AWS SDK for JavaScript EMRServerless Client for Node.js, Browser and React Native.
Amazon EMR Serverless is a new deployment option for Amazon EMR. EMR Serverless provides a serverless runtime environment that simplifies running analytics applications using the latest open source frameworks such as Apache Spark and Apache Hive. With EMR Serverless, you don’t have to configure, optimize, secure, or operate clusters to run applications with these frameworks.
The API reference to Amazon EMR Serverless is emr-serverless
. The
emr-serverless
prefix is used in the following scenarios:
It is the prefix in the CLI commands for Amazon EMR Serverless. For example,
aws emr-serverless start-job-run
.
It is the prefix before IAM policy actions for Amazon EMR Serverless. For example,
"Action": ["emr-serverless:StartJobRun"]
. For more information, see
Policy actions for Amazon EMR Serverless.
It is the prefix used in Amazon EMR Serverless service endpoints. For example,
emr-serverless.us-east-2.amazonaws.com
.
To install the this package, simply type add or install @aws-sdk/client-emr-serverless using your favorite package manager:
npm install @aws-sdk/client-emr-serverless
yarn add @aws-sdk/client-emr-serverless
pnpm add @aws-sdk/client-emr-serverless
The AWS SDK is modulized by clients and commands.
To send a request, you only need to import the EMRServerlessClient
and
the commands you need, for example CancelJobRunCommand
:
// ES5 example
const { EMRServerlessClient, CancelJobRunCommand } = require("@aws-sdk/client-emr-serverless");
// ES6+ example
import { EMRServerlessClient, CancelJobRunCommand } from "@aws-sdk/client-emr-serverless";
To send a request, you:
send
operation on client with command object as input.destroy()
to close open connections.// a client can be shared by different commands.
const client = new EMRServerlessClient({ region: "REGION" });
const params = {
/** input parameters */
};
const command = new CancelJobRunCommand(params);
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.
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.
});
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.
});
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-emr-serverless";
const client = new AWS.EMRServerless({ region: "REGION" });
// async/await.
try {
const data = await client.cancelJobRun(params);
// process data.
} catch (error) {
// error handling.
}
// Promises.
client
.cancelJobRun(params)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
});
// callbacks.
client.cancelJobRun(params, (err, data) => {
// process err and data.
});
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;
* }
*/
}
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.
aws-sdk-js
on AWS Developer Blog.aws-sdk-js
.To test your universal JavaScript code in Node.js, browser and react-native environments, visit our code samples repo.
This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-emr-serverless
package is updated.
To contribute to client you can check our generate clients scripts.
This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.