aws-eventbridge-stepfunctions module

| 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|

Overview

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

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps, Duration } from 'aws-cdk-lib';
import { EventbridgeToStepfunctions, EventbridgeToStepfunctionsProps } from '@aws-solutions-constructs/aws-eventbridge-stepfunctions';
import * as stepfunctions from 'aws-cdk-lib/aws-stepfunctions';
import * as events from 'aws-cdk-lib/aws-events';

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

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

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

Python

from aws_solutions_constructs.aws_eventbridge_stepfunctions import EventbridgeToStepfunctions, EventbridgeToStepfunctionsProps
from aws_cdk import (
    aws_stepfunctions as stepfunctions,
    aws_events as events,
    Duration,
    Stack
)
from constructs import Construct

startState = stepfunctions.Pass(self, 'StartState')

EventbridgeToStepfunctions(self, 'test-eventbridge-stepfunctions-stack',
                            state_machine_props=stepfunctions.StateMachineProps(
                                definition=startState
                            ),
                            event_rule_props=events.RuleProps(
                                schedule=events.Schedule.rate(
                                    Duration.minutes(5))
                            ))

Java

import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.Duration;
import software.amazon.awscdk.services.events.*;
import software.amazon.awscdk.services.stepfunctions.*;
import software.amazon.awsconstructs.services.eventbridgestepfunctions.*;

final Pass startState = new Pass(this, "StartState");

new EventbridgeToStepfunctions(this,
        "test-eventbridge-stepfunctions-stack",
        new EventbridgeToStepfunctionsProps.Builder()
                .stateMachineProps(new StateMachineProps.Builder()
                        .definition(startState)
                        .build())
                .eventRuleProps(new RuleProps.Builder()
                        .schedule(Schedule.rate(Duration.minutes(5)))
                        .build())
                .build());

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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