aws-solutions-constructs.aws-eventbridge-stepfunctions 2.0.0rc1

CDK Constructs for deploying AWS Events Rule that invokes AWS Step Functions

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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

This AWS Solutions Construct implements an AWS Events rule and an AWS Step Functions State Machine

Here is a minimal deployable pattern definition in Typescript:

const { EventbridgeToStepfunctions, EventbridgeToStepfunctionsProps } from '@aws-solutions-constructs/aws-eventbridge-stepfunctions';

const startState = new stepfunctions.Pass(this, 'StartState');

const props: EventbridgeToStepfunctionsProps = {
    stateMachineProps: {
      definition: startState
    },
    eventRuleProps: {
      schedule: events.Schedule.rate(Duration.minutes(5))
    }
};

new EventbridgeToStepfunctions(stack, 'test-eventbridge-stepfunctions-stack', props);

Initializer

new EventbridgeToStepfunctions(scope: Construct, id: string, props: EventbridgeToStepfunctionsProps);

Parameters

• scope Construct
• id string
• props EventbridgeToStepfunctionsProps

Pattern Construct Props

Name	Type	Description
stateMachineProps	sfn.StateMachineProps	Optional user provided props to override the default props for sfn.StateMachine
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.
eventRuleProps	events.RuleProps	User provided eventRuleProps to override the defaults
createCloudWatchAlarms	boolean	Whether to create recommended CloudWatch alarms
logGroupProps?	logs.LogGroupProps	User provided props to override the default props for for the CloudWatchLogs LogGroup.

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
stateMachine	sfn.StateMachine	Returns an instance of sfn.StateMachine created by the construct
stateMachineLogGroup	logs.ILogGroup	Returns an instance of the ILogGroup created by the construct for StateMachine
cloudwatchAlarms?	cloudwatch.Alarm[]	Returns a list of cloudwatch.Alarm 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 Step Function

• Enable CloudWatch logging for API Gateway
• Deploy best practices CloudWatch Alarms for the Step Function

Architecture

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