send(buffer, _pendingSend.Target);
if (Udp.Setting.TraceLogging)
{
_log.Debug("Wrote [{0}] bytes to channel", writtenBytes);
}
// Datagram channel either sends the whole message, or nothing
if (writtenBytes == 0)
{
if (_retriedSend)
{
_pendingCommander.Tell(new Udp.CommandFailed(_pendingSend));
_retriedSend = false;
_pendingSend = null;
_pendingCommander = null;
}
else
{
registration.EnableInterest(SocketAsyncOperation.Send);
_retriedSend = true;
}
}
else
{
if (_pendingSend.WantsAck)
{
_pendingCommander.Tell(_pendingSend.Ack);
}
_retriedSend = false;
_pendingSend = null;
_pendingCommander = null;
}
}
finally
{
Udp.BufferPool.Release(buffer);
}
}
private Receive ReadHandlers(ChannelRegistration registration)
{
return(message =>
{
if (message is Udp.SuspendReading)
{
registration.DisableInterest(SocketAsyncOperation.Receive);
return true;
}
if (message is Udp.ResumeReading)
{
registration.EnableInterest(SocketAsyncOperation.Receive);
return true;
}
if (message is SelectionHandler.ChannelReadable)
{
DoReceive(registration, _bind.Handler);
return true;
}
if (message is Udp.Unbind)
{
_log.Debug("Unbinding endpoint [{0}]", _bind.LocalAddress);
try
{
Channel.Close();
Sender.Tell(IO.Udp.Unbound.Instance);
_log.Debug("Unbound endpoint [{0}], stopping listener", _bind.LocalAddress);
}
finally
{
Context.Stop(Self);
}
return true;
}
return false;
});
}
private Receive Connected(ChannelRegistration registration)
{
return(message =>
{
if (message is UdpConnected.SuspendReading)
{
registration.DisableInterest(SocketAsyncOperation.Receive);
return true;
}
if (message is UdpConnected.ResumeReading)
{
registration.EnableInterest(SocketAsyncOperation.Receive);
return true;
}
if (message is SelectionHandler.ChannelReadable)
{
DoRead(registration, _connect.Handler);
return true;
}
if (message is UdpConnected.Disconnect)
{
_log.Debug("Closing UDP connection to [{0}]", _connect.RemoteAddress);
_channel.Close();
Sender.Tell(UdpConnected.Disconnected.Instance);
_log.Debug("Connection closed to [{0}], stopping listener", _connect.RemoteAddress);
Context.Stop(Self);
return true;
}
var send = message as UdpConnected.Send;
if (send != null && WritePending)
{
if (_udpConn.Settings.TraceLogging)
{
_log.Debug("Dropping write because queue is full");
}
Sender.Tell(new UdpConnected.CommandFailed(send));
return true;
}
if (send != null && send.Payload.IsEmpty)
{
if (send.WantsAck)
{
Sender.Tell(send.Ack);
}
return true;
}
if (send != null)
{
_pendingSend = Tuple.Create(send, Sender);
registration.EnableInterest(SocketAsyncOperation.Send);
return true;
}
if (message is SelectionHandler.ChannelWritable)
{
DoWrite();
return true;
}
return false;
});
}