aws-solutions-constructs.aws-lambda-sqs-lambda 1.94.1

CDK construct that provisions (1) an AWS Lambda function that is configured to send messages to a queue; (2) an Amazon SQS queue; and (3) an AWS Lambda function configured to consume messages from the queue.

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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

This AWS Solutions Construct implements (1) an AWS Lambda function that is configured to send messages to a queue; (2) an Amazon SQS queue; and (3) an AWS Lambda function configured to consume messages from the queue.

Here is a minimal deployable pattern definition in Typescript:

# Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
from aws_solutions_constructs.aws_lambda_sqs_lambda import LambdaToSqsToLambda, LambdaToSqsToLambdaProps

LambdaToSqsToLambda(self, "LambdaToSqsToLambdaPattern",
    producer_lambda_function_props=FunctionProps(
        runtime=lambda_.Runtime.NODEJS_12_X,
        handler="index.handler",
        code=lambda_.Code.from_asset(f"{__dirname}/lambda/producer-function")
    ),
    consumer_lambda_function_props=FunctionProps(
        runtime=lambda_.Runtime.NODEJS_12_X,
        handler="index.handler",
        code=lambda_.Code.from_asset(f"{__dirname}/lambda/consumer-function")
    )
)

Initializer

new LambdaToSqsToLambda(scope: Construct, id: string, props: LambdaToSqsToLambdaProps);

Parameters

• scope Construct
• id string
• props LambdaToSqsToLambdaProps

Pattern Construct Props

Name	Type	Description
existingProducerLambdaObj?	lambda.Function	An optional, existing Lambda function to be used instead of the default function for sending messages to the queue. If an existing function is provided, the producerLambdaFunctionProps property will be ignored.
producerLambdaFunctionProps?	lambda.FunctionProps	Optional user-provided properties to override the default properties for the producer Lambda function. Ignored if an existingProducerLambdaObj 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.
existingConsumerLambdaObj?	lambda.Function	An optional, existing Lambda function to be used instead of the default function for receiving/consuming messages from the queue. If an existing function is provided, the consumerLambdaFunctionProps property will be ignored.
consumerLambdaFunctionProps?	lambda.FunctionProps	Optional user-provided properties to override the default properties for the consumer Lambda function. Ignored if an existingConsumerLambdaObj is provided.
queueEnvironmentVariableName?	string	Optional Name for the SQS queue URL environment variable set for the producer Lambda function.

Pattern Properties

Name	Type	Description
producerLambdaFunction	lambda.Function	Returns an instance of the producer Lambda function created by the pattern.
sqsQueue	sqs.Queue	Returns an instance of the SQS queue created by the pattern.
deadLetterQueue?	[`sqs.Queue	undefined`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.Queue.html)
consumerLambdaFunction	lambda.Function	Returns an instance of the consumer Lambda function created by the pattern.

Default Settings

Out-of-the-box implementation of this Construct (without any overridden properties) will adhere to the following defaults:

AWS Lambda Functions

• Configure limited privilege access IAM role for Lambda functions.

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

• Enable X-Ray Tracing

• Set Environment Variables

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

Amazon SQS Queue

• Deploy a dead letter queue for the primary queue.
• Enable server-side encryption for the primary queue using an AWS Managed KMS Key.
• Enforce encryption of data in transit

Architecture

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