Node.js - topic.publish()

Publish an event (push based message) to a topic.

import { topic } from '@nitric/sdk'

const updates = topic('updates').for('publishing')

await updates.publish({
  payload: {
    something: 'amazing happened',
  },
})

Parameters

Name
event
Required
Required
Type
NitricEvent
Description
The event to publish to the topic.
Name
id
Optional
Optional
Type
string
Description
Unique ID to apply to the event.
Name
payload
Required
Required
Type
Record<string, any>
Description
Payload to send with the event.
Name
payloadType
Optional
Optional
Type
string
Description
A hint to the type of payload supplied.
Name
opts
Optional
Optional
Type
object
Description
Additional options when publishing a message to the topic.
Name
delay
Optional
Optional
Type
number
Description
A number of seconds to delay the delivery of this message.

Examples

Publish a message

Publishing messages to a topic will push a copy of the message to each of the topic's subscribers. By default, delivery occurs without a delay.

import { topic } from '@nitric/sdk'

const updates = topic('updates').for('publishing')

await updates.publish({
  payload: {
    something: 'amazing happened',
  },
})

Delaying message delivery

You can delay the delivery of messages sent to a topic. The current maximum delay is 7 days (604800 seconds).

import { topic } from '@nitric/sdk'

const updates = topic('updates').for('publishing')

const event = { payload: { example: 'delayed' } }

// 10 minute delay
await updates.publish(event, { delay: 600 })

Notes

If an id is not supplied with an event a UUID(v4) will be generated for you.
A function may subscribe to OR publish to a topic but not both.