GraphQL Case Study Steps

The case study is a GraphQL API that retrieves a list of locations from a database. The code can be cloned from GitLab.

The REST API has the following components:

• Controller - LocationController.java
• Service - LocationService.java and LocationServiceImpl.java
• CRUD Repository - LocationRepository.java
• Domain Entity/Model - Location.java
• Schema - location.graphqls and via the GraphiQL console at http://localhost:8080/graphql/schema.json.
• Mutator - Mutation.java
• Query - Query.java
• H2 Database accessible via http://localhost:8080/h2/
• Tomcat Server accessible via http://localhost:8080
• GraphiQL console accessible via http://localhost:8080/graphiql

Sample Queries/Mutations

{
  findAllApplications {
    id
    owner
    address
  }
}

mutation {
  newLocation(
    name: "MBJ Airport",
    address: "Montego Bay, Jamaica airport location") {
      id 
      name
      address
    }
}

mutation {
  deleteLocation(id:1)
}