This repository is a GraphQL demo of using the DGS framework together with Apollo Federation Server.

Documentation for the DGS framework can be found [here](https://netflix.github.io/dgs).

The repository contains three separate projects:

1. `shows-dgs`: A Kotlin GraphQL service providing the federated `Show` type
2. `reviews-dgs`: A Java GraphQL service that extends the `Show` type with `reviews`
3. `apollo-gateway`: An instance of Apollo Server acting as the Federated Gateway

The `shows-dgs` and `reviews-dgs` projects are Gradle projects.
The `apollo-gateway` is a Node project.
We recommend to import the three individual projects in Intellij.

Running the demo
----

1. Start `show-dgs` by running the Spring Boot app from the IDE or `./gradlew bootRun`
2. Start `reviews-dgs` by running the Spring Boot app from the IDE or `./gradlew bootRun`
3. Run `npm install` in the `apollo-gateway` project
4. Run `node index.js` in the `apollo-gateway` project
5. Open http://localhost:4000 for the query editor

The following is a federated query that should work.

```graphql
{
  shows {
    title
    reviews {
      starRating
    }
  }
}
```

Other DGS framework examples
----

* Standalone DGS in [Java](https://github.com/Netflix/dgs-examples-java)
* Standalone DGS in [Kotlin](https://github.com/Netflix/dgs-examples-kotlin)