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It is a basic project to demonstrate how a message can be published from Apollo Server, using GraphQL PubSub, to a RabbitMQ message broker

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Apollo Server & RabbitMQ

It is a basic project to demonstrate how a message can be published from Apollo Server, using GraphQL PubSub, to a RabbitMQ message broker

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

Prerequisites

  • A running RabbitMQ server.
  • A running MongoDB
  • NodeJS v14+
  • npm v7+ or yarn v1+

Installing

Clone the repo. Go under the project directory.

Create an .env file and assign AMQP and MongoDB connection informations to relevant variables, like that:

AMQP_SERVER="amqp_server_info"
MONGODB_URL="mongodb_info"

Then run:

npm i

or

yarn install

Usage

Run npm start or yarn start to execute the server. Then open up the Apollo Server in a web browser and run this subscription:

subscription HeroCreated {
  heroEvent {
    _id
    name
    enemies
    powers
  }
}

And then create a hero in an another tab on the Apollo Server:

mutation AddHero {
  addHero(
    body: { name: "Batman", powers: "Night See", enemies: ["Penguin", "Bane"] }
  ) {
    _id
    name
    powers
    enemies
  }
}

After run the mutation above, open up subscription tab and you should see the newly added hero.

Also you can delete the hero by running this mutation:

mutation DeleteHero {
  deleteHero(id: "id_of_the_hero") {
    _id
    name
    powers
  }
}

And you can check exchanges and queues in the AMQP Server. You should see an exchange named apollo-pubsub of the topic type.

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It is a basic project to demonstrate how a message can be published from Apollo Server, using GraphQL PubSub, to a RabbitMQ message broker

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