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2.55.0 • Public • Published

aws-s3-sns module

Stability: Experimental

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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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_s3_sns
Typescript Logo Typescript @aws-solutions-constructs/aws-s3-sns
Java Logo Java software.amazon.awsconstructs.services.s3sns


This AWS Solutions Construct implements an Amazon S3 Bucket that is configured to send S3 event messages to an Amazon SNS topic.

Here is a minimal deployable pattern definition:


import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import { S3ToSns } from "@aws-solutions-constructs/aws-s3-sns";

new S3ToSns(this, 'S3ToSNSPattern', {});


from aws_solutions_constructs.aws_s3_sns import S3ToSns
from aws_cdk import Stack
from constructs import Construct

S3ToSns(self, 'S3ToSNSPattern')


import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awsconstructs.services.s3sns.*;

new S3ToSns(this, "S3ToSNSPattern", new S3ToSnsProps.Builder()

Pattern Construct Props

Name Type Description
existingBucketObj? s3.Bucket Existing instance of S3 Bucket object. If this is provided, then also providing bucketProps is an error.
bucketProps? s3.BucketProps Optional user provided props to override the default props for the S3 Bucket.
s3EventTypes? s3.EventType[] The S3 event types that will trigger the notification. Defaults to s3.EventType.OBJECT_CREATED.
s3EventFilters? s3.NotificationKeyFilter[] S3 object key filter rules to determine which objects trigger this event. If not specified no filter rules will be applied.
loggingBucketProps? s3.BucketProps Optional user provided props to override the default props for the S3 Logging Bucket.
logS3AccessLogs? boolean Whether to turn on Access Logging for the S3 bucket. Creates an S3 bucket with associated storage costs for the logs. Enabling Access Logging is a best practice. default - true
existingTopicObj? sns.Topic An optional, existing SNS topic to be used instead of the default topic. Providing both this and topicProps will cause an error. If the SNS Topic is encrypted with a Customer-Managed KMS Key, the key must be specified in the existingTopicEncryptionKey property.
existingTopicEncryptionKey? kms.Key If an existing topic is provided in the existingTopicObj property, and that topic is encrypted with a Customer-Managed KMS key, this property also needs to be set with same key.
topicProps? sns.TopicProps Optional user provided props to override the default props for the SNS topic.
enableEncryptionWithCustomerManagedKey? boolean If no key is provided, this flag determines whether the topic is encrypted with a new CMK or an AWS managed key. This flag is ignored if any of the following are defined: topicProps.encryptionMasterKey, 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
snsTopic sns.Topic Returns an instance of the SNS Topic created by the pattern.
encryptionKey? kms.Key Returns an instance of the kms.Key associated with the SNS Topic
s3Bucket? s3.Bucket Returns an instance of the s3.Bucket created by the construct
s3LoggingBucket? s3.Bucket Returns an instance of s3.Bucket created by the construct as the logging bucket for the primary bucket.
s3BucketInterface s3.IBucket Returns an instance of s3.IBucket created by the construct.

Default settings

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

Amazon S3 Bucket

  • Configure Access logging for the S3 Bucket
  • Enable server-side encryption for S3 Bucket using an AWS managed KMS Key
  • Enforce encryption of data in transit
  • Turn on the versioning for the S3 Bucket
  • Don't allow public access for the S3 Bucket
  • Retain the S3 Bucket when deleting the CloudFormation stack
  • Applies Lifecycle rule to move noncurrent object versions to Glacier storage after 90 days

Amazon SNS Topic

  • Configure least privilege SNS Topic access policy to allow the S3 Bucket to publish messages to it
  • Enable server-side encryption for the SNS Topic using an AWS managed KMS Key
  • Enforce encryption of data in transit


Architecture Diagram

© Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.

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