APOLLO SUBSCRIPTIONS

This is an exercise for implementing GraphQL subscriptions manually with Apollo Server 2, Postgres and NodeJS. It is a basic message stream with channels.

Note: this is not production grade, it is intended to be a simple exercise

Features

• Apollo Server 2.
• Subscriptions.
• Docker.
• Postgres.

Requirements

• Docker compose.

Instructions

• Clone the repository.
• Mount the containers cd server && docker-composer up -d
• Navigate to the GraphQL Playground http://localhost:4000
• The following GraphQL operations are available:

# Gets all the messages for a channel
query Board {
  board(channel: "natgeo") {
    id
    text
  }
}

# Subscribes to a channel
subscription Stream {
  stream(channel: "natgeo") {
    text
  }
}

# Posts a message to a channel
mutation Post {
  post(channel: "natgeo", text: "hola!") {
    text
  }
}

• When you are finished, unmount the containers docker-compose down

TODOs

• Basic subscriptions server.
• Postgres docker container.
• Database initialization.
• Implement API.
• Update GraphQL Schema.
• Dockerize App.
• Implement graphql-postgres-subscriptions.