@aws-solutions-constructs/aws-eventbridge-sns

aws-eventbridge-sns module

Reference Documentation:	https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	aws_solutions_constructs.aws_eventbridge_sns
Typescript	@aws-solutions-constructs/aws-eventbridge-sns
Java	software.amazon.awsconstructs.services.eventbridgesns

Overview

This AWS Solutions Construct implements an AWS Events rule and an AWS SNS Topic.

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps, Duration } from 'aws-cdk-lib';
import * as events from 'aws-cdk-lib/aws-events';
import * as iam from 'aws-cdk-lib/aws-iam';
import { EventbridgeToSnsProps, EventbridgeToSns } from "@aws-solutions-constructs/aws-eventbridge-sns";

const constructProps: EventbridgeToSnsProps = {
  eventRuleProps: {
    schedule: events.Schedule.rate(Duration.minutes(5))
  }
};

const constructStack = new EventbridgeToSns(this, 'test-construct', constructProps);

// Grant yourself permissions to use the Customer Managed KMS Key
const policyStatement = new iam.PolicyStatement({
  actions: ["kms:Encrypt", "kms:Decrypt"],
  effect: iam.Effect.ALLOW,
  principals: [new iam.AccountRootPrincipal()],
  resources: ["*"]
});

constructStack.encryptionKey?.addToResourcePolicy(policyStatement);

Python

from aws_solutions_constructs.aws_eventbridge_sns import EventbridgeToSns, EventbridgeToSnsProps
from aws_cdk import (
    aws_events as events,
    aws_iam as iam,
    Duration,
    Stack
)
from constructs import Construct

construct_stack = EventbridgeToSns(self, 'test-construct',
                                    event_rule_props=events.RuleProps(
                                        schedule=events.Schedule.rate(
                                            Duration.minutes(5))
                                    ))

# Grant yourself permissions to use the Customer Managed KMS Key
policy_statement = iam.PolicyStatement(
    actions=["kms:Encrypt", "kms:Decrypt"],
    effect=iam.Effect.ALLOW,
    principals=[iam.AccountRootPrincipal()],
    resources=["*"]
)

construct_stack.encryption_key.add_to_resource_policy(policy_statement)

Java

import software.constructs.Construct;
import java.util.List;

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.iam.*;
import software.amazon.awsconstructs.services.eventbridgesns.*;

final EventbridgeToSns constructStack = new EventbridgeToSns(this, "test-construct",
        new EventbridgeToSnsProps.Builder()
                .eventRuleProps(new RuleProps.Builder()
                        .schedule(Schedule.rate(Duration.minutes(5)))
                        .build())
                .build());

// Grant yourself permissions to use the Customer Managed KMS Key
final PolicyStatement policyStatement = PolicyStatement.Builder.create()
        .actions(List.of("kms:Encrypt", "kms:Decrypt"))
        .effect(Effect.ALLOW)
        .principals(List.of(new AccountRootPrincipal()))
        .resources(List.of("*"))
        .build();

constructStack.getEncryptionKey().addToResourcePolicy(policyStatement);

Pattern Construct Props

Name	Type	Description
eventRuleProps	events.RuleProps	User provided eventRuleProps to override the defaults.
existingTopicObj?	sns.Topic	Existing instance of SNS Topic object, providing both this and topicProps will cause an error.
topicProps?	sns.TopicProps	User provided props to override the default props for the SNS Topic.
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.
enableEncryptionWithCustomerManagedKey?	boolean	If no key is provided, this flag determines whether the SNS Topic is encrypted with a new CMK or an AWS managed key. This flag is ignored if any of the following are defined: topicProps.masterKey, encryptionKey or encryptionKeyProps.
encryptionKey?	kms.Key	An optional, imported encryption key to encrypt the SNS Topic with.
encryptionKeyProps?	kms.KeyProps	Optional user provided properties to override the default properties for the KMS encryption key used to encrypt the SNS Topic with.

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
snsTopic	sns.Topic	Returns an instance of sns.Topic created by the construct
encryptionKey?	kms.Key	Returns an instance of kms Key used for the SNS Topic.

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

Amazon EventBridge Rule

• Grant least privilege permissions to EventBridge Rule to publish to the SNS Topic.

Amazon SNS Topic

• Configure least privilege access permissions for SNS Topic.
• Enable server-side encryption forSNS Topic using Customer managed KMS Key.
• Enforce encryption of data in transit.

Architecture

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