Expose remote resolvers type defs

CHANGELOG.md

@@ -1,10 +1,13 @@
 # Change log
 
+* Exposes Remote resolvers. Help to create federated schemas from remote resolvers.
+
 ### 4.0.6
 
 * Use `getIntrospectionQuery` instead of deprecated `introspectionQuery` constant from graphql-js
   [@derek-miller](https://github.com/derek-miller) in [#1228](https://github.com/apollographql/graphql-tools/pull/1228)
 
+
 ### 4.0.5
 
 * Fixes a bug where schemas with scalars could not be merged when passed to

src/stitching/index.ts

@@ -1,4 +1,7 @@
-import makeRemoteExecutableSchema, { createResolver as defaultCreateRemoteResolver } from './makeRemoteExecutableSchema';
+import makeRemoteExecutableSchema, {
+  createResolver as defaultCreateRemoteResolver,
+  getRemoteTypeDefsAndResolvers
+} from './makeRemoteExecutableSchema';
 import introspectSchema from './introspectSchema';
 import mergeSchemas from './mergeSchemas';
 import delegateToSchema from './delegateToSchema';
@@ -12,5 +15,6 @@ export {
   // but exposed for the community use
   delegateToSchema,
   defaultMergedResolver,
-  defaultCreateRemoteResolver
+  defaultCreateRemoteResolver,
+  getRemoteTypeDefsAndResolvers
 };

src/stitching/makeRemoteExecutableSchema.ts

@@ -48,6 +48,10 @@ export type FetcherOperation = {
   variables?: { [key: string]: any };
   context?: { [key: string]: any };
 };
+type schemaParamsProps = {
+  typeDefs: DocumentNode | string;
+  resolvers: IResolvers<any, any>;
+};
 
 export default function makeRemoteExecutableSchema({
   schema,
@@ -57,13 +61,42 @@ export default function makeRemoteExecutableSchema({
   buildSchemaOptions,
   printSchemaOptions = { commentDescriptions: true }
 }: {
-  schema: GraphQLSchema | string;
-  link?: ApolloLink;
-  fetcher?: Fetcher;
-  createResolver?: (fetcher: Fetcher) => GraphQLFieldResolver<any, any>;
   buildSchemaOptions?: BuildSchemaOptions;
+  createResolver?: (fetcher: Fetcher) => GraphQLFieldResolver<any, any>;
+  fetcher?: Fetcher;
+  link?: ApolloLink;
   printSchemaOptions?: PrintSchemaOptions;
+  schema: GraphQLSchema | string;
 }): GraphQLSchema {
+  const { typeDefs, resolvers } = getRemoteTypeDefsAndResolvers({
+    buildSchemaOptions,
+    createResolver,
+    fetcher,
+    link,
+    printSchemaOptions,
+    schema
+  });
+  return makeExecutableSchema({
+    typeDefs,
+    resolvers
+  });
+}
+
+export function getRemoteTypeDefsAndResolvers({
+  buildSchemaOptions,
+  createResolver: customCreateResolver = createResolver,
+  fetcher,
+  link,
+  printSchemaOptions = { commentDescriptions: true },
+  schema
+}: {
+  buildSchemaOptions?: BuildSchemaOptions;
+  createResolver?: (fetcher: Fetcher) => GraphQLFieldResolver<any, any>;
+  fetcher?: Fetcher;
+  link?: ApolloLink;
+  printSchemaOptions?: PrintSchemaOptions;
+  schema: GraphQLSchema | string;
+}): schemaParamsProps {
   if (!fetcher && link) {
     fetcher = linkToFetcher(link);
   }
@@ -155,10 +188,10 @@ export default function makeRemoteExecutableSchema({
     }
   }
 
-  return makeExecutableSchema({
+  return {
     typeDefs,
     resolvers
-  });
+  };
 }
 
 export function createResolver(fetcher: Fetcher): GraphQLFieldResolver<any, any> {