Apollo Link using DDP

This is the client part of the DDP setup for Apollo. It works out of the box in a Meteor environment but is also usable with packages like asteroid.

Installation

meteor npm install --save apollo-link-ddp apollo-link graphql

Setup

This packages gives you a DDPLink for your Apollo Client. Creating an Apollo Client is the same as with any other Apollo Link.

import ApolloClient from 'apollo-client';
import { DDPLink } from 'apollo-link-ddp';
import { InMemoryCache } from 'apollo-cache-inmemory';

export const client = new ApolloClient ({
  link: new DDPLink(),
  cache: new InMemoryCache()
});

Options

• connection: The DDP connection to use. Default Meteor.connection.
• method: The name of the method. Default __graphql.
• publication: The name of the publication. Default __graphql-subscriptions.
• ddpRetry: Retry failed DDP method calls. Default true. Switch off and use apollo-link-retry for more control.
• socket: Optionally pass a socket to listen to for messages. This makes it easy to integrate with non-Meteor DDP clients.

// Pass options to the DDPLink constructor
new DDPLink({
  connection: Meteor.connection
});

Setup with Asteroid

const Asteroid = createClass();
const asteroid = new Asteroid({
    endpoint: 'ws://localhost:3000/websocket',
});

const link = new DDPLink({
    connection: asteroid,
    socket: asteroid.ddp.socket,
    subscriptionIdKey: 'id',
});

Setup with SimpleDDP

DDP-Apollo works with SimpleDDP version 2 and up.

const SimpleDDP = require('simpleddp');

const connection = new SimpleDDP({
    endpoint: 'ws://localhost:3000/websocket',
    SocketConstructor: global.WebSocket,
});

this.link = new DDPLink({
    connection: connection,
    socket: connection.ddpConnection.socket,
});