aws-solutions-constructs.aws-dynamodb-stream-lambda 1.48.0

CDK Constructs for AWS DynamoDB Stream to AWS Lambda integration.

aws-dynamodb-stream-lambda module

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All classes are under active development and subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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Reference Documentation:	https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	aws_solutions_constructs.aws_dynamodb_stream_lambda
Typescript	@aws-solutions-constructs/aws-dynamodb-stream-lambda
Java	software.amazon.awsconstructs.services.dynamodbstreamlambda

This AWS Solutions Construct implements a pattern Amazon DynamoDB table with stream to invoke the AWS Lambda function with the least privileged permissions.

Here is a minimal deployable pattern definition:

const { DynamoDBStreamToLambdaProps,  DynamoDBStreamToLambda} = require('@aws-solutions-constructs/aws-dynamodb-stream-lambda');

const props: DynamoDBStreamToLambdaProps = {
    deployLambda: true,
    lambdaFunctionProps: {
        code: lambda.Code.asset(`${__dirname}/lambda`),
        runtime: lambda.Runtime.NODEJS_12_X,
        handler: 'index.handler'
    },
};

new DynamoDBStreamToLambda(stack, 'test-dynamodb-stream-lambda', props);

Initializer

new DynamoDBStreamToLambda(scope: Construct, id: string, props: DynamoDBStreamToLambdaProps);

Parameters

• scope Construct
• id string
• props DynamoDBStreamToLambdaProps

Pattern Construct Props

Name	Type	Description
deployLambda	boolean	Whether to create a new Lambda function or use an existing Lambda function
existingLambdaObj?	lambda.Function	Existing instance of Lambda Function object
lambdaFunctionProps?	lambda.FunctionProps	Optional user provided props to override the default props for Lambda function
dynamoTableProps?	dynamodb.TableProps	Optional user provided props to override the default props for DynamoDB Table
existingTableObj?	dynamodb.Table	Existing instance of DynamoDB table object, If this is set then the dynamoTableProps is ignored
dynamoEventSourceProps?	aws-lambda-event-sources.DynamoEventSourceProps	Optional user provided props to override the default props for DynamoDB Event Source

Pattern Properties

Name	Type	Description
dynamoTable	dynamodb.Table	Returns an instance of dynamodb.Table created by the construct
lambdaFunction	lambda.Function	Returns an instance of lambda.Function created by the construct

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

Amazon DynamoDB Table

• Set the billing mode for DynamoDB Table to On-Demand (Pay per request)
• Enable server-side encryption for DynamoDB Table using AWS managed KMS Key
• Creates a partition key called 'id' for DynamoDB Table
• Retain the Table when deleting the CloudFormation stack

AWS Lambda Function

• Configure least privilege access IAM role for Lambda function
• Enable reusing connections with Keep-Alive for NodeJs Lambda function

Architecture

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