Local coding instructions

• Make sure Azure Storage emulator is running

• Make sure CosmosDB emulator is running

• Create function with v1 and empty

• Add Nuget Package Microsoft.Azure.WebJobs.Extensions.DocumentDB v1.2.0

• Copy-paste in local settings file (where do you get Cosmos Connection string)

      {
        "IsEncrypted": false,
        "Values": {
          "AzureWebJobsStorage": "UseDevelopmentStorage=true",
          "AzureWebJobsDashboard": "UseDevelopmentStorage=true",
          "cosmosConnectionString": "AccountEndpoint=https://localhost:8081/;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw=="
        }
      }

• Add HTTP trigger

• Run -> Copy paste url in POSTMAN

• Walk through code and add message with "name"

• Show incoming data - one for CD and one for downloadable version

• Delete all code and add DocumentDB binding

      [DocumentDB(databaseName:"salesdb",collectionName:"salescollection",CreateIfNotExists = true,CollectionThroughput = 1000,PartitionKey = "/sku",ConnectionStringSetting = "cosmosConnectionString")] IAsyncCollector<dynamic> outputDocument,

• Add this code to body

    dynamic data = await req.Content.ReadAsAsync<object>();
    await outputDocument.AddAsync(data);
    return new HttpResponseMessage(HttpStatusCode.OK);

• Run with both examples of different schemes and show saved data

• Add Cosmos trigger function with salesdb, salescollection and cosmosConnectionString

• Add code

      if (documents != null && documents.Count > 0)
      {
        foreach (var document in documents)
        {
          if (((dynamic)document).requires_shipping)
            log.Warning("Invoked shipping function");
          else
            log.Warning("No shipping!!!!");
        }
      }

• Run, will fail, set leasecollection to autocreate and run again

• Post both orders, one will require shipping, other won't

• Add another function with cosmos trigger salesdb, salescollection and cosmosConnectionString

• Add code

    if (documents != null && documents.Count > 0)
    {
      foreach (var document in documents)
      {
        if (((dynamic)document).taxable)
        {
          var tax = ((dynamic)document).price * 0.07;
          log.Warning($"Calculated tax {tax}");
         }
         else
          log.Warning($"No tax!!!");
        }
      }

• Run, will fail, set leasecollection to autocreate and run again

• Only one will fire. Why? Show lease diagram where hosts and lease database interact

• create separate lease database for each and autocreatE