Flow support

[Globegitter]

It would be nice to have have support for Kotlin's Flow wherever fitting, e.g. for streaming results from postgres. It has been promoted to sable recently: https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.3.0 and we are already making use of it in our applications, so it would be great if we could integrate vertx easily into that.

[asad-awadia]

@Globegitter what would it look like? Like flow emit the eventbus messages?

[ylemoigne]

On my side, I would like bridge/operator to convert a ReadStream<Buffer> to a Flow<Buffer> and conversion from Flow<Buffer> to WriteStream<Buffer>.

[tsegismont]

@Globegitter you can convert a ReadStream to a channel and then use consumeAsFlow