private async Task <ClusterMaintenanceConnection> ConnectToClientNodeAsync(TcpConnectionInfo tcpConnectionInfo, TimeSpan timeout)
{
TcpConnectionHeaderMessage.SupportedFeatures supportedFeatures;
TcpClient tcpClient;
string url;
(tcpClient, url) = await TcpUtils.ConnectSocketAsync(tcpConnectionInfo, timeout, _log);
var connection = await TcpUtils.WrapStreamWithSslAsync(tcpClient, tcpConnectionInfo, _parent._server.Server.Certificate.Certificate, timeout);
using (_contextPool.AllocateOperationContext(out JsonOperationContext ctx))
using (var writer = new BlittableJsonTextWriter(ctx, connection))
{
var parameters = new TcpNegotiateParameters
{
Database = null,
Operation = TcpConnectionHeaderMessage.OperationTypes.Heartbeats,
Version = TcpConnectionHeaderMessage.HeartbeatsTcpVersion,
ReadResponseAndGetVersionCallback = SupervisorReadResponseAndGetVersion,
DestinationUrl = url,
DestinationNodeTag = ClusterTag
};
supportedFeatures = TcpNegotiation.NegotiateProtocolVersion(ctx, connection, parameters);
WriteClusterMaintenanceConnectionHeader(writer);
}
return(new ClusterMaintenanceConnection
{
TcpClient = tcpClient,
Stream = connection,
SupportedFeatures = supportedFeatures
});
}
private void WriteHeaderToRemotePeer()
{
using (_database.DocumentsStorage.ContextPool.AllocateOperationContext(out DocumentsOperationContext documentsContext))
using (var writer = new BlittableJsonTextWriter(documentsContext, _stream))
{
var parameters = new TcpNegotiateParameters
{
Database = Destination.Database,
Operation = TcpConnectionHeaderMessage.OperationTypes.Replication,
SourceNodeTag = _parent._server.NodeTag,
DestinationNodeTag = GetNode(),
DestinationUrl = Destination.Url,
ReadResponseAndGetVersionCallback = ReadHeaderResponseAndThrowIfUnAuthorized,
Version = TcpConnectionHeaderMessage.ReplicationTcpVersion
};
//This will either throw or return acceptable protocol version.
SupportedFeatures = TcpNegotiation.NegotiateProtocolVersion(documentsContext, _stream, parameters);
if (SupportedFeatures.ProtocolVersion <= 0)
{
throw new InvalidOperationException(
$"{OutgoingReplicationThreadName}: TCP negotiation resulted with an invalid protocol version:{SupportedFeatures.ProtocolVersion}");
}
//start request/response for fetching last etag
var request = new DynamicJsonValue
{
["Type"] = "GetLastEtag",
[nameof(ReplicationLatestEtagRequest.SourceDatabaseId)] = _database.DbId.ToString(),
[nameof(ReplicationLatestEtagRequest.SourceDatabaseName)] = _database.Name,
[nameof(ReplicationLatestEtagRequest.SourceUrl)] = _parent._server.GetNodeHttpServerUrl(),
[nameof(ReplicationLatestEtagRequest.SourceTag)] = _parent._server.NodeTag,
[nameof(ReplicationLatestEtagRequest.SourceMachineName)] = Environment.MachineName
};
documentsContext.Write(writer, request);
writer.Flush();
}
}
