AsyncAPI native support

[vongosling]

AsyncAPI is an open specification meant to be an industry standard for defining asynchronous APIs. Its design is very close to OpenMessaging but has more complete API lifecycle support. It could help unify documentation automation and code generation and manages, testing, and monitoring asynchronous APIs. The specification provides a language for describing event-driven systems' interfaces regardless of the underlying technology and supports event-driven architecture's complete development cycle. I think we need to work more on programming interfaces in the next step, so we don't have too many migration costs later on.

[qqeasonchen]

Good suggestion, I was keeping paying attention to this technology.

[vongosling]

So far, we've had so many choices that we've made less progress in multi-language supports. Whether to use GRPC to meet this requirement based on the AsyncAPI spec, also we could refer to the structures of CloudEvents and OpenSchema are used.

[qqeasonchen]

That would be a good choice, here is the compare between asyncAPI and cloudevents, https://www.asyncapi.com/blog/async_standards_compare

[vongosling]

All discuss have transfer to issue #417