optimizes the way GraphQL is bootstrapped

src/graphql/index.js

@@ -14,11 +14,9 @@ const errorHandler = require('./errorHandler');
 const { access } = require('../auth/graphql/resolvers');
 
 class GraphQL {
-  constructor(init, req, res) {
+  constructor(init) {
     Object.assign(this, init);
     this.init = this.init.bind(this);
-    this.req = req;
-    this.res = res;
 
     this.types = {
       blockTypes: {},
@@ -46,9 +44,7 @@ class GraphQL {
     this.buildPoliciesType = buildPoliciesType.bind(this);
     this.initCollections = initCollections.bind(this);
     this.initGlobals = initGlobals.bind(this);
-  }
 
-  init() {
     this.initCollections();
     this.initGlobals();
 
@@ -69,34 +65,37 @@ class GraphQL {
 
     const query = new GraphQLObjectType(this.Query);
     const mutation = new GraphQLObjectType(this.Mutation);
-    const schema = new GraphQLSchema({
+
+    this.schema = new GraphQLSchema({
       query,
       mutation,
     });
 
-    let errorExtensions = [];
-    let errorExtensionIteration = 0;
+    this.errorExtensions = [];
+    this.errorExtensionIteration = 0;
 
-    const extensions = async (info) => {
+    this.extensions = async (info) => {
       const { result } = info;
       if (result.errors) {
         const afterErrorHook = typeof this.config.hooks.afterError === 'function' ? this.config.hooks.afterError : null;
-        errorExtensions = await errorHandler(info, this.config.debug, afterErrorHook);
+        this.errorExtensions = await errorHandler(info, this.config.debug, afterErrorHook);
       }
       return null;
     };
+  }
 
+  init(req, res) {
     return graphQLHTTP({
-      schema,
+      schema: this.schema,
       customFormatErrorFn: () => {
         const response = {
-          ...errorExtensions[errorExtensionIteration],
+          ...this.errorExtensions[this.errorExtensionIteration],
         };
-        errorExtensionIteration += 1;
+        this.errorExtensionIteration += 1;
         return response;
       },
-      extensions,
-      context: { req: this.req, res: this.res },
+      extensions: this.extensions,
+      context: { req, res },
     });
   }
 }

src/index.js

@@ -55,10 +55,12 @@ class Payload {
 
     this.router.get('/access', access(this.config));
 
+    const graphQLHandler = new GraphQL(this);
+
     this.router.use(
       this.config.routes.graphQL,
       identifyAPI('GraphQL'),
-      (req, res) => new GraphQL(this, req, res).init()(req, res),
+      (req, res) => graphQLHandler.init(req, res)(req, res),
     );
 
     this.router.get(this.config.routes.graphQLPlayground, graphQLPlayground({