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    @aws-solutions-constructs/aws-dynamodb-stream-lambda
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    1.138.1 • Public • Published

    aws-dynamodb-stream-lambda module


    Stability: Deprecated

    Some of our early constructs don’t meet the naming standards that evolved for the library. We are releasing completely feature compatible versions with corrected names. The underlying implementation code is the same regardless of whether you deploy the construct using the old or new name. We will support both names for all 1.x releases, but in 2.x we will only publish the correctly named constructs. This construct is being replaced by the functionally identical aws-dynamodbstreams-lambda.


    Reference Documentation: https://docs.aws.amazon.com/solutions/latest/constructs/
    Language Package
    Python Logo Python aws_solutions_constructs.aws_dynamodb_stream_lambda
    Typescript Logo Typescript @aws-solutions-constructs/aws-dynamodb-stream-lambda
    Java Logo 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 in Typescript:

    import { DynamoDBStreamToLambdaProps,  DynamoDBStreamToLambda} from '@aws-solutions-constructs/aws-dynamodb-stream-lambda';
    
    new DynamoDBStreamToLambda(this, 'test-dynamodb-stream-lambda', {
        lambdaFunctionProps: {
            code: lambda.Code.fromAsset(`${__dirname}/lambda`),
            runtime: lambda.Runtime.NODEJS_14_X,
            handler: 'index.handler'
        },
    });

    Initializer

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

    Parameters

    Pattern Construct Props

    Name Type Description
    existingLambdaObj? lambda.Function Existing instance of Lambda Function object, providing both this and lambdaFunctionProps will cause an error.
    lambdaFunctionProps? lambda.FunctionProps User provided props to override the default props for the Lambda function.
    dynamoTableProps? dynamodb.TableProps Optional user provided props to override the default props for DynamoDB Table
    existingTableInterface? dynamodb.ITable Existing instance of DynamoDB table object or interface, providing both this and dynamoTableProps will cause an error.
    dynamoEventSourceProps? aws-lambda-event-sources.DynamoEventSourceProps Optional user provided props to override the default props for DynamoDB Event Source

    Pattern Properties

    Name Type Description
    dynamoTableInterface dynamodb.ITable Returns an instance of dynamodb.ITable created by the construct
    dynamoTable? dynamodb.Table Returns an instance of dynamodb.Table created by the construct. IMPORTANT: If existingTableInterface was provided in Pattern Construct Props, this property will be undefined
    lambdaFunction lambda.Function Returns an instance of lambda.Function created by the construct

    Lambda Function

    This pattern requires a lambda function that can post data into the Elasticsearch. A sample function is provided here.

    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
    • Enable continuous backups and point-in-time recovery

    AWS Lambda Function

    • Configure limited privilege access IAM role for Lambda function
    • Enable reusing connections with Keep-Alive for NodeJs Lambda function
    • Enable X-Ray Tracing
    • Enable Failure-Handling features like enable bisect on function Error, set defaults for Maximum Record Age (24 hours) & Maximum Retry Attempts (500) and deploy SQS dead-letter queue as destination on failure
    • Set Environment Variables
      • AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)

    Architecture

    Architecture Diagram


    © Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.

    Install

    npm i @aws-solutions-constructs/aws-dynamodb-stream-lambda

    DownloadsWeekly Downloads

    1,413

    Version

    1.138.1

    License

    Apache-2.0

    Unpacked Size

    220 kB

    Total Files

    16

    Last publish

    Collaborators

    • aws-solutions-constructs-team