Adding multiple messages to a queue using the IAsyncCollector function

In the Saving profile picture paths to queues using queue output bindings recipe of Chapter 1, Accelerating cloud app development using Azure Functions, you learned how to create a queue message for each request coming from the HTTP request. Now let's assume that each user is registering their devices using client applications (such as desktop apps, mobile apps, or any client websites) that can send multiple records in a single request. In these cases, the back-end application should be smart enough to handle the oncoming load; there should be a mechanism to create multiple queue messages at once and asynchronously. You will learn how to create multiple queue messages using the IAsyncCollector interface.

Let's look at a diagram that depicts the data flow from different client applications to the Back-End Web API.

At a given point of time, as shown in Figure 10.1:

• iOS App sends two messages...