Topics

Create a topic in PUBSUB_ROOT_DIR/topics which extends Topic and a payload which extends Payload from package.

/pubsub/topics/simple.topic.name.ts

import { Topic, Payload as BasePayload } from '@honestfoodcompany/pubsub';

export default class SimpleTopic extends Topic {

readonly name = 'simple.topic.name';

}

export interface Payload extends BasePayload {

id: number;

data: string;

}

tip

As a convention, the name of the topic file should match the name of the topic name so the file directory becomes self-documenting.

Publishing a message

If a topic does not exist, it will be created before a message is published.

Typescript example

client.example.ts

import SimpleTopic, { Payload } from 'PUBSUB_ROOT_DIR/topics/simple.topic.name';

new SimpleTopic().publish<Payload>({ id: 1, data: 'My first message' });

Javascript example

client.example.js

const SimpleTopic = require('PUBSUB_ROOT_DIR/topics/simple.topic.name');

new SimpleTopic().publish({ id: 1, data: 'My first message' });