Project Daylily: A Step Function Demo using SNS (Simple Notification Service) and Wait state.

This is a simple demo of an AWS Step function using SNS (Simple Notification Service) and Wait state.

Description

This sample project creates a step function with a task timer. It implements an AWS Step Functions state machine that implements a Wait state, and uses an AWS Step function task that sends an Amazon Simple Notification Service (Amazon SNS) notification. A Wait state is a state type that waits for a trigger to perform a single unit of work.

The entire stack is created using AWS SAM (Serverless Application Model).

Prerequisite

• Install SAM CLI by following the Developer Guide (https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/install-sam-cli.html)

• Create a Customer Managed KMS Key which will be used to encrypt the SNS.

Installing

• Clone the repository https://github.com/subhamay-cloudworks/0086-daylily-sam

• Create a S3 bucket to store the code repository.

• Create the folders - daylily/cft/nested-stacks

• Upload the following YAML templates to daylily/cft/nested-stacks

  • sns-stack.yaml
  • iam-role-stack.yaml

• Run the following SAM CLI Commands and pass the required parameters:

sam build

sam deploy --guided --capabilities "CAPABILITY_NAMED_IAM"

• To delete the stack, either delete it from AWS CloudFormation Console or using CLI Command:

aws cloudformation delete-stack --stack-name <Name of the stack> --region <Region>

Executing program

• Go to the Step Function Console and use the sample input and start the execution

{
    "waitSeconds": 10,
    "Message": "Testing Step Function - Task Timer and SNS"
}

Help

Post message in my blog (https://blog.subhamay.com)

Authors

Contributors names and contact info

Subhamay Bhattacharyya - subhamay.aws@gmail.com

Reference

https://docs.aws.amazon.com/step-functions/latest/dg/sample-project-transfer-data-sqs.html

Version History

• 0.1
  • Initial Release

License

None

Acknowledgments

[AWS] (https://docs.aws.amazon.com/step-functions/latest/dg/task-timer-sample.html)