/// <summary>
/// Notifies this extension component that it has been registered in the owner's collection of extensions.
/// </summary>
/// <param name="owner">The extensible owner object that aggregates this extension.</param>
public void Attach(IExtensibleCloudServiceComponent owner)
{
owner.Extensions.Demand <IRoleConfigurationSettingsExtension>();
IRoleConfigurationSettingsExtension roleConfigExtension = owner.Extensions.Find <IRoleConfigurationSettingsExtension>();
this.serviceBusEndpoint = roleConfigExtension.GetServiceBusEndpoint(WellKnownEndpointName.InterRoleCommunication);
this.retryPolicy = roleConfigExtension.CommunicationRetryPolicy;
if (this.serviceBusEndpoint != null)
{
// Configure Service Bus credentials and entity URI.
var credentials = TransportClientCredentialBase.CreateSharedSecretCredential(this.serviceBusEndpoint.IssuerName, this.serviceBusEndpoint.IssuerSecret);
var address = ServiceBusEnvironment.CreateServiceUri(WellKnownProtocolScheme.ServiceBus, this.serviceBusEndpoint.ServiceNamespace, String.Empty);
// Configure Service Bus messaging factory and namespace client which is required for subscription management.
this.messagingFactory = MessagingFactory.Create(address, credentials);
this.managementClient = new ServiceBusNamespaceClient(address, credentials);
ConfigureTopicClient();
ConfigureSubscriptionClient(this.ircSubscription = ConfigureSubscription(String.Concat(SubscriptionNamePrefix, this.senderInstanceID)));
// Configure event receive action.
this.receiveAction = (() =>
{
BrokeredMessage msg = null;
this.retryPolicy.ExecuteAction(() =>
{
// Make sure we are not told to stop receiving while we are retrying.
if (!cts.IsCancellationRequested)
{
if (EventReceiver.TryReceive(Settings.EventWaitTimeout, out msg))
{
try
{
// Make sure we are not told to stop receiving while we were waiting for a new message.
if (!cts.IsCancellationRequested)
{
// Extract the event data from brokered message.
InterRoleCommunicationEvent e = msg.GetBody <InterRoleCommunicationEvent>();
// Notify all registered subscribers.
NotifySubscribers(e);
// Mark brokered message as complete.
msg.Complete(this.retryPolicy);
}
else
{
msg.Defer(this.retryPolicy);
}
}
catch (Exception ex)
{
// Abandons a brokered message and unlocks the message.
msg.Abandon(this.retryPolicy);
// Log an error.
TraceManager.ServiceComponent.TraceError(ex);
}
}
}
});
});
// Configure event receive complete action.
this.endReceive = ((ar) =>
{
this.receiveAction.EndInvoke(ar);
if (!cts.IsCancellationRequested)
{
this.receiveHandle = this.receiveAction.BeginInvoke(this.endReceive, null);
}
});
// Configure event send action.
this.sendAction = ((e) =>
{
this.retryPolicy.ExecuteAction(() => { EventSender.Send(e); });
});
// Configure event send complete action.
this.endSend = ((ar) =>
{
sendAction.EndInvoke(ar);
});
}
else
{
throw new CloudApplicationException(String.Format(CultureInfo.CurrentCulture, ExceptionMessages.SpecifiedServiceBusEndpointNotFound, WellKnownEndpointName.InterRoleCommunication, ServiceBusConfigurationSettings.SectionName));
}
}
