public static async Task Run([ServiceBusTrigger("createordertopic", "CreateOrder", AccessRights.Listen,
Connection = "ServiceBusConnectionString")] string topicMessage,
TraceWriter log)
{
var topicClient = new Microsoft.Azure.ServiceBus.TopicClient(Environment.GetEnvironmentVariable("ServiceBusConnectionString"),
Environment.GetEnvironmentVariable("CheckInventoryTopicName"));
try
{
if (string.IsNullOrEmpty(topicMessage))
{
throw new Exception("Service Bus Topic Message is null or empty");
}
var order = JsonConvert.DeserializeObject <Order>(topicMessage);
if (order == null)
{
throw new Exception("Order is missing");
}
if (order.Customer == null)
{
throw new Exception("Order is missing Customer information");
}
if (order.Products == null)
{
throw new Exception("Order is missing Product information");
}
if (order.Payment == null)
{
throw new Exception("Order is missing Payment information");
}
order.Status = "Created";
order.CreatedDate = DateTime.UtcNow;
order.UpdatedDate = DateTime.UtcNow;
await InsertOrder(order);
var message = new Message(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(order)));
message.MessageId = Guid.NewGuid().ToString();
await topicClient.SendAsync(message);
log.Info($"CreateOrder function processed message successfully: {topicMessage}");
}
catch (Exception ex)
{
log.Error($"CreateOrder function Failed. Exception: {ex.Message}");
}
finally
{
await topicClient.CloseAsync();
}
}
public static async Task Run([ServiceBusTrigger("checkinventorytopic", "CheckOrderInventory", AccessRights.Listen,
Connection = "ServiceBusConnectionString")] string topicMessage, TraceWriter log)
{
var topicClient = new Microsoft.Azure.ServiceBus.TopicClient(Environment.GetEnvironmentVariable("ServiceBusConnectionString"),
Environment.GetEnvironmentVariable("InventoryCheckedTopicName"));
try
{
if (string.IsNullOrEmpty(topicMessage))
{
log.Info($"ServiceBus topic message is null or empty.");
return;
}
var order = JsonConvert.DeserializeObject <Order>(topicMessage);
if (order.Payment == null)
{
throw new Exception("Order is missing Payment information.");
}
var isInventoryVerified = await IsInventoryVerified(order);
Message message = new Message();
if (isInventoryVerified)
{
order.Status = "Inventory Verified";
order.UpdatedDate = DateTime.UtcNow;
message.MessageId = Guid.NewGuid().ToString();
message.CorrelationId = "Verified";
}
else
{
order.Status = "Insufficient Inventory";
order.UpdatedDate = DateTime.UtcNow;
message.MessageId = Guid.NewGuid().ToString();
message.CorrelationId = "Insufficient";
log.Info($"Insufficient inventory to complete order.");
}
message.Body = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(order));
await topicClient.SendAsync(message);
log.Info($"CheckOrderInventory function processed message successfully: {topicMessage}");
}
catch (Exception ex)
{
log.Error($"CheckOrderInventory function Failed. Exception: {ex.Message}");
}
finally
{
await topicClient.CloseAsync();
}
}
public static async Task Run([ServiceBusTrigger("inventorycheckedtopic", "ProcessPayment",
AccessRights.Listen, Connection = "ServiceBusConnectionString")] string topicMessage, TraceWriter log)
{
var topicClient = new Microsoft.Azure.ServiceBus.TopicClient(Environment.GetEnvironmentVariable("ServiceBusConnectionString"),
Environment.GetEnvironmentVariable("PaymentProcessedTopicName"));
try
{
if (string.IsNullOrEmpty(topicMessage))
{
throw new Exception("ServiceBus topic message is null or empty.");
}
var order = JsonConvert.DeserializeObject <Order>(topicMessage);
var transaction = await InsertPaymentTransaction(order);
var paymentSucceeded = await Task.FromResult <bool>(PaymentSucceeded());
var message = new Message();
if (paymentSucceeded)
{
await UpdatePaymentTransaction(transaction, "Verified");
order.Status = "Payment Verified";
order.UpdatedDate = DateTime.UtcNow;
message.MessageId = Guid.NewGuid().ToString();
message.CorrelationId = "Verified";
}
else
{
await UpdatePaymentTransaction(transaction, "Failed");
order.Status = "Payment Failed";
order.UpdatedDate = DateTime.UtcNow;
message.MessageId = Guid.NewGuid().ToString();
message.CorrelationId = "Failed";
}
message.Body = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(order));
await topicClient.SendAsync(message);
log.Info($"ProcessOrderPayment function processed message successfully: {topicMessage}");
}
catch (Exception ex)
{
log.Error($"ProcessOrderPayment Failed. Exception: {ex.Message}");
}
finally
{
await topicClient.CloseAsync();
}
}
private void ATestTopicAndATestSubscription()
{
testTopicClient = new TopicClient(ServiceBusConnectionString, TopicName);
testSubscriptionClient = new SubscriptionClient(ServiceBusConnectionString, TopicName, SubscriptionName);
// create test subscription
namespaceManager = NamespaceManager.CreateFromConnectionString(ServiceBusConnectionString);
namespaceManager.CreateSubscription(TopicName, TEST_MESSAGE_SUB);
options = new OnMessageOptions()
{
AutoComplete = false, AutoRenewTimeout = TimeSpan.FromMinutes(1),
};
}
/// <inheritdoc />
public async Task SendAsync <TMessage>(TMessage message) where TMessage : IBusTopicMessage
{
if (string.IsNullOrEmpty(message.TopicName))
{
throw new ApplicationException("Topic name is mandatory");
}
var client = new Microsoft.Azure.ServiceBus.TopicClient(new ServiceBusConnectionStringBuilder(_connectionString)
{
EntityPath = message.TopicName
});
var serviceBusMessage = _messageFactory.CreateMessage(message);
await client.SendAsync(serviceBusMessage);
await client.CloseAsync();
}
public static TopicClient Create(ServiceBusEntityConnection entityConnection)
{
return(TopicClient.Create(entityConnection, ReceiveMode.PeekLock));
}