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CDK Constructs for deploying AWS Events Rule that inveokes AWS Lambda

Project description

aws-events-rule-lambda module

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.


Reference Documentation: https://docs.aws.amazon.com/solutions/latest/constructs/
Language Package
Python Logo Python aws_solutions_constructs.aws_events_rule_lambda
Typescript Logo Typescript @aws-solutions-constructs/aws-events-rule-lambda
Java Logo Java software.amazon.awsconstructs.services.eventsrulelambda

This AWS Solutions Construct implements an AWS Events rule and an AWS Lambda function.

Here is a minimal deployable pattern definition in Typescript:

import { EventsRuleToLambdaProps, EventsRuleToLambda } from '@aws-solutions-constructs/aws-events-rule-lambda';

const props: EventsRuleToLambdaProps = {
    lambdaFunctionProps: {
        code: lambda.Code.fromAsset(`${__dirname}/lambda`),
        runtime: lambda.Runtime.NODEJS_12_X,
        handler: 'index.handler'
    },
    eventRuleProps: {
      schedule: events.Schedule.rate(Duration.minutes(5))
    }
};

new EventsRuleToLambda(this, 'test-events-rule-lambda', props);

Initializer

new EventsRuleToLambda(scope: Construct, id: string, props: EventsRuleToLambdaProps);

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.
existingEventBusInterface? events.IEventBus Optional user-provided custom EventBus for construct to use. Providing both this and eventBusProps results an error.
eventBusProps? events.EventBusProps Optional user-provided properties to override the default properties when creating a custom EventBus. Setting this value to {} will create a custom EventBus using all default properties. If neither this nor existingEventBusInterface is provided the construct will use the default EventBus. Providing both this and existingEventBusInterface results an error.
lambdaFunctionProps? lambda.FunctionProps User provided props to override the default props for the Lambda function.
eventRuleProps events.RuleProps User provided eventRuleProps to override the defaults

Pattern Properties

Name Type Description
eventBus? events.IEventBus Returns the instance of events.IEventBus used by the construct
eventsRule events.Rule Returns an instance of events.Rule 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 CloudWatch Events Rule

  • Grant least privilege permissions to CloudWatch Events to trigger the Lambda Function

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

Architecture Diagram


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