jplock / appsync-chat-app-cdk Goto Github PK

This repo is part of an official AWS Blog post that showcases how to create a serverless, real-time backend that integrates with a frontend application.

The lib/authStack.ts file creates the following services

• Cognito user pool
• Cognito user pool group (if specified)
• Cognito identity pool

🗒️ The identity pool helps in providing IAM permission access to both authenticated and unauthenticated users as well as AWS services such as Amazon S3.

The lib/functions directory contains a postConfirmationTrigger folder. The Lambda function in this folder adds a user to DynamoDB after a user signs up through our Cognito service.

The lib/fileStorage.ts file creates an Amazon S3 bucket and comes configured with managed polices that are in line with what the Amplify Storage library uses as acceptable defaults.

Thelib/apiStack.ts file creates an AWS AppSync API that is based on a Todo application.

Note that this stack comes preconfigured with the following:

• A sample graphql schema
• User pool authorization
• API Key authorization
• IAM authorization
• DynamoDB as a datasource

In addition, this package makes use of the @aws-cdk/aws-appsync-alpha npm package for easily creating the request and response mapping templates.

The lib/databaseStack.ts file creates a single DynamoDB table that is used as a datasource for the AWS AppSync API above.

For a full walkthrough on how one might integrate the output from these stacks into a frontend application that makes use of AWS Amplify libraries, refer to this fullstack guide.

• npm run build compile typescript to js
• npm run watch watch for changes and compile
• cdk deploy deploy this stack to your default AWS account/region
• cdk diff compare deployed stack with current state
• cdk synth emits the synthesized CloudFormation template

See CONTRIBUTING for more information.

This library is licensed under the MIT-0 License. See the LICENSE file.