Merging Multiple GraphQL Schemas

As your application grows, you might find yourself with multiple independent GraphQL services. How do you present them as a single, cohesive API to your clients?

This lesson will guide you through implementing schema stitching in a Spring Boot application. You'll learn to combine multiple backend GraphQL schemas into one unified endpoint.

A GraphQL Gateway acts as a central entry point for all your client applications. Instead of clients querying multiple services directly, they query the gateway.

• The gateway knows about all backend GraphQL services.
• It fetches their individual schemas.
• It combines these schemas into a single, unified schema.
• It then routes incoming client queries to the correct backend service and aggregates the results.