Azure Serverless Computing Cookbook

Creating Orchestrator function

1. Create a new Function named GenerateQRCode using the ManualTrigger-C#, replace the default code with the following code and click on the Save button to save the changes:

        #r "Microsoft.Azure.WebJobs.Extensions.DurableTask"        public static async Task<int> Run(DurableOrchestrationContext                   qrCodeContext)        {            int[] customers = await                      qrCodeContext.CallFunctionAsync<int[]>("GetAllCustomers");            var tasks = new Task<long>[customers.Length];            for (int nCustomerIndex = 0; nCustomerIndex <              customers.Length; nCustomerIndex++)            {               tasks[nCustomerIndex] =                 qrCodeContext.CallFunctionAsync<int>                ("CreateQRCodeImagesPerCustomer",                 customers[nCustomerIndex]);            }            await Task.WhenAll(tasks); int nTotalItems = tasks.Sum(item => item.Result); ...