TechDays 2017 sessie 2 Jan de Vries

Creating real life serverless solutions with Azure Functions

Transcript

4. servers
5. Like PaaS
6. “If your PaaS can efficiently start instances in 20ms that run for half a second, then call it serverless.” Adrian Cockcroft - VP Cloud Architecture Strategy AWS
7. Keep It Small and Simple
9. URL Minification
10. GET minified URL redirect CREATE minified URL
11. CosmosDB
12. Oh yeah!
14. Web App CosmosDB
16. CosmosDB GET POST
17. CosmosDB GET POST Azure cache UPDATE Change Feed
18. CosmosDB GET POST Azure cache UPDATE Change Feed Queue TRIGGER
19. CosmosDB GET POST
20. Bindings are your friend
21. "bindings": [ { "type": "httpTrigger", "route": "{slug}", "methods": [ "get" ], "authLevel": "anonymous", "name": "req" } ], Function, User, System & Admin
22. "bindings": [ { "name": “minifiedUrl", "type": "documentDB", "databaseName": “MinifyRepository", "collectionName": “MinifiedUrls", "createIfNotExists": true, "connection": “CosmosDbConnection", "direction": "out" } ],
23. Don’t write JSON
25. Where to put the code
26. Existing patterns & principles still apply!
27. private readonly ICosmosClient cosmosClient; public CreateUrlHandler() { this.cosmosClient = new CosmosClient(); } public CreateUrlHandler(ICosmosClient cosmosClient) { this.cosmosClient = cosmosClient; }
29. CosmosDB GET POST
32. [FunctionName("Get")] public static async Task<HttpResponseMessage> Run( [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "{slug}")] HttpRequestMessage req, string slug, TraceWriter log) { var getUrl = new GetUrlHandler(); var minifiedUrl = await getUrl.Execute(slug); if (minifiedUrl == null) { return req.CreateErrorResponse(HttpStatusCode.NotFound, $"Minified value `{slug}` is not found."); } var response = req.CreateResponse(HttpStatusCode.Redirect); response.Headers.Location = new Uri(minifiedUrl.FullUrl); return response; }
33. public static class Create { [FunctionName("Create")] public static HttpResponseMessage Run( [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "create")] HttpRequestMessage req, [DocumentDB("datbaseName", "collectionName", PartitionKey = "MinifiedUrls", CreateIfNotExists = true, ConnectionStringSetting = "minifiedUrlConnectionString")] out dynamic minifiedUrl, TraceWriter log) { string jsonContent = req.Content.ReadAsStringAsync().Result; var data = JsonConvert.DeserializeObject<MinifiedUrl>(jsonContent); var create = new CreateUrlHandler(); minifiedUrl = create.Execute(data); return req.CreateResponse(HttpStatusCode.Created, $"api/{data.MinifiedSlug}"); } }
35. Easy mode
38. master branch to production
39. Pro mode
42. Check if you use slots Point to the correct package
46. https://my.jdv.li/api/minifiedurl or https://my.jdv.li/minifiedurl
47. { "$schema": "http://json.schemastore.org/proxies", "proxies": { "getminifiedredirect": { "matchCondition": { "methods": [ "GET" ], "route": "/{slug}" }, "backendUri": "https://%WEBSITE_HOSTNAME%/api/{slug}" } } } Matching conditions
48. https://github.com/Jandev/minifier @Jan_de_V jandv@4dotnet.nl https://jan-v.nl