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GraphQL and Spring Webflux

This is a sample GraphQL application written in kotlin that uses graphQL-java and spring webflux (with spring-boot 2).

When browsing the application on localhost:8080, you will see the graphiQL explorer.

Why

There is a graphql-spring-boot-starter already available but it uses a Servlet which forces us to use spring MVC.

Creating a handler for webflux using graphql-java is fairly trivial but there is actually a spec to follow when serving graphql over HTTP.

This is my implementation of the spec, it is fully tested and ready to be used in your application.

I hope it can serve as a base implementation if graphql-java's authors wish to support Webflux in the future.

Tests

Tests are written using the reactive WebClient and junit 5.

They require gradle 4.6 to work, so be sure to use the wrapper.

Your feedback is welcome

I'm not a reactor specialist and I don't have a clear understanding of graphql-java async's internals yet. In particular, I'm curious about this issue.

If you have more insights, please give your opinion.

I did my best to implement the graphql spec but there might be bugs or things I overlooked.

If you find anything odd, contributing with an issue or a failing test would be wonderful. ❤️

Thanks!