aws-sqs-lambda

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

Language	Package
Python	aws_solutions_constructs.aws_sqs_lambda
Typescript	@aws-solutions-constructs/aws-sqs-lambda
Java	software.amazon.awsconstructs.services.sqslambda

This AWS Solutions Construct implements an Amazon SQS queue connected to an AWS Lambda function.

Here is a minimal deployable pattern definition in TypeScript:

const { SqsToLambda } = require('@aws-solutions-constructs/aws-sqs-lambda');

new SqsToLambda(stack, 'SqsToLambdaPattern', {
    lambdaFunctionProps: {
        runtime: lambda.Runtime.NODEJS_10_X,
        handler: 'index.handler',
        code: lambda.Code.fromAsset(`${__dirname}/lambda`)
    }
});

Initializer

new SqsToLambda(scope: Construct, id: string, props: SqsToLambdaProps);

Parameters

• scope Construct

• id string

• props SqsToLambdaProps

Pattern Construct Props

Name	Type	Description
existingLambdaObj?	lambda.Function	An optional, existing Lambda function to be used instead of the default function. If an existing function is provided, the lambdaFunctionProps property will be ignored.
lambdaFunctionProps?	lambda.FunctionProps	Optional user-provided properties to override the default properties for the Lambda function. Ignored if an existingLambdaObj is provided.
existingQueueObj?	sqs.Queue	An optional, existing SQS queue to be used instead of the default queue. If an existing queue is provided, the queueProps property will be ignored.
queueProps?	sqs.QueueProps	Optional user-provided properties to override the default properties for the SQS queue. Ignored if an existingQueueObj is provided.
deployDeadLetterQueue?	boolean	Whether to create a secondary queue to be used as a dead letter queue. Defaults to true.
deadLetterQueueProps?	sqs.QueueProps	Optional user-provided props to override the default props for the dead letter queue. Only used if the deployDeadLetterQueue property is set to true.
maxReceiveCount?	number	The number of times a message can be unsuccessfully dequeued before being moved to the dead letter queue. Defaults to 15.

Pattern Properties

Name	Type	Description
deadLetterQueue?	sqs.Queue	Returns an instance of the dead letter queue created by the pattern, if one is deployed.
lambdaFunction	lambda.Function	Returns an instance of the Lambda function created by the pattern.
sqsQueue	sqs.Queue	Returns an instance of the SQS queue created by the pattern.

Default settings

Out-of-the-box implementation of this pattern without any overrides will set the following defaults:

Amazon SQS Queue

• Deploy SQS dead-letter queue for the source SQS Queue.

• Enable server-side encryption for source SQS Queue using AWS Managed KMS Key.

• Enforce encryption of data in transit.

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.

• Set environment variables:

  • AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)

Architecture

GitHub

To view the code for this pattern, create/view issues and pull requests, and more:
	@aws-solutions-constructs/aws-sqs-lambda