OperationTimeout в AcceptMessageSessionAsync - это количество времени, в течение которого вызов должен ждать для получения следующего сеанса.
Здесь вы можете найти полную реализацию метода AcceptMessageSessionAsync
/// <summary>
/// Gets a particular session object identified by <paramref name="sessionId"/> that can be used to receive messages for that sessionId.
/// </summary>
/// <param name="sessionId">The sessionId present in all its messages.</param>
/// <param name="operationTimeout">Amount of time for which the call should wait to fetch the next session.</param>
/// <remarks>All plugins registered on <see cref="SessionClient"/> will be applied to each <see cref="MessageSession"/> that is accepted.
/// Individual sessions can further register additional plugins.</remarks>
public async Task<IMessageSession> AcceptMessageSessionAsync(string sessionId, TimeSpan operationTimeout)
{
this.ThrowIfClosed();
MessagingEventSource.Log.AmqpSessionClientAcceptMessageSessionStart(
this.ClientId,
this.EntityPath,
this.ReceiveMode,
this.PrefetchCount,
sessionId);
bool isDiagnosticSourceEnabled = ServiceBusDiagnosticSource.IsEnabled();
Activity activity = isDiagnosticSourceEnabled ? this.diagnosticSource.AcceptMessageSessionStart(sessionId) : null;
Task acceptMessageSessionTask = null;
var session = new MessageSession(
this.EntityPath,
this.EntityType,
this.ReceiveMode,
this.ServiceBusConnection,
this.CbsTokenProvider,
this.RetryPolicy,
this.PrefetchCount,
sessionId,
true);
try
{
acceptMessageSessionTask = this.RetryPolicy.RunOperation(
() => session.GetSessionReceiverLinkAsync(operationTimeout),
operationTimeout);
await acceptMessageSessionTask.ConfigureAwait(false);
}
catch (Exception exception)
{
if (isDiagnosticSourceEnabled)
{
this.diagnosticSource.ReportException(exception);
}
MessagingEventSource.Log.AmqpSessionClientAcceptMessageSessionException(
this.ClientId,
this.EntityPath,
exception);
await session.CloseAsync().ConfigureAwait(false);
throw AmqpExceptionHelper.GetClientException(exception);
}
finally
{
this.diagnosticSource.AcceptMessageSessionStop(activity, session.SessionId, acceptMessageSessionTask?.Status);
}
MessagingEventSource.Log.AmqpSessionClientAcceptMessageSessionStop(
this.ClientId,
this.EntityPath,
session.SessionIdInternal);
session.UpdateClientId(ClientEntity.GenerateClientId(nameof(MessageSession), $"{this.EntityPath}_{session.SessionId}"));
// Register plugins on the message session.
foreach (var serviceBusPlugin in this.RegisteredPlugins)
{
session.RegisterPlugin(serviceBusPlugin);
}
return session;
}
Полный образец можно найти по ссылке ниже
https://github.com/Azure/azure-service-bus-dotnet/blob/dev/src/Microsoft.Azure.ServiceBus/SessionClient.cs
Надеюсь, это поможет.