feat(aws-iot-sqs): initial implementation

source/patterns/@aws-solutions-constructs/aws-iot-sqs/.eslintignore

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+lib/*.js
+test/*.js
+*.d.ts
+coverage

source/patterns/@aws-solutions-constructs/aws-iot-sqs/.gitignore

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+lib/*.js
+test/*.js
+*.js.map
+*.d.ts
+node_modules
+*.generated.ts
+dist
+.jsii
+
+.LAST_BUILD
+.nyc_output
+coverage
+.nycrc
+.LAST_PACKAGE
+*.snk

source/patterns/@aws-solutions-constructs/aws-iot-sqs/.npmignore

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+# Exclude typescript source and config
+*.ts
+tsconfig.json
+coverage
+.nyc_output
+*.tgz
+*.snk
+*.tsbuildinfo
+
+# Include javascript files and typescript declarations
+!*.js
+!*.d.ts
+
+# Exclude jsii outdir
+dist
+
+# Include .jsii
+!.jsii
+
+# Include .jsii
+!.jsii

source/patterns/@aws-solutions-constructs/aws-iot-sqs/README.md

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+# aws-iot-sqs module
+<!--BEGIN STABILITY BANNER-->
+
+---
+
+![Stability: Experimental](https://img.shields.io/badge/stability-Experimental-important.svg?style=for-the-badge)
+
+> 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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
+
+---
+<!--END STABILITY BANNER-->
+
+| **Reference Documentation**:| <span style="font-weight: normal">https://docs.aws.amazon.com/solutions/latest/constructs/</span>|
+|:-------------|:-------------|
+<div style="height:8px"></div>
+
+| **Language**     | **Package**        |
+|:-------------|-----------------|
+|![Python Logo](https://docs.aws.amazon.com/cdk/api/latest/img/python32.png) Python|`aws_solutions_constructs.aws_iot_sqs`|
+|![Typescript Logo](https://docs.aws.amazon.com/cdk/api/latest/img/typescript32.png) Typescript|`@aws-solutions-constructs/aws-iot-sqs`|
+|![Java Logo](https://docs.aws.amazon.com/cdk/api/latest/img/java32.png) Java|`software.amazon.awsconstructs.services.iotsqs`|
+
+This AWS Solutions Construct implements an AWS IoT MQTT topic rule and an AWS SQS Queue pattern.
+
+Here is a minimal deployable pattern definition in Typescript:
+
+``` typescript
+const { IotToSqsProps, IotToSqs } from '@aws-solutions-constructs/aws-iot-sqs';
+
+const props: IotToSqsProps = {
+    iotTopicRuleProps: {
+        topicRulePayload: {
+            ruleDisabled: false,
+            description: "Testing the IotToSqs Pattern",
+            sql: "SELECT * FROM 'iot/sqs/#'",
+            actions: []
+        }
+    }
+};
+
+new IotToSqs(this, 'test-iot-sqs-integration', props);
+```
+
+## Initializer
+
+``` text
+new IotToSqs(scope: Construct, id: string, props: IotToSqsProps);
+```
+
+_Parameters_
+
+* scope [`Construct`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_core.Construct.html)
+* id `string`
+* props [`IotToSqsProps`](#pattern-construct-props)
+
+## Pattern Construct Props
+
+| **Name**     | **Type**        | **Description** |
+|:-------------|:----------------|-----------------|
+|existingQueueObj?|[`sqs.Queue`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.Queue.html)|Existing instance of SQS queue object, providing both this and `queueProps` will cause an error.|
+|queueProps?|[`sqs.QueueProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.QueueProps.html)|User provided props to override the default props for the SQS queue.|
+|deadLetterQueueProps?|[`sqs.QueueProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.QueueProps.html)|Optional user provided properties for the dead letter queue.|
+|deployDeadLetterQueue?|`boolean`|Whether to deploy a secondary queue to be used as a dead letter queue. Default `true`.|
+|maxReceiveCount?|`number`|The number of times a message can be unsuccessfully dequeued before being moved to the dead-letter queue. Required field if `deployDeadLetterQueue`=`true`.|
+|enableEncryptionWithCustomerManagedKey?|`boolean`|Use a KMS Key, either managed by this CDK app, or imported. If importing an encryption key, it must be specified in the `encryptionKey` property for this construct.|
+|encryptionKey?|[`kms.Key`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-kms.Key.html)|An optional, imported encryption key to encrypt 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 encryption key.|
+|iotTopicRuleProps?|[`iot.CfnTopicRuleProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-iot.CfnTopicRuleProps.html)|User provided CfnTopicRuleProps to override the defaults|
+
+## Pattern Properties
+
+| **Name**     | **Type**        | **Description** |
+|:-------------|:----------------|-----------------|
+|encryptionKey?|[`kms.Key`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-kms.Key.html)|Returns an instance of `kms.Key` used for the SQS queue.|
+|iotActionsRole|[`iam.Role`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-iam.Role.html)|Returns an instance of `iam.Role` created by the construct, which allows IoT to publish messages to the SQS Queue|
+|sqsQueue|[`sqs.Queue`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.Queue.html)|Returns an instance of `sqs.Queue` created by the construct|
+|deadLetterQueue?|[`sqs.Queue`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-sqs.Queue.html)|Returns an instance of the dead-letter SQS queue created by the pattern.|
+|iotTopicRule|[`iot.CfnTopicRule`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-iot.CfnTopicRule.html)|Returns an instance of `iot.CfnTopicRule` created by the construct|
+
+## Default settings
+
+Out of the box implementation of the Construct without any override will set the following defaults:
+
+### Amazon IoT Rule
+* Configure an IoT Rule to send messages to the SQS Queue
+
+### Amazon IAM Role
+* Configure least privilege access IAM role for Amazon IoT to be able to publish messages to the SQS Queue
+
+### Amazon SQS Queue
+* Deploy a dead-letter queue for the source queue. 
+* Enable server-side encryption for the source queue using a customer-managed AWS KMS key.
+* Enforce encryption of data in transit. 
+
+## Architecture
+![Architecture Diagram](architecture.png)
+
+***
+&copy; Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.

source/patterns/@aws-solutions-constructs/aws-iot-sqs/lib/index.ts

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+/**
+ *  Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance
+ *  with the License. A copy of the License is located at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  or in the 'license' file accompanying this file. This file is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES
+ *  OR CONDITIONS OF ANY KIND, express or implied. See the License for the specific language governing permissions
+ *  and limitations under the License.
+ */
+
+import * as cdk from '@aws-cdk/core';
+import * as sqs from '@aws-cdk/aws-sqs';
+import * as iot from '@aws-cdk/aws-iot';
+import * as kms from '@aws-cdk/aws-kms';
+import * as iam from '@aws-cdk/aws-iam';
+import * as defaults from '@aws-solutions-constructs/core';
+
+/**
+ * @summary The properties for the IotToSqs class.
+ */
+export interface IotToSqsProps {
+  /**
+   * Existing instance of SQS queue object, providing both this and queueProps will cause an error.
+   *
+   * @default - None
+   */
+  readonly existingQueueObj?: sqs.Queue;
+
+  /**
+   * User provided props to override the default props for the SQS queue.
+   *
+   * @default - Default props are used
+   */
+  readonly queueProps?: sqs.QueueProps;
+
+  /**
+   * Optional user provided properties for the dead letter queue
+   *
+   * @default - Default props are used
+   */
+  readonly deadLetterQueueProps?: sqs.QueueProps;
+
+  /**
+   * Whether to deploy a secondary queue to be used as a dead letter queue.
+   *
+   * @default - true.
+   */
+  readonly deployDeadLetterQueue?: boolean;
+
+  /**
+   * The number of times a message can be unsuccessfully dequeued before being moved to the dead-letter queue.
+   *
+   * @default - required field if deployDeadLetterQueue=true.
+   */
+  readonly maxReceiveCount?: number;
+
+  /**
+   * Use a KMS Key, either managed by this CDK app, or imported. If importing an encryption key, it must be specified in
+   * the encryptionKey property for this construct.
+   *
+   * @default - true (encryption enabled, managed by this CDK app).
+   */
+  readonly enableEncryptionWithCustomerManagedKey?: boolean;
+
+  /**
+   * An optional, imported encryption key to encrypt the SQS queue, and SNS Topic.
+   *
+   * @default - not specified.
+   */
+  readonly encryptionKey?: kms.Key;
+
+  /**
+   * Optional user-provided props to override the default props for the encryption key.
+   *
+   * @default - Default props are used.
+   */
+  readonly encryptionKeyProps?: kms.KeyProps;
+
+  /**
+   * User provided CfnTopicRuleProps to override the defaults
+   *
+   * @default - None
+   */
+  readonly iotTopicRuleProps: iot.CfnTopicRuleProps;
+}
+
+export class IotToSqs extends cdk.Construct {
+  public readonly sqsQueue: sqs.Queue;
+  public readonly deadLetterQueue?: sqs.DeadLetterQueue;
+  public readonly encryptionKey?: kms.IKey;
+  public readonly iotActionsRole: iam.Role;
+  public readonly iotTopicRule: iot.CfnTopicRule;
+
+  /**
+   * @summary Constructs a new instance of the IotToSqs class.
+   * @param {cdk.App} scope - represents the scope for all the resources.
+   * @param {string} id - this is a a scope-unique id.
+   * @param {IotToSqsProps} props - user provided props for the construct
+   * @access public
+   */
+  constructor(scope: cdk.Construct, id: string, props: IotToSqsProps) {
+    super(scope, id);
+    defaults.CheckProps(props);
+
+    // Setup the dead letter queue, if applicable
+    this.deadLetterQueue = defaults.buildDeadLetterQueue(this, {
+      existingQueueObj: props.existingQueueObj,
+      deployDeadLetterQueue: props.deployDeadLetterQueue,
+      deadLetterQueueProps: props.deadLetterQueueProps,
+      maxReceiveCount: props.maxReceiveCount
+    });
+
+    // Default to `true` if `enableEncryptionWithCustomerManagedKey` is undefined
+    let enableEncryptionWithCustomerManagedKey = props.enableEncryptionWithCustomerManagedKey;
+    if (enableEncryptionWithCustomerManagedKey === undefined) {
+      enableEncryptionWithCustomerManagedKey = true;
+    }
+
+    // Setup the queue
+    [this.sqsQueue, this.encryptionKey] = defaults.buildQueue(this, 'queue', {
+      existingQueueObj: props.existingQueueObj,
+      queueProps: props.queueProps,
+      deadLetterQueue: this.deadLetterQueue,
+      enableEncryptionWithCustomerManagedKey,
+      encryptionKey: props.encryptionKey,
+      encryptionKeyProps: props.encryptionKeyProps
+    });
+
+    if (this.sqsQueue.fifo) {
+      throw new Error('The IoT SQS action doesn\'t support Amazon SQS FIFO (First-In-First-Out) queues');
+    }
+
+    // Role to allow IoT to send messages to the SQS Queue
+    this.iotActionsRole = new iam.Role(this, 'iot-actions-role', {
+      assumedBy: new iam.ServicePrincipal('iot.amazonaws.com')
+    });
+    this.sqsQueue.grantSendMessages(this.iotActionsRole);
+
+    if (this.encryptionKey) {
+      this.encryptionKey.grantEncrypt(this.iotActionsRole);
+    }
+
+    const defaultIotTopicProps = defaults.DefaultCfnTopicRuleProps([{
+      sqs: {
+        queueUrl: this.sqsQueue.queueUrl,
+        roleArn: this.iotActionsRole.roleArn
+      }
+    }]);
+    const iotTopicProps = defaults.overrideProps(defaultIotTopicProps, props.iotTopicRuleProps, true);
+
+    // Create the IoT topic rule
+    this.iotTopicRule = new iot.CfnTopicRule(this, 'IotTopicRule', iotTopicProps);
+  }
+}