Spring boot webflux TEXT_EVENT_STREAM_VALUE is not working - spring-boot

Question

I'm using spring-boot with the dependency spring-boot-starter-webflux,
i want to get one data per second with browser,
when i use spring-boot version 2.1.4,the code is working,
but 2.1.5 or greater version not working,
i will get all of the data at 10 sesonds later,not one data per second
I want to get the reason,or others i should do
I find spring-boot update the dependency of netty in 2.1.5,
so if i add the dependency in my pom.xml with
<dependency>
<groupId>io.projectreactor.netty</groupId>
<artifactId>reactor-netty</artifactId>
<version>0.8.8.RELEASE</version>
</dependency>
it working
#RestController
#RequestMapping("/demo")
public class DemoController {
// just get a string per second
#GetMapping(value = "",produces = MediaType.TEXT_EVENT_STREAM_VALUE)
public Flux<String> getMsg(){
return Flux.fromStream(new Random().ints(10).mapToObj(intStream ->
{
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "this is data "+intStream;
}));
}
}

Answer 1

I believe this will achieve what it is you are going for.
#GetMapping(value = "",produces = MediaType.TEXT_EVENT_STREAM_VALUE)
public Flux<String> getMsg(){
return Flux.fromStream(new Random()
.ints(10)
.mapToObj(value -> "this is data " + value))
.delayElements(Duration.ofSeconds(1));
}