public async Task <ConnectionDescription> SendHelloAsync(IConnection connection, CancellationToken cancellationToken)
{
Ensure.IsNotNull(connection, nameof(connection));
var authenticators = GetAuthenticators(connection.Settings);
var helloCommand = CreateInitialHelloCommand(authenticators, connection.Settings.LoadBalanced);
var helloProtocol = HelloHelper.CreateProtocol(helloCommand, _serverApi);
var helloResult = await HelloHelper.GetResultAsync(connection, helloProtocol, cancellationToken).ConfigureAwait(false);
if (connection.Settings.LoadBalanced && !helloResult.ServiceId.HasValue)
{
throw new InvalidOperationException("Driver attempted to initialize in load balancing mode, but the server does not support this mode.");
}
return(new ConnectionDescription(connection.ConnectionId, helloResult));
}
public async Task <ConnectionDescription> InitializeConnectionAsync(IConnection connection, CancellationToken cancellationToken)
{
Ensure.IsNotNull(connection, nameof(connection));
var authenticators = connection.Settings.AuthenticatorFactories.Select(f => f.Create()).ToList();
var helloCommand = CreateInitialHelloCommand(authenticators);
var helloProtocol = HelloHelper.CreateProtocol(helloCommand, _serverApi);
var helloResult = await HelloHelper.GetResultAsync(connection, helloProtocol, cancellationToken).ConfigureAwait(false);
var buildInfoProtocol = CreateBuildInfoProtocol(_serverApi);
var buildInfoResult = new BuildInfoResult(await buildInfoProtocol.ExecuteAsync(connection, cancellationToken).ConfigureAwait(false));
var description = new ConnectionDescription(connection.ConnectionId, helloResult, buildInfoResult);
await AuthenticationHelper.AuthenticateAsync(connection, description, authenticators, cancellationToken).ConfigureAwait(false);
var connectionIdServerValue = helloResult.ConnectionIdServerValue;
if (connectionIdServerValue.HasValue)
{
description = UpdateConnectionIdWithServerValue(description, connectionIdServerValue.Value);
}
else
{
try
{
var getLastErrorProtocol = CreateGetLastErrorProtocol(_serverApi);
var getLastErrorResult = await getLastErrorProtocol
.ExecuteAsync(connection, cancellationToken)
.ConfigureAwait(false);
description = UpdateConnectionIdWithServerValue(description, getLastErrorResult);
}
catch
{
// if we couldn't get the server's connection id, so be it.
}
}
return(description);
}