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@aws-amplify/pubsub

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@aws-amplify/pubsub

Pubsub category of aws-amplify

  • 1.0.17
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
348K
decreased by-14.82%
Maintainers
7
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Created

What is @aws-amplify/pubsub?

@aws-amplify/pubsub is a part of the AWS Amplify library that provides a simple and powerful way to work with real-time messaging and event-driven architectures. It allows you to publish and subscribe to messages using AWS IoT, AWS AppSync, and other supported providers.

What are @aws-amplify/pubsub's main functionalities?

Publishing Messages

This feature allows you to publish messages to a specific topic. In this example, a message is published to 'myTopic' with the content 'Hello to all subscribers!'.

const { PubSub } = require('@aws-amplify/pubsub');

async function publishMessage() {
  await PubSub.publish('myTopic', { msg: 'Hello to all subscribers!' });
}

publishMessage();

Subscribing to Messages

This feature allows you to subscribe to a specific topic and receive messages. In this example, the subscription listens to 'myTopic' and logs any received messages.

const { PubSub } = require('@aws-amplify/pubsub');

PubSub.subscribe('myTopic').subscribe({
  next: data => console.log('Message received:', data),
  error: error => console.error(error),
  close: () => console.log('Done'),
});

Using AWS IoT

This feature allows you to use AWS IoT as a provider for PubSub. In this example, the AWS IoT provider is configured and used to subscribe to 'iotTopic'.

const { PubSub } = require('@aws-amplify/pubsub');
const { AWSIoTProvider } = require('@aws-amplify/pubsub/lib/Providers');

PubSub.addPluggable(new AWSIoTProvider({
  aws_pubsub_region: 'us-west-2',
  aws_pubsub_endpoint: 'wss://your-endpoint.iot.us-west-2.amazonaws.com/mqtt',
}));

PubSub.subscribe('iotTopic').subscribe({
  next: data => console.log('Message received:', data),
  error: error => console.error(error),
  close: () => console.log('Done'),
});

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Package last updated on 01 Nov 2018

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