Implementation

Public API components

SchemaModule

The main component of Rejoiner is the SchemaModule.

TODO: Explain how SchemaModule works and how it uses Guice Multibinder.

Java Annotations

These annotations are used to build and modify a generated GraphQL schema.

• Query
• Mutation
• SchemaModification
• Args

DSL

• Type - used to build schema modifications.

Producing the final GraphQL schema

Each SchemaModule generates parts of the schema and the SchemaProviderModule combines all of those parts into the final schema.

• Schema
• SchemaProviderModule

Functional utilities

• SchemaToProto - used to generate a protobuf message from the resulting schema. This can be used to expose the GraphQL endpoint over gRPC.
• SchemaToTypeScript - generates a basic TypeScript typedef file. Complex clients should consider GraphQL frameworks such as Relay or Apollo.
• QueryResponseToProto

Extending Rejoiner

• TypeModification are functions that transform GraphQLObjectType instances. This is used to add and remove fields from the generated GraphQLObjectType instances. Additional transforms can be added by implementing this interface.
• Annotations

Implementation

These classes are package private and not part of the public API.

• GqlInputConverter
• ProtoRegistry
• ProtoToGql