Switch to spring-graphql

[sbegaudeau]

For this issue, there are multiple tasks that need to be performed:

• Delete sirius-components-graphql
• Delete sirius-components-annotations-spring
• Delete IDataFetcherWithFieldCoordinates

After that, add a dependency to

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-graphql</artifactId>
        </dependency>

in the various graphql projects such as:

• sirius-components-diagrams-graphql
• sirius-components-forms-graphql
• sirius-components-selection-graphql
• sirius-web-graphql

And change all the data fetchers from this:

@MutationDataFetcher(type = "Mutation", field = MutationCreateProjectDataFetcher.CREATE_PROJECT_FIELD)
public class MutationCreateProjectDataFetcher implements IDataFetcherWithFieldCoordinates<IPayload> {
    @Override
    public IPayload get(DataFetchingEnvironment environment) throws Exception {
        // ...
    }
}

to this:

@Controller
public class MutationCreateProjectDataFetcher {
    @MutationMapping
    public IPayload createProject(@Argument CreateProjectInput input) {
        // ...
    }
}

Once this is done, you will also need to remove the dependency to subscription-transport-ws to use graphql-ws instead on the frontend.

When everything is over and the code compiles, use the following configuration properties in the application{-dev}.properties of Sirius Web:

• spring.graphql.path for the path of the GraphQL API (something like /api/graphql should do the trick for Sirius Web)
• spring.graphql.websocket.path for the path of the subscriptions (I think that we are using /api/subscription currently in Sirius Web)

After that a release will be needed to let consumers of Sirius Components adapt to this sizable API change.

[sbegaudeau]

Have a look at the official Apollo documentation regarding the migration from subscription-transport-ws to graphql-ws here and the spring-graphql documentation there.

[sbegaudeau]

We will also be able to delete sirius-components-graphiql since GraphiQL is provided by spring-graphql with an up to date version.