Question:
In a microservice architecture, you have an Azure function that needs to send messages to multiple subscribers. The subscribers then process these messages in their own time. How would you design this system? Fill in the triggers and bindings in the following code:
[FunctionName("BroadcastMessage")]
public static void Run(
/* Triggers and Bindings here */
ILogger log)
{
// Process the incoming message, if necessary
// Prepare the output message
// The output message is automatically sent for the subscribers to read later
}
Answer:
In this microservice architecture, the Azure function could use the Service Bus topic to send messages to multiple subscribers. Each subscriber could listen to the topic and process the message in their own time. This way, the Azure function doesn't need to know about the subscribers and the subscribers can process messages independently.
[FunctionName("BroadcastMessage")]
public static void Run(
[ServiceBusTrigger("<topic-name>", "<subscription-name>", Connection = "ServiceBusConnectionString")]
Message inputMessage,
[ServiceBus("<output-topic-name>", Connection = "ServiceBusConnectionString")]
out Message outputMessage,
ILogger log)
{
// Process the incoming message, if necessary
// Prepare the output message
// The output message is automatically sent for the subscribers to read later
}