snippets.js

/*
 *
 * serverWillStart
 * 
 * requestDidStart
 *  parsingDidStart
 *  validationDidStart
 *  didResolveOperation
 *  executionDidStart
 *  didEncounterErrors
 *  willSendResponse
 *
 */

/*
 *
 * safelisting
 *
 * serverWillStart
 *  fetch operations, signal ready
 *
 * requestDidStart
 *  didResolveOperation
 *
 */
import { useServer, useGraphManager } from '@apollo/server';
import { Agent } from './';

const useOperations = () => {
  const store = new InMemoryLRUCache();
  const gmConfig = useGraphManager();
  const agent = new Agent(gmConfig)

  useServer(async () => {
    await agent.start();   

    return () => {
      agent.stop();
    }
  })

  return agent.operations;
}

// ./safelist
import { useSchema, useReportingAgent, useRequest, useOperations } from '@apollo/server';

const Safelist = () => {
  const operations = useOperations();
  const schema = useSchema();
  const agent = useReportingAgent();

  // validate operations against schema
  validate(schema, operations);

  // enforce the safe list on requests
  useRequest((request) => {
    if (list.has(request.query)) return;

    agent.report(request.query, { safeListHit: false });

    throw new Error("query not in safelist");
  });

  return 
}

import express from 'express';
import { http, Apollo, GraphManager, Federation } from '@apollo/server'

import { Safelist } form './safelist';

const app = express();

const Graph = () => {
  GraphManager({ apiKey: "service:airbnb:12345" });
  Safelist();
  Federation();
}

const { start, stop, errors, execute } = Apollo(Graph);

app.use('/graphql', http(execute))

await start();

app.listen();