Apollo Express setup for GraphQL with Context.

server.js

import express from 'express'
import { graphqlExpress, graphiqlExpress } from 'apollo-server-express'
import bodyParser from 'body-parser'
import schema from './src/schema'
import movieService from './src/dataSource/movieService'

const GRAPHQL_PORT = 3000

const graphQLServer = express()

// by setting the context here, the Service is now available for Resolvers as context.movieService
graphQLServer.use('/graphql', bodyParser.json(), graphqlExpress({ schema, context: { movieService } }))
graphQLServer.use('/graphiql', graphiqlExpress({ endpointURL: '/graphql' }))

graphQLServer.listen(GRAPHQL_PORT, () =>
    console.log(
        `GraphiQL is now running on http://localhost:${GRAPHQL_PORT}/graphiql`
    )
)