Submit a new serverless pattern - API Gateway, Lambda, DynamoDB, Kinesis, Lambda

apigw-lambda-dynamodb-kinesis-lambda/README.md

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+# API Gateway, Lambda, DynamoDB, Kinesis, Lambda
+
+This pattern explains how to deploy a SAM application with Amazon API Gateway, AWS Lambda, and Amazon DynamoDB and Stream to Kinesis and finaly trigger a Lambda. When an HTTP POST request is made to the Amazon API Gateway endpoint, the AWS Lambda function is invoked and inserts an item into the Amazon DynamoDB table, then an event will be pushed into Kinesis and trigger a Lambda function
+
+![Concept](img/concept.png)
+
+
+Learn more about this pattern at Serverless Land Patterns: << Add the https://serverlessland.com/patterns/apigw-lambda-dynamodb-kinesis-lambda
+
+Important: this application uses various AWS services and there are costs associated with these services after the Free Tier usage - please see the [AWS Pricing page](https://aws.amazon.com/pricing/) for details. You are responsible for any AWS costs incurred. No warranty is implied in this example.
+
+## Requirements
+
+* [Create an AWS account](https://portal.aws.amazon.com/gp/aws/developer/registration/index.html) if you do not already have one and log in. The IAM user that you use must have sufficient permissions to make necessary AWS service calls and manage AWS resources.
+* [AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html) installed and configured
+* [Git Installed](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
+* [AWS Serverless Application Model](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html) (AWS SAM) installed
+
+## Deployment Instructions
+
+1. Create a new directory, navigate to that directory in a terminal and clone the GitHub repository:
+    ``` 
+    git clone https://github.com/aws-samples/serverless-patterns
+    ```
+1. Change directory to the pattern directory:
+    ```
+    cd apigw-lambda-dynamodb-kinesis-lambda
+    ```
+1. From the command line, use AWS SAM to deploy the AWS resources for the pattern as specified in the template.yml file:
+    ```
+    sam deploy --guided
+    ```
+1. During the prompts:
+    * Enter a stack name
+    * Enter the desired AWS Region
+    * Allow SAM CLI to create IAM roles with the required permissions.
+
+    Once you have run `sam deploy --guided` mode once and saved arguments to a configuration file (samconfig.toml), you can use `sam deploy` in future to use these defaults.
+
+1. Note the outputs from the SAM deployment process. These contain the resource names and/or ARNs which are used for testing.
+
+## How it works
+
+Explain how the service interaction works.
+
+## Testing
+
+Provide steps to trigger the integration and show what should be observed if successful.
+
+## Cleanup
+
+1. Delete the stack
+    ```bash
+    aws cloudformation delete-stack --stack-name STACK_NAME
+    ```
+1. Confirm the stack has been deleted
+    ```bash
+    aws cloudformation list-stacks --query "StackSummaries[?contains(StackName,'STACK_NAME')].StackStatus"
+    ```
+----
+Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+
+SPDX-License-Identifier: MIT-0

apigw-lambda-dynamodb-kinesis-lambda/example-pattern.json

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+{
+  "title": "API Gateway to Lambda, DynamoDB, Kinesis, Lambda integration",
+  "description": "Create a api to trigger Lambda, Save to DynamoDB, emit message to Kinesis and trigger a Lambda",
+  "language": "Python",
+  "level": "200",
+  "framework": "SAM",
+  "introBox": {
+    "headline": "How it works",
+    "text": [
+      "This sample project demonstrates how to use Amazon API Gateway, AWS Lambda, Amazon DynamoDB and Kinesis together. When an HTTP POST request is made to the Amazon API Gateway endpoint, the AWS Lambda function is invoked and inserts an item into the Amazon DynamoDB table, then an event will be pushed into Kinesis and trigger a Lambda function."
+    ]
+  },
+  "gitHub": {
+    "template": {
+      "repoURL": "https://github.com/aws-samples/serverless-patterns/tree/main/apigw-lambda-dynamodb-kinesis-lambda",
+      "templateURL": "serverless-patterns/apigw-lambda-dynamodb-kinesis-lambda",
+      "projectFolder": "apigw-lambda-dynamodb-kinesis-lambda",
+      "templateFile": "apigw-lambda-dynamodb-kinesis-lambda/sfn_athena_cdk_python_stack.py"
+    }
+  },
+  "resources": {
+    "bullets": [
+      {
+        "text": "API Gateway to trigger Lambda and save to DynamoDB",
+        "link": "https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-dynamo-db.html"
+      },
+      {
+        "text": "DynamoDB to Kinesis",
+        "link": "https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/kds.html"
+      },
+      {
+        "text": "Kinesis to Lambda",
+        "link": "https://docs.aws.amazon.com/lambda/latest/dg/with-kinesis.html"
+      }
+    ]
+  },
+  "deploy": {
+    "text": [
+      "sam deploy"
+    ]
+  },
+  "testing": {
+    "text": [
+      "See the Github repo for detailed testing instructions."
+    ]
+  },
+  "cleanup": {
+    "text": [
+      "Delete the stack: <code>sam delete</code>"
+    ]
+  },
+  "authors": [
+    {
+      "name": "Thi Nguyen",
+      "image": "https://drive.google.com/file/d/188LpzUvUmHt1o7vzbwKw32S-fYabL-qY/view?usp=sharing",
+      "bio": "Solutions Architect @ AWS",
+      "linkedin": "https://www.linkedin.com/in/ndthi"
+    },
+    {
+      "name": "Vijay Konade",
+      "image": "vijay.png",
+      "bio": "Cloud Support Eng @ AWS",
+      "linkedin": "https://www.linkedin.com/in/vijay-konade-14427479/"
+    }
+  ]
+}

apigw-lambda-dynamodb-kinesis-lambda/src/apiHandler.py

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+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: MIT-0
+
+import boto3
+import json
+dynamodb_client = boto3.resource('dynamodb')
+
+def lambda_handler(event, context):
+  table = dynamodb_client.Table('Transaction')
+  print(event)
+  item = json.loads(event['body'])
+  print(item)
+  table.put_item(
+        Item={
+          'id': item['id'],
+          'name': item['name'],
+          'description': item['description'],
+          'customer': item['customer']
+          }
+        )
+  return {
+      'statusCode': 200,
+      'body': 'Successfully inserted data!'
+  }

apigw-lambda-dynamodb-kinesis-lambda/src/messageHandler.py

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+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: MIT-0
+import os
+import boto3
+from aws_lambda_powertools.utilities.data_classes import KinesisStreamEvent
+from aws_lambda_powertools.utilities.typing import LambdaContext
+
+def lambda_handler(event: KinesisStreamEvent, context: LambdaContext):
+  records = event["Records"]
+  print(records)

apigw-lambda-dynamodb-kinesis-lambda/src/requirements.txt

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+aws-xray-sdk
+aws_lambda_powertools

apigw-lambda-dynamodb-kinesis-lambda/template.yaml

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+AWSTemplateFormatVersion: '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Description: Serverless patterns - Amazon API Gateway to AWS Lambda to Amazon DynamoDB
+Parameters:
+  KinesisStreamName:
+    Type: String
+    Default: testDataStream
+    Description: Enter a name for the Kinesis Data Stream.
+Resources:
+  KinesisStream:
+    Type: AWS::Kinesis::Stream
+    Properties:
+      Name: !Ref KinesisStreamName
+      ShardCount: 1
+  LambdaProducerFunction:
+    Type: AWS::Serverless::Function
+    Properties:
+      FunctionName: LambdaProducerFunction
+      Handler: apiHandler.lambda_handler
+      Runtime: python3.9
+      CodeUri: src/
+      Policies:
+        DynamoDBCrudPolicy:
+          TableName: !Ref DynamoDBTable
+      Events:
+        ApiEvent:
+          Type: Api
+          Properties:
+            Path: /
+            Method: POST
+  DynamoDBTable:
+    Type: AWS::DynamoDB::Table
+    Properties:
+      AttributeDefinitions: 
+        - AttributeName: id
+          AttributeType: S
+      KeySchema: 
+        - AttributeName: id
+          KeyType: HASH
+      ProvisionedThroughput: 
+        ReadCapacityUnits: 5
+        WriteCapacityUnits: 5
+      StreamSpecification:
+        StreamViewType: NEW_IMAGE
+      TableName: Transaction
+      KinesisStreamSpecification: 
+        StreamArn: !GetAtt KinesisStream.Arn
+
+  LambdaConsumerFunction:
+    Type: AWS::Serverless::Function
+    Properties:
+      FunctionName: LambdaConsumerFunction
+      Handler: messageHandler.lambda_handler
+      Runtime: python3.9
+      CodeUri: src/
+      Policies: 
+      - KinesisStreamReadPolicy:
+          StreamName: !Ref KinesisStreamName      
+      Events:
+        Stream:
+          Type: Kinesis
+          Properties:
+            Stream: !GetAtt KinesisStream.Arn
+            StartingPosition: LATEST
+            BatchSize: 100
+
+Outputs:
+  EndpointUrl:
+    Description: 'HTTP REST endpoint URL'
+    Value: !Sub 'https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod'