thatisuday / graphql-distribution-types

Learning different ways of hosting distributed GraphQL services.

GraphQL distribution

Learning different ways of hosting distributed GraphQL services.

Prerequisite

$ npm install

Schema Merge

When GraphQL services are modules/libraries (done for separation of concerns) but they are not hosted independently. So their schema will be merged and exposed from a single service.

$ npm run start:schema-merge

Schema Stitching

When GraphQL services are hosted independently but do not share much common between each other such as shared types. In this case, a proxy or gateway service will stich the schema together at runtime and expose both services from a single endpoint.

$ npm run start:schema-stitching::book-service
$ npm run start:schema-stitching::author-service
$ npm run start:schema-stitching::gateway-service

GraphQL federation

It's similar to Schema Stitching but these services can share types between each other without hardcoding the logic of merging data for these types at gateway level.

Prerequisite

• Install Rover CLI
• $ cd federation
• Perform Schema Composition

$ npm run start:federation::book-service
$ npm run start:federation::author-service
$ npm run start:federation::router