public static async Task <TcpConnectionHeaderMessage.SupportedFeatures> NegotiateProtocolVersionAsync(JsonOperationContext documentsContext, Stream stream, TcpNegotiateParamaters parameters)
{
using (var writer = new BlittableJsonTextWriter(documentsContext, stream))
{
var currentVersion = parameters.Version;
while (true)
{
if (parameters.CancellationToken.IsCancellationRequested)
{
throw new OperationCanceledException($"Stoped Tcp negotiation for {parameters.Operation} because of cancelation request");
}
documentsContext.Write(writer, new DynamicJsonValue
{
[nameof(TcpConnectionHeaderMessage.DatabaseName)] = parameters.Database, // _parent.Database.Name,
[nameof(TcpConnectionHeaderMessage.Operation)] = parameters.Operation.ToString(),
[nameof(TcpConnectionHeaderMessage.SourceNodeTag)] = parameters.NodeTag,
[nameof(TcpConnectionHeaderMessage.OperationVersion)] = currentVersion
});
writer.Flush();
int version;
if (parameters.ReadResponseAndGetVersionAsync == null)
{
version = parameters.ReadResponseAndGetVersion(documentsContext, writer, stream, parameters.Url);
}
else
{
version = await parameters.ReadResponseAndGetVersionAsync(documentsContext, writer, stream, parameters.Url, parameters.CancellationToken).ConfigureAwait(false);
}
//In this case we usally throw internaly but for completeness we better handle it
if (version == -2)
{
return(TcpConnectionHeaderMessage.GetSupportedFeaturesFor(TcpConnectionHeaderMessage.OperationTypes.Drop, TcpConnectionHeaderMessage.DropBaseLine40000));
}
var(supported, prevSupported) = TcpConnectionHeaderMessage.OperationVersionSupported(parameters.Operation, version);
if (supported)
{
//We are done
if (currentVersion == version)
{
return(TcpConnectionHeaderMessage.GetSupportedFeaturesFor(parameters.Operation, version));
}
//Here we support the requested version but need to inform the otherside we agree
currentVersion = version;
continue;
}
if (prevSupported == -1)
{
return(TcpConnectionHeaderMessage.GetSupportedFeaturesFor(TcpConnectionHeaderMessage.OperationTypes.None, TcpConnectionHeaderMessage.NoneBaseLine40000));
}
currentVersion = prevSupported;
}
}
}
public static TcpConnectionHeaderMessage.SupportedFeatures NegotiateProtocolVersion(JsonOperationContext documentsContext, Stream stream, TcpNegotiateParamaters parameters)
{
using (var writer = new BlittableJsonTextWriter(documentsContext, stream))
{
var currentVersion = parameters.Version;
while (true)
{
documentsContext.Write(writer, new DynamicJsonValue
{
[nameof(TcpConnectionHeaderMessage.DatabaseName)] = parameters.Database, // _parent.Database.Name,
[nameof(TcpConnectionHeaderMessage.Operation)] = parameters.Operation.ToString(),
[nameof(TcpConnectionHeaderMessage.SourceNodeTag)] = parameters.NodeTag,
[nameof(TcpConnectionHeaderMessage.OperationVersion)] = currentVersion
});
writer.Flush();
var version = parameters.ReadResponseAndGetVersion(documentsContext, writer, stream, parameters.Url);
//In this case we usally throw internaly but for completeness we better handle it
if (version == -2)
{
return(TcpConnectionHeaderMessage.GetSupportedFeaturesFor(TcpConnectionHeaderMessage.OperationTypes.Drop, TcpConnectionHeaderMessage.DropBaseLine40000));
}
var(supported, prevSupported) = TcpConnectionHeaderMessage.OperationVersionSupported(parameters.Operation, version);
if (supported)
{
//We are done
if (currentVersion == version)
{
return(TcpConnectionHeaderMessage.GetSupportedFeaturesFor(parameters.Operation, version));
}
//Here we support the requested version but need to inform the otherside we agree
currentVersion = version;
continue;
}
if (prevSupported == -1)
{
return(TcpConnectionHeaderMessage.GetSupportedFeaturesFor(TcpConnectionHeaderMessage.OperationTypes.None, TcpConnectionHeaderMessage.NoneBaseLine40000));
}
currentVersion = prevSupported;
}
}
}