README.md

Federation JVM Spring Example

Apollo Federation JVM example implementation using Spring for GraphQL. If you want to discuss the project or just say hi, stop by the Apollo community forums.

The repository contains two separate projects:

1. products-subgraph: A Java GraphQL service providing the federated Product type
2. reviews-subgraph: A Java GraphQL service that extends the Product type with reviews

See individual projects READMEs for detailed instructions on how to run them.

Running the demo

1. Start products-subgraph by running the ProductsApplication Spring Boot app from the IDE or by running ./gradlew :products-subgraph:bootRun from the root project directory

2. Start reviews-subgraph by running the ReviewsApplication Spring Boot app from the IDE or ./gradlew :reviews-subgraph:bootRun from the root project directory

3. Start Federated Router

   1. Install rover CLI
   2. Start router and compose products schema using rover dev command

   # start up router and compose products schema
   rover dev --name products --schema ./products-subgraph/src/main/resources/graphql/schema.graphqls --url http://localhost:8080/graphql

   3. In another shell run rover dev to compose reviews schema

   rover dev --name reviews --schema ./reviews-subgraph/src/main/resources/graphql/schema.graphqls --url http://localhost:8081/graphql

4. Open http://localhost:3000 for the query editor

Example federated query

query ExampleQuery {
    products {
        id
        name
        description
        reviews {
            id
            text
            starRating
        }
    }
}

Other Federation JVM examples

• Netflix DGS Federation Example
• GraphQL Java Kickstart Federation Example