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@aws-sdk/client-keyspacesstreams

clients/client-keyspacesstreams/README.md

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@aws-sdk/client-keyspacesstreams

Description

AWS SDK for JavaScript KeyspacesStreams Client for Node.js, Browser and React Native.

<p>Amazon Keyspaces (for Apache Cassandra) change data capture (CDC) records change events for Amazon Keyspaces tables. The change events captured in a stream are time-ordered and de-duplicated write operations. Using stream data you can build event driven applications that incorporate near-real time change events from Amazon Keyspaces tables. </p> <p>Amazon Keyspaces CDC is serverless and scales the infrastructure for change events automatically based on the volume of changes on your table. </p> <p> This API reference describes the Amazon Keyspaces CDC stream API in detail. </p> <p>For more information about Amazon Keyspaces CDC, see <a href="https://docs.aws.amazon.com/keyspaces/latest/devguide/cdc.html">Working with change data capture (CDC) streams in Amazon Keyspaces</a> in the <i>Amazon Keyspaces Developer Guide</i>.</p> <p>To learn how Amazon Keyspaces CDC API actions are recorded with CloudTrail, see <a href="https://docs.aws.amazon.com/keyspaces/latest/devguide/logging-using-cloudtrail.html#service-name-info-in-cloudtrail">Amazon Keyspaces information in CloudTrail</a> in the <i>Amazon Keyspaces Developer Guide</i>.</p> <p>To see the metrics Amazon Keyspaces CDC sends to Amazon CloudWatch, see <a href="https://docs.aws.amazon.com/keyspaces/latest/devguide/metrics-dimensions.html#keyspaces-cdc-metrics">Amazon Keyspaces change data capture (CDC) CloudWatch metrics</a> in the <i>Amazon Keyspaces Developer Guide</i>.</p>

Installing

To install this package, use the CLI of your favorite package manager:

  • npm install @aws-sdk/client-keyspacesstreams
  • yarn add @aws-sdk/client-keyspacesstreams
  • pnpm add @aws-sdk/client-keyspacesstreams

Getting Started

Import

The AWS SDK is modulized by clients and commands. To send a request, you only need to import the KeyspacesStreamsClient and the commands you need, for example ListStreamsCommand:

js
// ES5 example
const { KeyspacesStreamsClient, ListStreamsCommand } = require("@aws-sdk/client-keyspacesstreams");
ts
// ES6+ example
import { KeyspacesStreamsClient, ListStreamsCommand } from "@aws-sdk/client-keyspacesstreams";

Usage

To send a request:

  • Instantiate a client with configuration (e.g. credentials, region).
  • Instantiate a command with input parameters.
  • Call the send operation on the client, providing the command object as input.
js
const client = new KeyspacesStreamsClient({ region: "REGION" });

const params = { /** input parameters */ };
const command = new ListStreamsCommand(params);

Async/await

We recommend using the await operator to wait for the promise returned by send operation as follows:

js
// async/await.
try {
  const data = await client.send(command);
  // process data.
} catch (error) {
  // error handling.
} finally {
  // finally.
}

Promises

You can also use Promise chaining.

js
client
  .send(command)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  })
  .finally(() => {
    // finally.
  });

Aggregated client

The aggregated client class is exported from the same package, but without the "Client" suffix.

KeyspacesStreams extends KeyspacesStreamsClient and additionally supports all operations, waiters, and paginators as methods. This style may be familiar to you from the AWS SDK for JavaScript v2.

If you are bundling the AWS SDK, we recommend using only the bare-bones client (KeyspacesStreamsClient). More details are in the blog post on modular packages in AWS SDK for JavaScript.

ts
import { KeyspacesStreams } from "@aws-sdk/client-keyspacesstreams";

const client = new KeyspacesStreams({ region: "REGION" });

// async/await.
try {
  const data = await client.listStreams(params);
  // process data.
} catch (error) {
  // error handling.
}

// Promises.
client
  .listStreams(params)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  });

// callbacks (not recommended).
client.listStreams(params, (err, data) => {
  // process err and data.
});

Troubleshooting

When the service returns an exception, the error will include the exception information, as well as response metadata (e.g. request id).

js
try {
  const data = await client.send(command);
  // process data.
} catch (error) {
  const { requestId, cfId, extendedRequestId } = error.$metadata;
  console.log({ requestId, cfId, extendedRequestId });
  /**
   * The keys within exceptions are also parsed.
   * You can access them by specifying exception names:
   * if (error.name === 'SomeServiceException') {
   *     const value = error.specialKeyInException;
   * }
   */
}

See also docs/ERROR_HANDLING.

Getting Help

Please use these community resources for getting help. We use GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.

To test your universal JavaScript code in Node.js, browser and react-native environments, visit our code samples repo.

Contributing

This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-keyspacesstreams package is updated. To contribute to client you can check our generate clients scripts.

License

This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.

Client Commands (Operations List)

<details> <summary> GetRecords </summary>

Command API Reference / Input / Output

</details> <details> <summary> GetShardIterator </summary>

Command API Reference / Input / Output

</details> <details> <summary> GetStream </summary>

Command API Reference / Input / Output

</details> <details> <summary> ListStreams </summary>

Command API Reference / Input / Output

</details>