private void ConfigureServiceHostWorkerRole(IExtensibleCloudServiceComponent ownerRole)
{
var callToken = TraceManager.WorkerRoleComponent.TraceIn(ownerRole != null ? ownerRole.GetType().FullName : null);
var startScopeCreateServiceHosts = TraceManager.WorkerRoleComponent.TraceStartScope(TraceLogMessages.ScopeCreateServiceHosts, callToken);
if (ownerRole != null)
{
IList <ServiceBusHostWorkerRoleAttribute> serviceHostAttributes = FrameworkUtility.GetDeclarativeAttributes <ServiceBusHostWorkerRoleAttribute>(ownerRole.GetType());
IRoleConfigurationSettingsExtension roleConfigExtension = ownerRole.Extensions.Find <IRoleConfigurationSettingsExtension>();
if (serviceHostAttributes != null && serviceHostAttributes.Count > 0 && roleConfigExtension != null)
{
ServiceBusEndpointInfo endpointInfo = null;
ServiceBusListenerRegistration listenerInfo = null;
foreach (ServiceBusHostWorkerRoleAttribute serviceHostAttr in serviceHostAttributes)
{
endpointInfo = roleConfigExtension.GetServiceBusEndpoint(serviceHostAttr.ServiceBusEndpoint);
if (endpointInfo != null)
{
listenerInfo = new ServiceBusListenerRegistration()
{
ServiceType = serviceHostAttr.ServiceType,
EndpointInfo = endpointInfo,
AutoStart = serviceHostAttr.AutoStart
};
// All services that are enabled for auto-start will have their service hosts pre-initialized but not as yet openned.
if (listenerInfo.AutoStart)
{
TraceManager.WorkerRoleComponent.TraceInfo(TraceLogMessages.AboutToCreateServiceHost, listenerInfo.ServiceType.FullName, endpointInfo.Name, endpointInfo.ServiceNamespace, endpointInfo.ServicePath, endpointInfo.EndpointType);
listenerInfo.ServiceHost = new ReliableServiceBusHost <object>(ServiceBusHostFactory.CreateServiceBusHost(endpointInfo, listenerInfo.ServiceType), roleConfigExtension.CommunicationRetryPolicy);
}
this.serviceEndpoints.Add(endpointInfo, listenerInfo);
}
else
{
throw new CloudApplicationException(String.Format(CultureInfo.CurrentCulture, ExceptionMessages.SpecifiedServiceBusEndpointNotFound, serviceHostAttr.ServiceBusEndpoint, ServiceBusConfigurationSettings.SectionName));
}
}
}
}
TraceManager.WorkerRoleComponent.TraceEndScope(TraceLogMessages.ScopeCreateServiceHosts, startScopeCreateServiceHosts, callToken);
TraceManager.WorkerRoleComponent.TraceOut(callToken);
}
/// <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));
}
}
private void SubmitApplication(LoanApplicationData loanApp)
{
LoanApplicationProcess loanRequestActivity = new LoanApplicationProcess(loanApp.ApplicationID)
{
ApplicantID = loanApp.Ssn,
LoanApplicationSubmitted = DateTime.UtcNow
};
// Ensure the availability of required extensions, throw an exception if not available.
Global.WebRoleSingleton.Extensions.Demand <IActivityTrackingEventStreamExtension>();
Global.WebRoleSingleton.Extensions.Demand <IRulesEngineServiceClientExtension>();
IActivityTrackingEventStreamExtension trackingEventStream = Global.WebRoleSingleton.Extensions.Find <IActivityTrackingEventStreamExtension>();
IRulesEngineServiceClientExtension ruleEngineClient = Global.WebRoleSingleton.Extensions.Find <IRulesEngineServiceClientExtension>();
IRoleConfigurationSettingsExtension roleConfig = Global.WebRoleSingleton.Extensions.Find <IRoleConfigurationSettingsExtension>();
// Tells the event stream to invoke the BeginActivity operation.
trackingEventStream.BeginActivity(loanRequestActivity);
// Call BRE rule to obtain a pre-approval.
SimpleValueFact result = ruleEngineClient.ExecutePolicy <SimpleValueFact>("Contoso.Cloud.Integration.Demo.LoanPreapproval", loanApp);
// Update the LoanPreapprovalReceived milestone.
loanRequestActivity.LoanPreapprovalDecision = Convert.ToString(result.Value);
loanRequestActivity.LoanPreapprovalReceived = DateTime.UtcNow;
// Display pre-approval decision.
SetResultDisplay(loanRequestActivity.LoanPreapprovalDecision);
// Tells the event stream to invoke the UpdateActivity.
trackingEventStream.UpdateActivity(loanRequestActivity);
// Submit pre-approved loan for final processing.
if (String.Compare(loanRequestActivity.LoanPreapprovalDecision, "Preapproved", true) == 0)
{
// Submit the loan application for processing (this will update LoanApplicationStarted, LoanFinalDecision and LoanFinalDecisionMade milestones.
using (var loanProcessor = new ReliableServiceBusClient <ILoanApplicationProcessingServiceChannel>(roleConfig.GetServiceBusEndpoint("LoanApplication"), roleConfig.CommunicationRetryPolicy))
{
loanProcessor.RetryPolicy.ExecuteAction(() =>
{
loanProcessor.Client.Submit(loanApp);
});
}
}
// Update the LoanFinalDecisionReceived milestone.
loanRequestActivity.LoanFinalDecisionReceived = DateTime.UtcNow;
// Tells the event stream to invoke the UpdateActivity and EndActivity operations.
trackingEventStream.CompleteActivity(loanRequestActivity);
}
