This is a simple demo of an AWS Step function using Lambda, DynamoDB, SQS Queue to show looping within a workflow.
This is a demo of a step function to loop through a list of items. In the first state a Lambda function inserts some quotes (with is passed as an input) to the DynamoDB table and returns a list of patrtition keys. The state machine then loops through the list and in each iteration fetches the quote from the DynamoDB table and pushes it to a SQS Queue.
The entire stack is created using Serverless Framework (https://serverless.com).
- Install node.js and serverless framework (If you don't have Node.js on your machine, install it first)
npm install -g serverless
- Install the serverless-step-functions plugin
npm install --save-dev serverless-step-functions
- Clone the repository.
- Create a S3 bucket to be used as serverless deployment bucket and update the provider section in the serverless.yml.
provider:
name: aws
stackName: celosia-sls-stack
deploymentBucket:
name: subhamay-serverless-deploy-us-east-1
serverSideEncryption: AES256
runtime: python3.9
stage: devl
region: us-east-1
environment:
DYNAMODB_TABLE_NAME: ${self:custom.dynamodb-table}
- Run the following command to deploy the stack
sls deploy --verbose
- Run the following command to delete the stack
sls remove --verbose
- To delete the stack run the following command:
- terraform destroy -auto-approve
- Go to the Step Function Console and use the sample input and start the execution
- Step-by-step bullets
{
"quotes":[
"Age is an issue of mind over matter. If you don't mind, it doesn't matter.- Mark Twain",
"Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.- Henry Ford",
"Wrinkles should merely indicate where smiles have been.- Mark Twain",
"True terror is to wake up one morning and discover that your high school class is running the country.- Kurt Vonnegut",
"A diplomat is a man who always remembers a woman's birthday but never remembers her age.- Robert Frost",
"As I grow older, I pay less attention to what men say. I just watch what they do.- Andrew Carnegie",
"How incessant and great are the ills with which a prolonged old age is replete.- C. S. Lewis",
"Old age, believe me, is a good and pleasant thing. It is true you are gently shouldered off the stage, but then you are given such a comfortable front stall as spectator.- Confucius",
"Old age has deformities enough of its own. It should never add to them the deformity of vice.- Eleanor Roosevelt",
"Nobody grows old merely living a number of years. We grow old deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul.- Samuel Ullman",
"An archaeologist is the best husband a woman can have. The older she gets the more interested he is in her.- Agatha Christie",
"All diseases run into one, old age.- Ralph Waldo Emerson",
"Bashfulness is an ornament to youth, but a reproach to old age.- Aristotle",
"Like everyone else who makes the mistake of getting older, I begin each day with coffee and obituaries.- Bill Cosby",
"Age appears to be best in four things old wood best to burn, old wine to drink, old friends to trust, and old authors to read.- Francis Bacon",
"None are so old as those who have outlived enthusiasm.- Henry David Thoreau",
"Every man over forty is a scoundrel.- George Bernard Shaw",
"Forty is the old age of youth fifty the youth of old age.- Victor Hugo",
"You can't help getting older, but you don't have to get old.- George Burns",
"Alas, after a certain age every man is responsible for his face.- Albert Camus",
"Youth is when you're allowed to stay up late on New Year's Eve. Middle age is when you're forced to.- Bill Vaughan",
"Old age is like everything else. To make a success of it, you've got to start young.- Theodore Roosevelt",
"A comfortable old age is the reward of a well-spent youth. Instead of its bringing sad and melancholy prospects of decay, it would give us hopes of eternal youth in a better world.- Maurice Chevalier",
"A man growing old becomes a child again.- Sophocles",
"I will never be an old man. To me, old age is always 15 years older than I am.- Francis Bacon",
"Age considers youth ventures.- Rabindranath Tagore"
]
}
Post message in my blog (https://blog.subhamay.com)
Contributors names and contact info
Subhamay Bhattacharyya - subhamay.aws@gmail.com
https://docs.aws.amazon.com/step-functions/latest/dg/sample-project-transfer-data-sqs.html
- 0.1
- Initial Release
None
AWS