sns definition

To create an SNS notification after a Step Function execution using AWS CDK in TypeScript, you can follow these steps:

    Import the necessary AWS CDK libraries:

typescript

import * as cdk from 'aws-cdk-lib';
import * as sns from 'aws-cdk-lib/aws-sns';
import * as subs from 'aws-cdk-lib/aws-sns-subscriptions';
import * as stepfunctions from 'aws-cdk-lib/aws-stepfunctions';
import * as targets from 'aws-cdk-lib/aws-events-targets';

    Define the SNS topic and the subscription:

typescript

const topic = new sns.Topic(this, 'MyTopic', {
  displayName: 'My Topic'
});

const emailSubscription = new subs.EmailSubscription('[email protected]');
topic.addSubscription(emailSubscription);

This code creates an SNS topic and subscribes an email address to it. Replace '[email protected]' with the email address you want to receive the notification.

    Define the Step Function:

typescript

const myStateMachine = new stepfunctions.StateMachine(this, 'MyStateMachine', {
  definition: myStateMachineDefinition
});

Replace myStateMachineDefinition with the definition of your Step Function.

    Add a CloudWatch Events rule to trigger the SNS notification:

typescript

const rule = new cdk.aws_events.Rule(this, 'MyRule', {
  eventPattern: {
    source: ['aws.states'],
    detailType: ['Step Functions Execution Status Change'],
    detail: {
      status: ['SUCCEEDED']
    }
  }
});

rule.addTarget(new targets.SnsTopic(topic));

This code creates a CloudWatch Events rule that triggers the SNS topic when the Step Function execution succeeds. You can modify the eventPattern object to specify other conditions for triggering the SNS notification, such as failure or completion.

    Deploy the stack:

shell

cdk deploy

This will create the SNS topic, the Step Function, and the CloudWatch Events rule.

After deploying the stack, you will receive an email notification when the Step Function execution succeeds.