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Route53 Recovery Cluster Client - AWS SDK for JavaScript v3

@aws-sdk/client-route53-recovery-cluster

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Description

AWS SDK for JavaScript Route53RecoveryCluster Client for Node.js, Browser and React Native.

Welcome to the Routing Control (Recovery Cluster) API Reference Guide for Amazon Route 53 Application Recovery Controller.

With Route 53 ARC, you can use routing control with extreme reliability to recover applications by rerouting traffic across Availability Zones or Amazon Web Services Regions. Routing controls are simple on/off switches hosted on a highly available cluster in Route 53 ARC. A cluster provides a set of five redundant Regional endpoints against which you can run API calls to get or update the state of routing controls. To implement failover, you set one routing control On and another one Off, to reroute traffic from one Availability Zone or Amazon Web Services Region to another.

Be aware that you must specify a Regional endpoint for a cluster when you work with API cluster operations to get or update routing control states in Route 53 ARC. In addition, you must specify the US West (Oregon) Region for Route 53 ARC API calls. For example, use the parameter --region us-west-2 with AWS CLI commands. For more information, see Get and update routing control states using the API in the Amazon Route 53 Application Recovery Controller Developer Guide.

This API guide includes information about the API operations for how to get and update routing control states in Route 53 ARC. To work with routing control in Route 53 ARC, you must first create the required components (clusters, control panels, and routing controls) using the recovery cluster configuration API.

For more information about working with routing control in Route 53 ARC, see the following:

Installing

To install the this package, simply type add or install @aws-sdk/client-route53-recovery-cluster using your favorite package manager:

  • npm install @aws-sdk/client-route53-recovery-cluster
  • yarn add @aws-sdk/client-route53-recovery-cluster
  • pnpm add @aws-sdk/client-route53-recovery-cluster

Getting Started

Import

The AWS SDK is modulized by clients and commands. To send a request, you only need to import the Route53RecoveryClusterClient and the commands you need, for example GetRoutingControlStateCommand:

// ES5 example
const {
  Route53RecoveryClusterClient,
  GetRoutingControlStateCommand,
} = require("@aws-sdk/client-route53-recovery-cluster");
// ES6+ example
import { Route53RecoveryClusterClient, GetRoutingControlStateCommand } from "@aws-sdk/client-route53-recovery-cluster";

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.
// a client can be shared by different commands.
const client = new Route53RecoveryClusterClient({ region: "REGION" });

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

Async/await

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

// 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 to execute send operation.

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

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

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

Callbacks

We do not recommend using callbacks because of callback hell, but they are supported by the send operation.

// 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

import * as AWS from "@aws-sdk/client-route53-recovery-cluster";
const client = new AWS.Route53RecoveryCluster({ region: "REGION" });

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

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

// callbacks.
client.getRoutingControlState(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).

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.

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-route53-recovery-cluster 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.