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# @aws-sdk/client-migrationhub-config

## Description

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

<p>The AWS Migration Hub home region APIs are available specifically for working with your
Migration Hub home region. You can use these APIs to determine a home region, as well as to
create and work with controls that describe the home region.</p>

<ul>
<li>
<p>You must make API calls for write actions (create, notify, associate, disassociate,
import, or put) while in your home region, or a <code>HomeRegionNotSetException</code>
error is returned.</p>
</li>
<li>
<p>API calls for read actions (list, describe, stop, and delete) are permitted outside of
your home region.</p>
</li>
<li>
<p>If you call a write API outside the home region, an <code>InvalidInputException</code>
is returned.</p>
</li>
<li>
<p>You can call <code>GetHomeRegion</code> action to obtain the account's Migration Hub
home region.</p>
</li>
</ul>

<p>For specific API usage, see the sections that follow in this AWS Migration Hub Home Region
API reference. </p>

## Installing

To install the this package, simply type add or install @aws-sdk/client-migrationhub-config
using your favorite package manager:

- `npm install @aws-sdk/client-migrationhub-config`
- `yarn add @aws-sdk/client-migrationhub-config`
- `pnpm add @aws-sdk/client-migrationhub-config`

## Getting Started

### Import

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

```js
// ES5 example
const { MigrationHubConfigClient, CreateHomeRegionControlCommand } = require("@aws-sdk/client-migrationhub-config");
```

```ts
// ES6+ example
import { MigrationHubConfigClient, CreateHomeRegionControlCommand } from "@aws-sdk/client-migrationhub-config";
```

### Usage

To send a request, you:

- Initiate client with configuration (e.g. credentials, region).
- Initiate command with input parameters.
- Call `send` operation on client with command object as input.
- If you are using a custom http handler, you may call `destroy()` to close open connections.

```js
// a client can be shared by different commands.
const client = new MigrationHubConfigClient({ region: "REGION" });

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

#### Async/await

We recommend using [await](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/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.
}
```

Async-await is clean, concise, intuitive, easy to debug and has better error handling
as compared to using Promise chains or callbacks.

#### Promises

You can also use [Promise chaining](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises#chaining)
to execute send operation.

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

Promises can also be called using `.catch()` and `.finally()` as follows:

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

#### Callbacks

We do not recommend using callbacks because of [callback hell](http://callbackhell.com/),
but they are supported by the send operation.

```js
// callbacks.
client.send(command, (err, data) => {
  // process err and data.
});
```

#### v2 compatible style

The client can also send requests using v2 compatible style.
However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post
on [modular packages in AWS SDK for JavaScript](https://aws.amazon.com/blogs/developer/modular-packages-in-aws-sdk-for-javascript/)

```ts
import * as AWS from "@aws-sdk/client-migrationhub-config";
const client = new AWS.MigrationHubConfig({ region: "REGION" });

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

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

// callbacks.
client.createHomeRegionControl(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;
   * }
   */
}
```

## Getting Help

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

- Visit [Developer Guide](https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/welcome.html)
  or [API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/index.html).
- Check out the blog posts tagged with [`aws-sdk-js`](https://aws.amazon.com/blogs/developer/tag/aws-sdk-js/)
  on AWS Developer Blog.
- Ask a question on [StackOverflow](https://stackoverflow.com/questions/tagged/aws-sdk-js) and tag it with `aws-sdk-js`.
- Join the AWS JavaScript community on [gitter](https://gitter.im/aws/aws-sdk-js-v3).
- If it turns out that you may have found a bug, please [open an issue](https://github.com/aws/aws-sdk-js-v3/issues/new/choose).

To test your universal JavaScript code in Node.js, browser and react-native environments,
visit our [code samples repo](https://github.com/aws-samples/aws-sdk-js-tests).

## Contributing

This client code is generated automatically. Any modifications will be overwritten the next time the `@aws-sdk/client-migrationhub-config` package is updated.
To contribute to client you can check our [generate clients scripts](https://github.com/aws/aws-sdk-js-v3/tree/main/scripts/generate-clients).

## License

This SDK is distributed under the
[Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0),
see LICENSE for more information.

## Client Commands (Operations List)

<details>
<summary>
CreateHomeRegionControl
</summary>

[Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/classes/createhomeregioncontrolcommand.html) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/interfaces/createhomeregioncontrolcommandinput.html) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/interfaces/createhomeregioncontrolcommandoutput.html)

</details>
<details>
<summary>
DescribeHomeRegionControls
</summary>

[Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/classes/describehomeregioncontrolscommand.html) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/interfaces/describehomeregioncontrolscommandinput.html) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/interfaces/describehomeregioncontrolscommandoutput.html)

</details>
<details>
<summary>
GetHomeRegion
</summary>

[Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/classes/gethomeregioncommand.html) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/interfaces/gethomeregioncommandinput.html) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-migrationhub-config/interfaces/gethomeregioncommandoutput.html)

</details>