aws-lambda-sqs

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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_lambda_sqs
Typescript	@aws-solutions-constructs/aws-lambda-sqs
Java	software.amazon.awsconstructs.services.lambdasqs

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

Here is a minimal deployable pattern definition:

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

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

Initializer

new LambdaToSqs(scope: Construct, id: string, props: LambdaToSqsProps);

Parameters

• scope Construct

• id string

• props LambdaToSqsProps

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.
enableQueuePurging?	boolean	Whether to grant additional permissions to the Lambda function enabling it to purge the SQS queue. Defaults to false.
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 the Construct without any override will set the following defaults:

AWS Lambda Function

• Configure least privilege access IAM role for Lambda function.

• Enable reusing connections with Keep-Alive for NodeJs Lambda function.

• Allow the function to only send messages to the queue (purging can be enabled using the enableQueuePurge property).

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

Architecture