graphql-microservices-example

main-service.tsx

import { introspectSchema, makeRemoteExecutableSchema, mergeSchemas } from 'graphql-tools';
import { createHttpLink } from 'apollo-link-http';
import fetch from 'node-fetch';

const createSchema = async () => {
  const movieServiceLink = createHttpLink({
    uri: `https://w5vwzkn9zz.lp.gql.zone/graphql`,
    fetch
  });

  const cosmicJsServiceLink = createHttpLink({
    uri: `https://graphql.cosmicjs.com/v1`,
    fetch
  });

  const createCosmicJsServiceSchema = async () => {  
    const schema = await introspectSchema(cosmicJsServiceLink);

    return makeRemoteExecutableSchema({
      schema,
      link: cosmicJsServiceLink
    });
  }

  const createMovieServiceSchema = async () => {  
    const schema = await introspectSchema(movieServiceLink);

    return makeRemoteExecutableSchema({
      schema,
      link: movieServiceLink
    });
  }

  const movieServiceSchema = await createMovieServiceSchema();
  const cosmicJsServiceSchema = await createCosmicJsServiceSchema();

  return mergeSchemas({
    schemas: [movieServiceSchema, cosmicJsServiceSchema]
  });
}

export const schema = createSchema();