aws-solutions-konstruk.aws-sqs-lambda 0.8.1
CDK constructs for defining an interaction between an Amazon SQS queue and an AWS Lambda function.
License: Apache-2.0
Requires Python: >=3.6

# aws-sqs-lambda module

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> **This is a *developer preview* (public beta) module.**
>
> 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](https://semver.org/) 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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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| **API Reference**:| <span style="font-weight: normal">http://docs.awssolutionsbuilder.com/aws-solutions-konstruk/latest/api/aws-sqs-lambda/</span>|
|:-------------|:-------------|

<div style="height:8px"></div>

| **Language**     | **Package**        |
|:-------------|-----------------|
|![Python Logo](https://docs.aws.amazon.com/cdk/api/latest/img/python32.png){: style="height:16px;width:16px"} Python|`aws_solutions_konstruk.aws_sns_lambda`|
|![Typescript Logo](https://docs.aws.amazon.com/cdk/api/latest/img/typescript32.png){: style="height:16px;width:16px"} Typescript|`@aws-solutions-konstruk/aws-sns-lambda`|

This AWS Solutions Konstruk implements an Amazon SQS queue connected to an AWS Lambda function.

Here is a minimal deployable pattern definition:

```javascript
const { SqsToLambda } = require('@aws-solutions-konstruk/aws-sqs-lambda');

new SqsToLambda(stack, 'SqsToLambdaPattern', {
    deployLambda: true,
    lambdaFunctionProps: {
        runtime: lambda.Runtime.NODEJS_10_X,
        handler: 'index.handler',
        code: lambda.Code.asset(`${__dirname}/lambda`)
    }
});

```

## Initializer

```text
new SqsToLambda(scope: Construct, id: string, props: SqsToLambdaProps);
```

*Parameters*

* scope [`Construct`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_core.Construct.html)
* id `string`
* props [`SqsToLambdaProps`](#pattern-construct-props)

## Pattern Construct Props

| **Name**     | **Type**        | **Description** |
|:-------------|:----------------|-----------------|
|deployLambda|`boolean`|Whether to create a new Lambda function or use an existing Lambda function.|
|existingLambdaObj?|[`lambda.Function`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-lambda.Function.html)|An optional, existing Lambda function.|
|lambdaFunctionProps?|[`lambda.FunctionProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-lambda.FunctionProps.html)|Optional user-provided props to override the default props for the Lambda function.|
|queueProps?|[`sqs.QueueProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.QueueProps.html)|Optional user-provided props to override the default props for the SQS queue.|
|encryptionKeyProps?|[`kms.KeyProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-kms.KeyProps.html)|Optional user-provided props to override the default props for the KMS encryption key.|
|deployDeadLetterQueue?|`boolean`|Whether to create a secondary queue to be used as a dead letter queue. Defaults to true.|
|maxReceiveCount?|`number`|The number of times a message can be unsuccesfully dequeued before being moved to the dead letter queue. Defaults to 15.|

## Pattern Properties

| **Name**     | **Type**        | **Description** |
|:-------------|:----------------|-----------------|
|lambdaFunction()|[`lambda.Function`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-lambda.Function.html)|Returns an instance of the Lambda function created by the pattern.|
|sqsQueue()|[`sqs.Queue`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.Queue.html)|Returns an instance of the SQS queue created by the pattern.|

## Architecture

![Architecture Diagram](architecture.png)

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