Test for the graphql schema stitching.

There is an shop system (presented by the api)

The shop has different categories with some products. The data is provided by the product-backend

Each product has got a deliverer with an address. This data is provided by the deliverer-backend

The api merge all data.

1. Install and start the product-backend
2. Install and start the deliverer-backend
3. Install and start the api
4. visit http://localhost:8080/graphiql for testing

Official documentation: https://www.apollographql.com/docs/graphql-tools/schema-stitching.html

See https://dev-blog.apollodata.com/graphql-schema-stitching-8af23354ac37 for an overview and detailed talk

1. testing with Docker
2. research the possibilities of service locators to remove hard coded urls
3. research the possibility of failure handling. How can you downgrade the schema if there is any failure in network or on a backend server