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Building Scalable Windows and .NET Apps

on AWS

Norm Johanson & Jim Flanagan / AWS Developer Resources

November 15, 2013

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

AWS Tools for the .NET Community

• AWS SDK for .NET

• AWS Tools for Windows PowerShell

• AWS Toolkit for Visual Studio

• AWS Elastic Beanstalk Container

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

Application Architecture

CloudShotz

S3 Bucket

DynamoDB Table

{user123, image456}

How DynamoDB Works

• Data is stored in Tables

• Tables do not have a fixed schema

• Tables have provisioned throughput

DynamoDB Keys

UserId ImageId S3Bucket S3Key

123 456 My-images Images/456

Hash Key Range Key Attributes

Key

DynamoDB Provisioned Throughput

Ima

ge

: W

ikim

edia

Com

mo

ns

Throttling

Consumed Capacity

0

1

2

3

4

5

6

7

Throttled Requests

0

100

200

300

400

500

600

DynamoDB and the .NET SDK

• Low-level DynamoDB API – 1:1 API Mapping

• Document-Based API – Key-value Dictionary

• Object-Persistence API – Annotated Classes

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-dd\\THH:mm:ss.fff\\Z")}},

{"Bucket", new AttributeValue {S = bucketName}},

{"S3Key", new AttributeValue {S = s3Key}}

}

};

PutItemResponse putResponse = this.ddbClient.PutItem(putRequest);

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);

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);

Amazon S3

• Unlimited Internet storage

• Keys grouped by bucket

• Objects are URL addressable

AWS Elastic Beanstalk

• Easy deployment management

• Creates all necessary AWS resources

• You retain full control

• Deploy .NET applications from Visual Studio

IAM Roles

my-s3-bucket

✔

✔

s3:GetObject

s3:PutObject

ImageMetadata

✔

✔

dynamodb:GetItem

Dynamodb:PutItem

Action Resource

EC2 Instance Profiles

EC2 Instance

AWS SDK

Identity and

Access

Management

EC2

Instance

Profile

✖

✔

Web.config

Instance Profile

SDK looks in

multiple places

for credentials

Adding an Image Processing Worker

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

DynamoDB Table

Adding an Image Processing Worker

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Adding an Image Processing Worker

Image Resizer Svc

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Worker Reads from queue

Adding an Image Processing Worker

Image Resizer Svc

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Worker gets image metadata

from DynamoDB

Adding an Image Processing Worker

Image Resizer Svc

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Worker downloads full-size

image from S3 bucket

Adding an Image Processing Worker

Image Resizer Svc

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Worker resizes image and

puts thumbnail in S3 bucket

Adding an Image Processing Worker

Image Resizer Svc

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Worker updates image metadata

In DynamoDB

Adding an Image Processing Worker

Image Resizer Svc

CloudShotz

Elastic Beanstalk

Environment

S3 Bucket

Queue

DynamoDB Table

Worker removes message from

queue

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

SDK Install Layout

Visual Studio Project Setup

Credential Management

• Do not embed access credentials

• Web identity federation – Supports Facebook, Google, and Amazon

• Token Vending Machine

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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