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@aws-sdk/client-servicediscovery

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@aws-sdk/client-servicediscovery

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

  • 3.696.0
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@aws-sdk/client-servicediscovery

Description

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

Cloud Map

With Cloud Map, you can configure public DNS, private DNS, or HTTP namespaces that your microservice applications run in. When an instance becomes available, you can call the Cloud Map API to register the instance with Cloud Map. For public or private DNS namespaces, Cloud Map automatically creates DNS records and an optional health check. Clients that submit public or private DNS queries, or HTTP requests, for the service receive an answer that contains up to eight healthy records.

Installing

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

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

Getting Started

Import

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

// ES5 example
const { ServiceDiscoveryClient, ListNamespacesCommand } = require("@aws-sdk/client-servicediscovery");
// ES6+ example
import { ServiceDiscoveryClient, ListNamespacesCommand } from "@aws-sdk/client-servicediscovery";

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 ServiceDiscoveryClient({ region: "REGION" });

const params = {
  /** input parameters */
};
const command = new ListNamespacesCommand(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-servicediscovery";
const client = new AWS.ServiceDiscovery({ region: "REGION" });

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

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

// callbacks.
client.listNamespaces(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-servicediscovery 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)

CreateHttpNamespace

Command API Reference / Input / Output

CreatePrivateDnsNamespace

Command API Reference / Input / Output

CreatePublicDnsNamespace

Command API Reference / Input / Output

CreateService

Command API Reference / Input / Output

DeleteNamespace

Command API Reference / Input / Output

DeleteService

Command API Reference / Input / Output

DeregisterInstance

Command API Reference / Input / Output

DiscoverInstances

Command API Reference / Input / Output

DiscoverInstancesRevision

Command API Reference / Input / Output

GetInstance

Command API Reference / Input / Output

GetInstancesHealthStatus

Command API Reference / Input / Output

GetNamespace

Command API Reference / Input / Output

GetOperation

Command API Reference / Input / Output

GetService

Command API Reference / Input / Output

ListInstances

Command API Reference / Input / Output

ListNamespaces

Command API Reference / Input / Output

ListOperations

Command API Reference / Input / Output

ListServices

Command API Reference / Input / Output

ListTagsForResource

Command API Reference / Input / Output

RegisterInstance

Command API Reference / Input / Output

TagResource

Command API Reference / Input / Output

UntagResource

Command API Reference / Input / Output

UpdateHttpNamespace

Command API Reference / Input / Output

UpdateInstanceCustomHealthStatus

Command API Reference / Input / Output

UpdatePrivateDnsNamespace

Command API Reference / Input / Output

UpdatePublicDnsNamespace

Command API Reference / Input / Output

UpdateService

Command API Reference / Input / Output

FAQs

Package last updated on 19 Nov 2024

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