@aws-sdk/client-servicediscovery-node
Description
AWS Cloud Map lets you configure public DNS, private DNS, or HTTP namespaces that your microservice applications run in. When an instance of the service becomes available, you can call the AWS Cloud Map API to register the instance with AWS Cloud Map. For public or private DNS namespaces, AWS 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 the this package using NPM, simply type the following into a terminal window:
npm install @aws-sdk/client-servicediscovery-node
Getting Started
Import
The AWS SDK is modulized by clients and commands in CommonJS modules. To send a request, you only need to import the client(ServiceDiscoveryClient
) and the commands you need, for example CreateHttpNamespaceCommand
:
//JavaScript
const {
ServiceDiscoveryClient
} = require("@aws-sdk/client-servicediscovery-node/ServiceDiscoveryClient");
const {
CreateHttpNamespaceCommand
} = require("@aws-sdk/client-servicediscovery-node/commands/CreateHttpNamespaceCommand");
//TypeScript
import { ServiceDiscoveryClient } from "@aws-sdk/client-servicediscovery-node/ServiceDiscoveryClient";
import { CreateHttpNamespaceCommand } from "@aws-sdk/client-servicediscovery-node/commands/CreateHttpNamespaceCommand";
Usage
To send a request, you:
- Initiate client with configuration (e.g. credentials, region). For more information you can refer to the API reference.
- 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.
const serviceDiscovery = new ServiceDiscoveryClient({region: 'region'});
//clients can be shared by different commands
const params = {
Name: /**a string value*/,
};
const createHttpNamespaceCommand = new CreateHttpNamespaceCommand(params);
serviceDiscovery.send(createHttpNamespaceCommand).then(data => {
// do something
}).catch(error => {
// error handling
})
In addition to using promises, there are 2 other ways to send a request:
// async/await
try {
const data = await serviceDiscovery.send(createHttpNamespaceCommand);
// do something
} catch (error) {
// error handling
}
// callback
serviceDiscovery.send(createHttpNamespaceCommand, (err, data) => {
//do something
});
The SDK can also send requests using the simplified callback style from version 2 of the SDK.
import * as AWS from "@aws-sdk/@aws-sdk/client-servicediscovery-node/ServiceDiscovery";
const serviceDiscovery = new AWS.ServiceDiscovery({ region: "region" });
serviceDiscovery.createHttpNamespace(params, (err, data) => {
//do something
});
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 serviceDiscovery.send(createHttpNamespaceCommand);
// do something
} catch (error) {
const metadata = error.$metadata;
console.log(
`requestId: ${metadata.requestId}
cfId: ${metadata.cfId}
extendedRequestId: ${metadata.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 and have limited bandwidth to address them.
- Ask a question on StackOverflow and tag it with
aws-sdk-js
- Come join the AWS JavaScript community on gitter
- If it turns out that you may have found a bug, please open an issue
Contributing
This client code is generated automatically. Any modifications will be overwritten the next time the `@aws-sdk/@aws-sdk/client-servicediscovery-node' package is updated. To contribute to SDK you can checkout our code generator package.
License
This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.