agent-claw: automated task changes
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cdk/node_modules/aws-cdk-lib/aws-sqs/README.md
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# Amazon Simple Queue Service Construct Library
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Amazon Simple Queue Service (SQS) is a fully managed message queuing service that
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enables you to decouple and scale microservices, distributed systems, and serverless
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applications. SQS eliminates the complexity and overhead associated with managing and
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operating message oriented middleware, and empowers developers to focus on differentiating work.
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Using SQS, you can send, store, and receive messages between software components at any volume,
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without losing messages or requiring other services to be available.
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## Installation
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Import to your project:
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```ts nofixture
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import * as sqs from 'aws-cdk-lib/aws-sqs';
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```
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## Basic usage
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Here's how to add a basic queue to your application:
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```ts
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new sqs.Queue(this, 'Queue');
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```
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## Encryption
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By default queues are encrypted using SSE-SQS. If you want to change the encryption mode, set the `encryption` property.
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The following encryption modes are supported:
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* KMS key that SQS manages for you
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* KMS key that you can managed yourself
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* Server-side encryption managed by SQS (SSE-SQS)
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* Unencrypted
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To learn more about SSE-SQS on Amazon SQS, please visit the
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[Amazon SQS documentation](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-server-side-encryption.html).
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```ts
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// Use managed key
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new sqs.Queue(this, 'Queue', {
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encryption: sqs.QueueEncryption.KMS_MANAGED,
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});
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// Use custom key
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const myKey = new kms.Key(this, 'Key');
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new sqs.Queue(this, 'Queue', {
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encryption: sqs.QueueEncryption.KMS,
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encryptionMasterKey: myKey,
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});
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// Use SQS managed server side encryption (SSE-SQS)
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new sqs.Queue(this, 'Queue', {
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encryption: sqs.QueueEncryption.SQS_MANAGED,
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});
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// Unencrypted queue
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new sqs.Queue(this, 'Queue', {
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encryption: sqs.QueueEncryption.UNENCRYPTED,
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});
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```
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## Encryption in transit
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If you want to enforce encryption of data in transit, set the `enforceSSL` property to `true`.
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A resource policy statement that allows only encrypted connections over HTTPS (TLS)
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will be added to the queue.
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```ts
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new sqs.Queue(this, 'Queue', {
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enforceSSL: true,
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});
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```
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## First-In-First-Out (FIFO) queues
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FIFO queues give guarantees on the order in which messages are dequeued, and have additional
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features in order to help guarantee exactly-once processing. For more information, see
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the SQS manual. Note that FIFO queues are not available in all AWS regions.
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A queue can be made a FIFO queue by either setting `fifo: true`, giving it a name which ends
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in `".fifo"`, or by enabling a FIFO specific feature such as: content-based deduplication,
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deduplication scope or fifo throughput limit.
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## Dead letter source queues permission
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You can configure the permission settings for queues that can designate the created queue as their dead-letter queue using the `redriveAllowPolicy` attribute.
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By default, all queues within the same account and region are permitted as source queues.
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```ts
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declare const sourceQueue: sqs.IQueue;
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// Only the sourceQueue can specify this queue as the dead-letter queue.
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const queue1 = new sqs.Queue(this, 'Queue2', {
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redriveAllowPolicy: {
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sourceQueues: [sourceQueue],
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}
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});
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// No source queues can specify this queue as the dead-letter queue.
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const queue2 = new sqs.Queue(this, 'Queue', {
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redriveAllowPolicy: {
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redrivePermission: sqs.RedrivePermission.DENY_ALL,
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}
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});
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```
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