private async Task CreateTopic(ServiceBusConnectionContext connectionContext, int topicIndex)
{
await ServiceBusConnectionContext.TopicClientsLock.WaitAsync();
try
{
if (connectionContext.IsDisposed)
{
return;
}
string topicName = connectionContext.TopicNames[topicIndex];
if (!await _namespaceManager.TopicExistsAsync(topicName))
{
try
{
_trace.TraceInformation("Creating a new topic {0} in the service bus...", topicName);
await _namespaceManager.CreateTopicAsync(topicName);
_trace.TraceInformation(
"Creation of a new topic {0} in the service bus completed successfully.", topicName);
}
catch (MessagingEntityAlreadyExistsException)
{
// The entity already exists
_trace.TraceInformation(
"Creation of a new topic {0} threw an MessagingEntityAlreadyExistsException.", topicName);
}
}
// Create a client for this topic
TopicClient topicClient = new TopicClient(_connectionString, topicName, _configuration.RetryPolicy ?? RetryExponential.Default);
//if (_configuration.RetryPolicy != null)
//{
// topicClient.RetryPolicy = ;
//}
//else
//{
// topicClient.RetryPolicy = .RetryPolicy = ;
//}
connectionContext.SetTopicClients(topicClient, topicIndex);
_trace.TraceInformation("Creation of a new topic client {0} completed successfully.", topicName);
}
finally
{
ServiceBusConnectionContext.TopicClientsLock.Release();
}
//CreateSubscription(connectionContext, topicIndex);
}
public async Task Subscribe(ServiceBusConnectionContext connectionContext)
{
if (connectionContext == null)
{
throw new ArgumentNullException("connectionContext");
}
_trace.TraceInformation("Subscribing to {0} topic(s) in the service bus...", connectionContext.TopicNames.Count);
connectionContext.NamespaceManager = _namespaceManager;
for (var topicIndex = 0; topicIndex < connectionContext.TopicNames.Count; ++topicIndex)
{
await Retry(() => CreateTopic(connectionContext, topicIndex));
}
_trace.TraceInformation("Subscription to {0} topics in the service bus Topic service completed successfully.", connectionContext.TopicNames.Count);
}
public ServiceBusMessageBus(IDependencyResolver resolver, ServiceBusScaleoutConfiguration configuration)
: base(resolver, configuration)
{
if (configuration == null)
{
throw new ArgumentNullException("configuration");
}
// Retrieve the trace manager
var traceManager = resolver.Resolve <ITraceManager>();
_trace = traceManager["SignalR." + nameof(ServiceBusMessageBus)];
_connection = new ServiceBusConnection(configuration, _trace);
_topics = Enumerable.Range(0, configuration.TopicCount)
.Select(topicIndex => SignalRTopicPrefix + "_" + configuration.TopicPrefix + "_" + topicIndex)
.ToArray();
_connectionContext = new ServiceBusConnectionContext(configuration, _topics, _trace, OnMessage, OnError, Open);
Subscribe().GetAwaiter().GetResult();
}
