如何使用 Netflix DGS 访问完整的运行时 GraphQLSchema object？

Question

I need to access the complete GraphQLSchema object outside GraphQL request handling. When I used graphql-java directly I was in full control and had the control of this. Right now I need to accomplish the same with Netflix DGS and can't find how to do so (and keep up with runtime changes/reloading later).

For more context - I need to do a few things with this - one is to create a complete, downloadable SDL version of the schema (ie not the same as federation _service { sdl } ) and also gather and expose some directive-driven metadata differently, since I can't introspect it:( from the client...

Answer 1

You can use DgsDataFetchingEnvironment

  @DgsQuery
  public Student getStudent(DgsDataFetchingEnvironment dfe) {
      GraphQLSchema schema = dfe.getGraphQLSchema();
      //if you want to know which fields are selected in query
      DataFetchingFieldSelectionSet fields = dfe.getSelectionSet();
  }