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.

`javascript
import { ApolloClient, InMemoryCache } from '@apollo/client';
import { DDPLink } from '@swydo/apollo-link-ddp';

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

$3


- 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.

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

Setup with Asteroid

`javascript
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.

`javascript
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,
});
``