Spring reactive streaming data from regular WebClient request

问题

Im learning new Spring WebFlux and reactive programming.

I would like to create reactive API that streams some data to Angular client. Part of this data I will take from another (third party) API that does not support streams.

So, as I understand I need to:

1. Create REST stream end-point.
2. Link some service to that.
3. This service will call third party API every 5 seconds using WebClient. And put data to my stream. (not sure about this step)
4. That stream is going to be returned by @RestController.

How can I implement this 4 steps?

回答1:

Assuming your remote service responds with a collection of POJOs that Jackson can deserialize as Something.class, you can do something like:

@GetMapping(path = "/streaming", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
@ResponseBody
public Flux<Something> streamSomething() {
  return WebClient.create()
    .get().uri("http://example.org/resource")
    .retrieve().bodyToFlux(Something.class)
    .delaySubscription(Duration.ofSeconds(5))
    .repeat();
}

来源：https://stackoverflow.com/questions/47063531/spring-reactive-streaming-data-from-regular-webclient-request