Create the AWS resources - AWS SDK for JavaScript
Create the AWS resources using AWS CloudFormationPopulating the table

The AWS SDK for JavaScript V3 API Reference Guide describes in detail all the API operations for the AWS SDK for JavaScript version 3 (V3).

Create the AWS resources

This app requires the following resources:

  • AWS Identity and Access Management (IAM) Unauthenticated Amazon Cognito user role with the following permissions:

    • sns:Publish

    • dynamodb:PutItem

  • A DynamoDB table.

You can create these resources manually in the AWS console, but we recommend provisioning these resources using the AWS CloudFormation (AWS CloudFormation) as described in this tutorial.

Create the AWS resources using AWS CloudFormation

AWS CloudFormation enables you to create and provision AWS infrastructure deployments predictably and repeatedly. For more information about AWS CloudFormation, see the AWS CloudFormation developer guide..

To create the AWS CloudFormation stack using the AWS CLI:

  1. Install and configure the AWS CLI following the instructions in the AWS CLI User Guide.

  2. Create a file named setup.yaml in the root directory of your project folder, and copy the content here on GitHub into it.

    Note

    The AWS CloudFormation template was generated using the AWS CDK available here on GitHub. For more information about the AWS CDK, see the AWS Cloud Development Kit (AWS CDK) Developer Guide.

  3. Run the following command from the command line, replacing STACK_NAME with a unique name for the stack, and REGION in your AWS region.

    Important

    The stack name must be unique within an AWS Region and AWS account. You can specify up to 128 characters, and numbers and hyphens are allowed.

    aws cloudformation create-stack --stack-name STACK_NAME --template-body file://setup.yaml --capabilities CAPABILITY_IAM --region REGION

    For more information on the create-stack command parameters, see the AWS CLI Command Reference guide, and the AWS CloudFormation User Guide.

    To view the resources created, open AWS CloudFormation in the AWS management console, choose the stack, and select the Resources tab.

  4. When the stack is create, use the AWS SDK for JavaScript to populate the DynamoDB table, as described in Populating the table.

Populating the table

To populate the table, first create a directory named libs, and in it create a file named dynamoClient.js, and paste the content below into it. Replace REGION with your AWS Region. This creates the DynamoDB client object.

import { CognitoIdentityClient } from "@aws-sdk/client-cognito-identity";
import { fromCognitoIdentityPool } from "@aws-sdk/credential-provider-cognito-identity";
import { DynamoDBClient } from "@aws-sdk/client-dynamodb";

const REGION = "REGION";
const IDENTITY_POOL_ID = "IDENTITY_POOL_ID"; // An Amazon Cognito Identity Pool ID.

// Create an Amazon DynaomDB service client object.
const dynamoClient = new DynamoDBClient({
  region: REGION,
  credentials: fromCognitoIdentityPool({
    client: new CognitoIdentityClient({ region: REGION }),
    identityPoolId: IDENTITY_POOL_ID,
  }),
});

export { dynamoClient };

This code is available here on GitHub.

Next, create a dynamoAppHelperFiles folder in your project folder, create a file update-table.js in it, and copy the content here on GitHub into it. 

// Import required AWS SDK clients and commands for Node.js
import { PutItemCommand } from "@aws-sdk/client-dynamodb";
import { dynamoClient } from "../libs/dynamoClient.js";

// Set the parameters
export const params = {
  TableName: "Items",
  Item: {
    id: { N: "1" },
    title: { S: "aTitle" },
    name: { S: "aName" },
    body: { S: "aBody" },
  },
};

export const run = async () => {
  try {
    const data = await dynamoClient.send(new PutItemCommand(params));
    console.log("success");
    console.log(data);
  } catch (err) {
    console.error(err);
  }
};
run();

Run the following command from the command line.

node update-table.js

This code is available here on GitHub.