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</div><div class="table-container"><div class="table-contents"><table id="w161aab9d129b4"><thead>
<tr>
<th>
<strong>Language</strong>
</th>
<th>
<strong>Package</strong>
</th>
</tr>
</thead>
<tr>
<td tabindex="-1">
<span class="inlinemediaobject">
<img src="https://docs.aws.amazon.com/cdk/api/latest/img/python32.png" class="aws-docs-img-whiteBg aws-docs-img-xs-padding" alt="Python Logo" />
</span> Python
</td>
<td tabindex="-1">
<code class="literal">aws_solutions_constructs.aws_lambda_sns</code>
</td>
</tr>
<tr>
<td tabindex="-1">
<span class="inlinemediaobject">
<img src="https://docs.aws.amazon.com/cdk/api/latest/img/typescript32.png" class="aws-docs-img-whiteBg aws-docs-img-xs-padding" alt="Typescript Logo" />
</span> Typescript
</td>
<td tabindex="-1">
<code class="literal">@aws-solutions-constructs/aws-lambda-sns</code>
</td>
</tr>
<tr>
<td tabindex="-1">
<span class="inlinemediaobject">
<img src="https://docs.aws.amazon.com/cdk/api/latest/img/java32.png" class="aws-docs-img-whiteBg aws-docs-img-xs-padding" alt="Java Logo" />
</span> Java
</td>
<td tabindex="-1">
<code class="literal">software.amazon.awsconstructs.services.lambdasns</code>
</td>
</tr>
</table></div></div><h2 id="overview">Overview</h2>
<p>
This AWS Solutions Construct implements an AWS Lambda function
connected to an Amazon SNS topic.
</p>
<p>
Here is a minimal deployable pattern definition:
</p>
<awsdocs-tabs><dl style="display: none">
<dt>Typescript</dt><dd tab-id="typescript"><pre class="programlisting"><div class="code-btn-container"><div class="btn-copy-code" title="Copy"><awsui-icon name="copy"></awsui-icon></div></div><!--DEBUG: cli (typescript)--><code class="typescript ">
import <span>{</span> Construct } from 'constructs';
import <span>{</span> Stack, StackProps } from 'aws-cdk-lib';
import <span>{</span> LambdaToSns, LambdaToSnsProps } from "@aws-solutions-constructs/aws-lambda-sns";
import * as lambda from 'aws-cdk-lib/aws-lambda';
new LambdaToSns(this, 'test-lambda-sns', <span>{</span>
lambdaFunctionProps: <span>{</span>
runtime: lambda.Runtime.NODEJS_20_X,
handler: 'index.handler',
code: lambda.Code.fromAsset(`lambda`)
}
});
</code></pre></dd>
<dt>Python</dt><dd tab-id="python"><pre class="programlisting"><div class="code-btn-container"><div class="btn-copy-code" title="Copy"><awsui-icon name="copy"></awsui-icon></div></div><!--DEBUG: cli (python)--><code class="python ">
from aws_solutions_constructs.aws_lambda_sns import LambdaToSns
from aws_cdk import (
aws_lambda as _lambda,
Stack
)
from constructs import Construct
LambdaToSns(
self, 'test-lambda-sns-stack',
lambda_function_props=_lambda.FunctionProps(
code=_lambda.Code.from_asset('lambda'),
runtime=_lambda.Runtime.Python_3_11,
handler='index.handler'
)
)
</code></pre></dd>
<dt>Java</dt><dd tab-id="java"><pre class="programlisting"><div class="code-btn-container"><div class="btn-copy-code" title="Copy"><awsui-icon name="copy"></awsui-icon></div></div><!--DEBUG: cli (java)--><code class="java ">
import software.constructs.Construct;
import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.services.lambda.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.lambdasns.*;
new LambdaToSns(this, "test-lambda-sns-stack", new LambdaToSnsProps.Builder()
.lambdaFunctionProps(new FunctionProps.Builder()
.runtime(Runtime.NODEJS_20_X)
.code(Code.fromAsset("lambda"))
.handler("index.handler")
.build())
.build());
</code></pre></dd>
</dl></awsdocs-tabs>
<h2 id="pattern-construct-props">Pattern Construct Props</h2>
<div class="table-container"><div class="table-contents"><table id="w161aab9d129b8b2"><thead>
<tr>
<th>
<strong>Name</strong>
</th>
<th>
<strong>Type</strong>
</th>
<th>
<strong>Description</strong>
</th>
</tr>
</thead>
<tr>
<td tabindex="-1">
existingLambdaObj?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html"><code class="literal">lambda.Function</code></a>
</td>
<td tabindex="-1">
Existing instance of Lambda Function object, providing
both this and <code class="literal">lambdaFunctionProps</code>
will cause an error.
</td>
</tr>
<tr>
<td tabindex="-1">
lambdaFunctionProps?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.FunctionProps.html"><code class="literal">lambda.FunctionProps</code></a>
</td>
<td tabindex="-1">
User provided props to override the default props for
the Lambda function.
</td>
</tr>
<tr>
<td tabindex="-1">
existingTopicObj?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html"><code class="literal">sns.Topic</code></a>
</td>
<td tabindex="-1">
Existing instance of SNS Topic object, providing both
this and <code class="literal">topicProps</code> will cause an
error.
</td>
</tr>
<tr>
<td tabindex="-1">
topicProps?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_sns.TopicProps.html"><code class="literal">sns.TopicProps</code></a>
</td>
<td tabindex="-1">
Optional user provided properties to override the
default properties for the SNS topic.
</td>
</tr>
<tr>
<td tabindex="-1">
existingVpc?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.IVpc.html"><code class="literal">ec2.IVpc</code></a>
</td>
<td tabindex="-1">
An optional, existing VPC into which this pattern should
be deployed. When deployed in a VPC, the Lambda function
will use ENIs in the VPC to access network resources and
an Interface Endpoint will be created in the VPC for
Amazon SNS. If an existing VPC is provided, the
<code class="literal">deployVpc</code> property cannot be
<code class="literal">true</code>. This uses
<code class="literal">ec2.IVpc</code> to allow clients to supply
VPCs that exist outside the stack using the
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.Vpc.html#static-fromwbrlookupscope-id-options"><code class="literal">ec2.Vpc.fromLookup()</code></a>
method.
</td>
</tr>
<tr>
<td tabindex="-1">
vpcProps?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.VpcProps.html"><code class="literal">ec2.VpcProps</code></a>
</td>
<td tabindex="-1">
Optional user-provided properties to override the
default properties for the new VPC.
<code class="literal">enableDnsHostnames</code>,
<code class="literal">enableDnsSupport</code>,
<code class="literal">natGateways</code> and
<code class="literal">subnetConfiguration</code> are set by the
pattern, so any values for those properties supplied
here will be overridden. If <code class="literal">deployVpc</code>
is not <code class="literal">true</code> then this property will
be ignored.
</td>
</tr>
<tr>
<td tabindex="-1">
deployVpc?
</td>
<td tabindex="-1">
<code class="literal">boolean</code>
</td>
<td tabindex="-1">
Whether to create a new VPC based on
<code class="literal">vpcProps</code> into which to deploy this
pattern. Setting this to true will deploy the minimal,
most private VPC to run the pattern:
</td>
</tr>
<tr>
<td tabindex="-1">
topicArnEnvironmentVariableName?
</td>
<td tabindex="-1">
<code class="literal">string</code>
</td>
<td tabindex="-1">
Optional Name for the Lambda function environment
variable set to the arn of the topic. Default:
SNS_TOPIC_ARN
</td>
</tr>
<tr>
<td tabindex="-1">
topicNameEnvironmentVariableName?
</td>
<td tabindex="-1">
<code class="literal">string</code>
</td>
<td tabindex="-1">
Optional Name for the Lambda function environment
variable set to the name of the topic. Default:
SNS_TOPIC_NAME
</td>
</tr>
<tr>
<td tabindex="-1">
enableEncryptionWithCustomerManagedKey?
</td>
<td tabindex="-1">
<code class="literal">boolean</code>
</td>
<td tabindex="-1">
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.
</td>
</tr>
<tr>
<td tabindex="-1">
encryptionKey?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_kms.Key.html"><code class="literal">kms.Key</code></a>
</td>
<td tabindex="-1">
An optional, imported encryption key to encrypt the SNS
Topic with.
</td>
</tr>
<tr>
<td tabindex="-1">
encryptionKeyProps?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_kms.Key.html#construct-props"><code class="literal">kms.KeyProps</code></a>
</td>
<td tabindex="-1">
Optional user provided properties to override the
default properties for the KMS encryption key used to
encrypt the SNS Topic with.
</td>
</tr>
</table></div></div>
<h2 id="pattern-properties">Pattern Properties</h2>
<div class="table-container"><div class="table-contents"><table id="w161aab9d129c10b2"><thead>
<tr>
<th>
<strong>Name</strong>
</th>
<th>
<strong>Type</strong>
</th>
<th>
<strong>Description</strong>
</th>
</tr>
</thead>
<tr>
<td tabindex="-1">
lambdaFunction
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda.Function.html"><code class="literal">lambda.Function</code></a>
</td>
<td tabindex="-1">
Returns an instance of the Lambda function created by
the pattern.
</td>
</tr>
<tr>
<td tabindex="-1">
snsTopic
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_sns.Topic.html"><code class="literal">sns.Topic</code></a>
</td>
<td tabindex="-1">
Returns an instance of the SNS topic created by the
pattern.
</td>
</tr>
<tr>
<td tabindex="-1">
vpc?
</td>
<td tabindex="-1">
<a href="https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.IVpc.html"><code class="literal">ec2.IVpc</code></a>
</td>
<td tabindex="-1">
Returns an interface on the VPC used by the pattern (if
any). This may be a VPC created by the pattern or the
VPC supplied to the pattern constructor.
</td>
</tr>
</table></div></div>
<h2 id="default-settings">Default settings</h2>
<p>
Out of the box implementation of the Construct without any
override will set the following defaults:
</p>
<h3 id="aws-lambda-function">AWS Lambda Function</h3>
<div class="itemizedlist">
<ul class="itemizedlist"><li class="listitem">
<p>
Configure limited privilege access IAM role for Lambda
function to access the Firehose Delivery Stream
</p>
</li><li class="listitem">
<p>
Enable reusing connections with Keep-Alive for NodeJs
Lambda function
</p>
</li><li class="listitem">
<p>
Enable X-Ray Tracing
</p>
</li><li class="listitem">
<p>
Set Environment Variables
</p>
<div class="itemizedlist">
<ul class="itemizedlist"><li class="listitem">
<p>
(default) SNS_TOPIC_NAME
</p>
</li><li class="listitem">
<p>
(default) SNS_TOPIC_ARN
</p>
</li><li class="listitem">
<p>
AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and
higher functions)
</p>
</li></ul></div>
</li></ul></div>
<h3 id="amazon-sns-topic">Amazon SNS Topic</h3>
<div class="itemizedlist">
<ul class="itemizedlist"><li class="listitem">
<p>
Configure least privilege access permissions for SNS Topic
</p>
</li><li class="listitem">
<p>
Enable server-side encryption forSNS Topic using AWS
managed KMS Key
</p>
</li><li class="listitem">
<p>
Enforce encryption of data in transit
</p>
</li></ul></div>
<h2 id="w6aab9d129c15">Architecture</h2>
<div class="mediaobject">
<img src="/images/solutions/latest/constructs/images/aws-lambda-sns.png" class="aws-docs-img-whiteBg aws-docs-img-padding" alt="AWS Lambda connected to Amazon Simple Notification Service with IAM role below Lambda." data-alt-text-source="generated" style="max-width:100%" />
</div>
<h2 id="github">GitHub</h2>
<div class="table-container"><div class="table-contents"><table id="w161aab9d129c16b3"><thead>
<tr>
<th colspan="2" align="left" style="text-align: left;">
<b>To view the code for this pattern, create/view issues and pull requests, and more:</b>
</th>
</tr>
</thead>
<tr>
<td tabindex="-1">
<div class="mediaobject">
<img src="/images/solutions/latest/constructs/images/GitHub-Mark-32px.png" class="aws-docs-img-whiteBg aws-docs-img-padding" alt="Circular icon with a graduation cap symbol representing education or learning." data-alt-text-source="generated" style="max-width:100%" />
</div>
</td>
<td tabindex="-1">
<a href="https://github.com/awslabs/aws-solutions-constructs/tree/master/source/patterns/%40aws-solutions-constructs/aws-lambda-sns" rel="noopener noreferrer" target="_blank"><span>@aws-solutions-constructs/aws-lambda-sns</span><awsui-icon class="awsdocs-link-icon" name="external"></awsui-icon></a>
</td>
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