@aws-sdk/middleware-eventstream

What is @aws-sdk/middleware-eventstream?

@aws-sdk/middleware-eventstream is a middleware package for the AWS SDK for JavaScript. It provides functionality to handle event streams, which are used in various AWS services to deliver real-time data. This package is essential for working with services that use event streams, such as AWS Transcribe, AWS Kinesis, and others.

What are @aws-sdk/middleware-eventstream's main functionalities?

Event Stream Handling

This feature allows you to handle event streams by marshalling data into the event stream format. The code sample demonstrates how to create an event stream using the EventStreamMarshaller.

const { EventStreamMarshaller } = require('@aws-sdk/middleware-eventstream');

const marshaller = new EventStreamMarshaller();

const eventStream = marshaller.marshall({
  headers: {},
  body: Buffer.from('example event data')
});

console.log(eventStream);

Event Stream Unmarshalling

This feature allows you to unmarshall event streams back into their original data format. The code sample demonstrates how to unmarshall an event stream using the EventStreamMarshaller.

const { EventStreamMarshaller } = require('@aws-sdk/middleware-eventstream');

const marshaller = new EventStreamMarshaller();

const eventStream = Buffer.from('example event stream');
const event = marshaller.unmarshall(eventStream);

console.log(event);

Other packages similar to @aws-sdk/middleware-eventstream

event-stream

The event-stream package is a toolkit for working with streams in Node.js. It provides a variety of utilities for creating and manipulating streams, including event streams. Compared to @aws-sdk/middleware-eventstream, event-stream is more general-purpose and not specifically tailored for AWS services.

kinesis-client-library

The kinesis-client-library is a package for working with Amazon Kinesis streams. It provides high-level abstractions for consuming and processing data from Kinesis streams. While it focuses specifically on Kinesis, it offers similar event stream handling capabilities as @aws-sdk/middleware-eventstream.

README

@aws-sdk/middleware-eventstream

Changelog

3.208.0 (2022-11-10)

Bug Fixes

• aws-client-api-test: rename package (#4165) (2e13b67)
• types: add client config interface test with s3 example (#4156) (7811cd9)

Features

• client-ec2: This release adds a new price capacity optimized allocation strategy for Spot Instances to help customers optimize provisioning of Spot Instances via EC2 Auto Scaling, EC2 Fleet, and Spot Fleet. It allocates Spot Instances based on both spare capacity availability and Spot Instance price. (6f4d604)
• client-ecs: This release adds support for task scale-in protection with updateTaskProtection and getTaskProtection APIs. UpdateTaskProtection API can be used to protect a service managed task from being terminated by scale-in events and getTaskProtection API to get the scale-in protection status of a task. (a5eede0)
• client-elasticsearch-service: Amazon OpenSearch Service now offers managed VPC endpoints to connect to your Amazon OpenSearch Service VPC-enabled domain in a Virtual Private Cloud (VPC). This feature allows you to privately access OpenSearch Service domain without using public IPs or requiring traffic to traverse the Internet. (f36b021)
• client-scheduler: AWS introduces the new Amazon EventBridge Scheduler. EventBridge Scheduler is a serverless scheduler that allows you to create, run, and manage tasks from one central, managed service. (8829f71)
• clients: update client endpoints as of 2022-11-10 (c01499d)
• private: add server artifacts (#4159) (e70f472)