The AWS SDK for .NET and the AWS Toolkit for Visual Studio help developers build scalable apps on AWS services. Learn how to use these tools to define app data in Amazon DynamoDB and access it through a simple object persistence framework. We demonstrate deploying a web app to a customized, auto-scaled AWS Elastic Beanstalk environment. Finally, using the new version of the AWS SDK for .NET, you learn how to access your AWS data from apps targeting the Windows Store and Windows Phone platforms.

1. Building Scalable Windows and .NET Apps
on AWS
Norm Johanson & Jim Flanagan / AWS Developer Resources
November 15, 2013
© 2013 Amazon.com, Inc. and its affiliates. All rights reserved. May not be copied, modified, or distributed in whole or in part without the express consent of Amazon.com, Inc.

2. What We’ll Learn
•
•
•
•
Using Amazon DynamoDB with .NET
Deploying to AWS Elastic Beanstalk
Customizing Our Beanstalk Environments
Using Our SDK for Windows Store Applications

3. AWS Tools for the .NET Community
•
•
•
•
AWS SDK for .NET
AWS Tools for Windows PowerShell
AWS Toolkit for Visual Studio
AWS Elastic Beanstalk Container

4. AWS Tools for the .NET Community
• AWS SDK for .NET – Version 2
– Supports WinRT and Windows Phone 8
• AWS Toolkit for Visual Studio
– Supports Visual Studio 2010, 2012, and 2013
• AWS Elastic Beanstalk Container
– Container customization
– Instance Profiles
– Single Instance Environments

5. Application Architecture
S3 Bucket
CloudShotz
{user123, image456}
DynamoDB Table

6. How DynamoDB Works
• Data is stored in Tables
• Tables do not have a fixed schema
• Tables have provisioned throughput

7. DynamoDB Keys
Hash Key
Range Key
Attributes
UserId
ImageId
S3Bucket
S3Key
123
456
My-images
Images/456
Key

8. Image: Wikimedia Commons
DynamoDB Provisioned Throughput

9. Throttling
Consumed Capacity
Throttled Requests
7
600
6
500
5
4
3
2
400
300
200
1
100
0
0

10. DynamoDB and the .NET SDK
• Low-level DynamoDB API
– 1:1 API Mapping
• Document-Based API
– Key-value Dictionary
• Object-Persistence API
– Annotated Classes

11. Low Level API
PutItemRequest putRequest = new PutItemRequest() {
TableName = "ImageMetadata",
Item = new Dictionary<string, AttributeValue> {
{"UserId", new AttributeValue {S = userId}},
{"ImageId", new AttributeValue {S = Guid.NewGuid().ToString()}},
{"Caption", new AttributeValue {S = "Cool Photo"}},
{"UploadDate", new AttributeValue {
S = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:ss.fffZ")}},
{"Bucket", new AttributeValue {S = bucketName}},
{"S3Key", new AttributeValue {S = s3Key}}
}
};
PutItemResponse putResponse = this.ddbClient.PutItem(putRequest);

12. Document Model API
Table table = Table.LoadTable(this.ddbClient, "ImageMetadata");
Document document = new Document();
document["UserId"] = userId;
document["ImageId"] = Guid.NewGuid();
document["Caption"] = "Cool Photo";
document["UploadDate"] = DateTime.Now;
document["Bucket"] = bucketName;
document["S3Key"] = s3Key;
table.PutItem(document);

13. Object Persistence Model API
ImageMetadata image = new ImageMetadata(DateTime.Now, userId);
image.Caption = "Cool Photo";
image.S3Bucket = bucketName;
image.S3Key = s3Key;
context.Save<ImageMetadata>(image);

14. Amazon S3
• Unlimited Internet storage
• Keys grouped by bucket
• Objects are URL addressable

15. AWS Elastic Beanstalk
•
•
•
•
Easy deployment management
Creates all necessary AWS resources
You retain full control
Deploy .NET applications from Visual Studio

16. IAM Roles
Action
Resource
✔ s3:GetObject
✔ s3:PutObject
my-s3-bucket
✔ dynamodb:GetItem
✔ Dynamodb:PutItem
ImageMetadata

17. EC2 Instance Profiles
EC2
SDK looks in
multiple places
for credentials
Instance
Profile
AWS SDK
✖ Web.config
✔ Instance Profile
Identity and
Access
Management
EC2 Instance

18. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Elastic Beanstalk
Environment
DynamoDB Table

19. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Queue
Elastic Beanstalk
Environment
DynamoDB Table

20. Adding an Image Processing Worker
S3 Bucket
Worker Reads from queue
CloudShotz
Queue
Image Resizer Svc
Elastic Beanstalk
Environment
DynamoDB Table

21. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Queue
Image Resizer Svc
Elastic Beanstalk
Environment
DynamoDB Table
Worker gets image metadata
from DynamoDB

22. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Queue
Image Resizer Svc
Elastic Beanstalk
Environment
DynamoDB Table
Worker downloads full-size
image from S3 bucket

23. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Queue
Image Resizer Svc
Elastic Beanstalk
Environment
DynamoDB Table
Worker resizes image and
puts thumbnail in S3 bucket

24. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Queue
Image Resizer Svc
Elastic Beanstalk
Environment
DynamoDB Table
Worker updates image metadata
In DynamoDB

25. Adding an Image Processing Worker
S3 Bucket
CloudShotz
Queue
Image Resizer Svc
Elastic Beanstalk
Environment
DynamoDB Table
Worker removes message from
queue

26. Windows Store & Windows Phone
• New in version 2 of the SDK
• Asynchronous API only
• Service level support
– Windows Phone has 11 services
– Window Store supports all services
• Separate assemblies for each platform

27. SDK Install Layout

28. Visual Studio Project Setup

29. Credential Management
• Do not embed access credentials
• Web identity federation
– Supports Facebook, Google, and Amazon
• Token Vending Machine

30. What’s Next?
• Try out our SDK and Tools
– AWS Website - http://aws.amazon.com/sdkfornet/
– Nuget - https://www.nuget.org/packages/awssdk
– Open Source at GitHub - https://github.com/aws/aws-sdk-net
• Let us know what you think
– AWS Forums
– GitHub
– StackOverflow
• Follow our blog
http://blogs.aws.amazon.com/net/ (Twitter: @awsfornet)

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presentation
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