[AS-252] gateway: normalize root operation types in reporting

packages/apollo-federation/CHANGELOG.md

@@ -4,7 +4,7 @@
 
 > The changes noted within this `vNEXT` section have not been released yet.  New PRs and commits which introduce changes should include an entry in this `vNEXT` section as part of their development.  When a release is being prepared, a new header will be (manually) created below and the appropriate changes within that release will be moved into the new section.
 
-- _Nothing yet! Stay tuned._
+- Export `defaultRootOperationNameLookup` and `normalizeTypeDefs`; needed by `@apollo/gateway` to normalize root operation types when reporting to Apollo Graph Manager. [#4071](https://github.com/apollographql/apollo-server/pull/4071)
 
 ## 0.15.0
 

packages/apollo-federation/src/composition/index.ts

@@ -2,3 +2,4 @@ export * from './compose';
 export * from './composeAndValidate';
 export * from './types';
 export { compositionRules } from './rules';
+export { defaultRootOperationNameLookup, normalizeTypeDefs } from './normalize';

packages/apollo-federation/src/composition/normalize.ts

@@ -15,18 +15,18 @@ export function normalizeTypeDefs(typeDefs: DocumentNode) {
   );
 }
 
+// Map of OperationTypeNode to its respective default root operation type name
+export const defaultRootOperationNameLookup: {
+  [node in OperationTypeNode]: DefaultRootOperationTypeName;
+} = {
+  query: 'Query',
+  mutation: 'Mutation',
+  subscription: 'Subscription',
+};
+
 export function defaultRootOperationTypes(
   typeDefs: DocumentNode,
 ): DocumentNode {
-  // Map of OperationTypeNode to its respective default root operation type name
-  const defaultRootOperationNameLookup: {
-    [node in OperationTypeNode]: DefaultRootOperationTypeName;
-  } = {
-    query: 'Query',
-    mutation: 'Mutation',
-    subscription: 'Subscription',
-  };
-
   // Array of default root operation names
   const defaultRootOperationNames = Object.values(
     defaultRootOperationNameLookup,

packages/apollo-gateway/CHANGELOG.md

@@ -5,6 +5,7 @@
 > The changes noted within this `vNEXT` section have not been released yet.  New PRs and commits which introduce changes should include an entry in this `vNEXT` section as part of their development.  When a release is being prepared, a new header will be (manually) created below and the appropriate changes within that release will be moved into the new section.
 
 - __FIX__: Correctly handle unions with nested conditions that have no `possibleTypes` [#4071](https://github.com/apollographql/apollo-server/pull/4071)
+- __FIX__: Normalize root operation types when reporting to Apollo Graph Manager. Federation always uses the default names `Query`, `Mutation`, and `Subscription` for root operation types even if downstream services choose different names; now we properly normalize traces received from downstream services in the same way. [#4100](https://github.com/apollographql/apollo-server/pull/4100)
 
 ## 0.15.0
 

packages/apollo-gateway/src/__tests__/__fixtures__/schemas/accounts.ts

@@ -6,7 +6,12 @@ export const typeDefs = gql`
   directive @stream on FIELD
   directive @transform(from: String!) on FIELD
 
-  extend type Query {
+  schema {
+    query: RootQuery
+    mutation: Mutation
+  }
+
+  extend type RootQuery {
     user(id: ID!): User
     me: User
   }
@@ -36,7 +41,7 @@ export const typeDefs = gql`
     metadata: [UserMetadata]
   }
 
-  extend type Mutation {
+  type Mutation {
     login(username: String!, password: String!): User
   }
 
@@ -80,7 +85,7 @@ const libraryUsers: { [name: string]: string[] } = {
 };
 
 export const resolvers: GraphQLResolverMap<any> = {
-  Query: {
+  RootQuery: {
     user(_, args) {
       return { id: args.id };
     },

packages/apollo-gateway/src/__tests__/buildQueryPlan.test.ts

@@ -5,7 +5,7 @@ import {
   GraphQLSchemaValidationError,
 } from 'apollo-graphql';
 import gql from 'graphql-tag';
-import { composeServices, buildFederatedSchema } from '@apollo/federation';
+import { composeServices, buildFederatedSchema, normalizeTypeDefs } from '@apollo/federation';
 
 import { buildQueryPlan, buildOperationContext } from '../buildQueryPlan';
 
@@ -45,7 +45,7 @@ describe('buildQueryPlan', () => {
     ({ schema, errors } = composeServices(
       Object.entries(serviceMap).map(([serviceName, service]) => ({
         name: serviceName,
-        typeDefs: service.sdl(),
+        typeDefs: normalizeTypeDefs(service.sdl()),
       })),
     ));
 

packages/apollo-gateway/src/__tests__/executeQueryPlan.test.ts

@@ -9,7 +9,7 @@ import {
 import gql from 'graphql-tag';
 import { GraphQLRequestContext } from 'apollo-server-types';
 import { AuthenticationError } from 'apollo-server-core';
-import { composeServices, buildFederatedSchema } from '@apollo/federation';
+import { composeServices, buildFederatedSchema, normalizeTypeDefs } from '@apollo/federation';
 
 import { buildQueryPlan, buildOperationContext } from '../buildQueryPlan';
 import { executeQueryPlan } from '../executeQueryPlan';
@@ -60,7 +60,7 @@ describe('executeQueryPlan', () => {
     ({ schema, errors } = composeServices(
       Object.entries(serviceMap).map(([serviceName, service]) => ({
         name: serviceName,
-        typeDefs: service.sdl(),
+        typeDefs: normalizeTypeDefs(service.sdl()),
       })),
     ));
 
@@ -104,7 +104,7 @@ describe('executeQueryPlan', () => {
 
     it(`should include an error when a root-level field errors out`, async () => {
       overrideResolversInService('accounts', {
-        Query: {
+        RootQuery: {
           me() {
             throw new AuthenticationError('Something went wrong');
           },
@@ -151,7 +151,7 @@ describe('executeQueryPlan', () => {
 
     it(`should still include other root-level results if one root-level field errors out`, async () => {
       overrideResolversInService('accounts', {
-        Query: {
+        RootQuery: {
           me() {
             throw new Error('Something went wrong');
           },

packages/apollo-gateway/src/executeQueryPlan.ts

@@ -12,6 +12,7 @@ import {
   GraphQLFieldResolver,
 } from 'graphql';
 import { Trace, google } from 'apollo-engine-reporting-protobuf';
+import { defaultRootOperationNameLookup } from '@apollo/federation';
 import { GraphQLDataSource } from './datasources/types';
 import {
   FetchNode,
@@ -361,6 +362,19 @@ async function executeFetch<TContext>(
             traceParsingFailed = true;
           }
         }
+        if (traceNode.trace) {
+          // Federation requires the root operations in the composed schema
+          // to have the default names (Query, Mutation, Subscription) even
+          // if the implementing services choose different names, so we override
+          // whatever the implementing service reported here.
+          const rootTypeName =
+            defaultRootOperationNameLookup[
+              context.operationContext.operation.operation
+            ];
+          traceNode.trace.root?.child?.forEach((child) => {
+            child.parentType = rootTypeName;
+          });
+        }
         traceNode.traceParsingFailed = traceParsingFailed;
       }
     }