asyncapi: 3.0.0
info:
  title: Mercure Hub Example
  version: 1.0.0
  description: This example demonstrates how to define a Mercure hub.
defaultContentType: application/ld+json
servers:
  production:
    host: demo.mercure.rocks
    pathname: /.well-known/mercure
    protocol: mercure
channels:
  books:
    address: 'https://example.com/books/{id}'
    messages:
      book:
        $ref: '#/components/messages/book'
    description: >-
      Every time a resource of type `http://schema.org/Book` is created or
      modified, a JSON-LD representation of the new version of this resource
      must be pushed in this Mercure topic.
    parameters:
      id:
        description: ID of the book
operations:
  ReceiveBooksInfo:
    action: receive
    channel:
      $ref: '#/channels/books'
    messages:
      - $ref: '#/channels/books/messages/book'
  SendBooksInfo:
    action: send
    channel:
      $ref: '#/channels/books'
    messages:
      - $ref: '#/channels/books/messages/book'
components:
  messages:
    book:
      summary: The content of a book resource.
      externalDocs:
        url: 'https://schema.org/Book'
      payload:
        type: object
        properties:
          '@id':
            type: string
            format: iri-reference
          '@type':
            type: string
            format: iri-reference
          name:
            type: string
          isbn:
            type: string
          abstract:
            type: string