At its core, a GrAMPS data source is simply an organizational structure to make GraphQL servers easier to build out of modular components.
By following the GrAMPS structure, data sources become more manageable, testable, and shareable. Different teams can own and maintain data sources that are all composed together and exposed through a single GraphQL gateway.
Developers can even get full GraphQL schemas for third-party services simply by installing that service’s data source.
Every GraphQL data source exports a GrAMPS object which defines the following properties:
namespace — a unique name for the data source
context — an object to be used as the context for the resolvers
typeDefs — type definitions for a GraphQL schema
(see the GraphQL docs on schemas for more info)
resolvers — an object containing resolver functions
(see the GraphQL docs on execution for more info)
mocks — mock resolver functions
(see the Apollo docs on mocking for more info)