public bool SendHandshake(AeronHandshakeRequest handshakeRequest, int connectionResponseTimeoutMs)
{
using var handshakeRequestStream = new MemoryStream();
Serializer.SerializeWithLengthPrefix(handshakeRequestStream, handshakeRequest, PrefixStyle.Base128);
_buffer.Wrap(handshakeRequestStream.GetBuffer(), 0, (int)handshakeRequestStream.Length);
var spinWait = new SpinWait();
var stopwatch = Stopwatch.StartNew();
while (true)
{
var errorCode = _publication.Offer(_buffer,
0,
(int)handshakeRequestStream.Length,
(buffer, offset, length) => (long)new AeronReservedValue(Utils.CurrentProtocolVersion,
AeronMessageType.Connected,
0));
if (errorCode == Publication.NOT_CONNECTED)
{
// This will happen as we just created the publication - we need to wait for Aeron to do its stuff
if (stopwatch.ElapsedMilliseconds > connectionResponseTimeoutMs)
{
_log.Error($"Failed to send handshake (not connected): {this}");
return(false);
}
spinWait.SpinOnce();
continue;
}
var result = Utils.InterpretPublicationOfferResult(errorCode);
if (result == AeronResultType.Success)
{
break;
}
if (result == AeronResultType.ShouldRetry)
{
spinWait.SpinOnce();
continue;
}
_log.Error($"Failed to send handshake: {this}");
return(false);
}
_buffer.Release();
return(true);
}
public int Connect(string serverHost,
int serverPort,
Action onConnectedDelegate,
Action onDisconnectedDelegate,
AeronClientMessageReceivedHandler onMessageReceived,
int connectionResponseTimeoutMs)
{
if (serverHost == null)
{
throw new ArgumentNullException(nameof(serverHost));
}
if (_isTerminatedUnexpectedly)
{
return(-1);
}
string serverHostIp;
if (serverHost.Equals("localhost", StringComparison.OrdinalIgnoreCase) || serverHost.Equals("127.0.0.1", StringComparison.OrdinalIgnoreCase))
{
// TODO IPC channel for local communication
serverHostIp = "127.0.0.1";
}
else
{
var ipv4 =
Dns.GetHostEntry(serverHost).AddressList
.FirstOrDefault(x => x.AddressFamily == AddressFamily.InterNetwork)
?? throw new ArgumentException($"Cannot resolve serverHost ip for {serverHost}");
serverHostIp = ipv4.ToString();
}
var serverChannel = Utils.RemoteChannel(serverHostIp, serverPort);
var publication = _client.AddExclusivePublication(serverChannel, AeronServer.ServerStreamId);
var localIp = UdpUtils.GetLocalIPAddress(serverHostIp, serverPort);
var streamId = MachineCounters.Instance.GetNewClientStreamId();
GetChannelAndSubscription(localIp, streamId, out var clientChannel, out var subscription);
var session = new AeronClientSession(this,
serverChannel,
publication,
subscription,
onConnectedDelegate,
onDisconnectedDelegate,
onMessageReceived);
var connectionId = AddSession(session);
_log.Info($"Connecting: {session}");
var handshakeRequest = new AeronHandshakeRequest
{
Channel = clientChannel,
StreamId = streamId
};
if (!session.SendHandshake(handshakeRequest, connectionResponseTimeoutMs))
{
RemoveSession(session);
session.Dispose();
return(-1);
}
return(connectionId);
}
