[英]server sent event spring webFlux with reactor
這是通過瀏覽器客戶端分發常見主題信息的正確方法嗎?
@RestController
public class GenvScriptHandler {
DirectProcessor<String> topicData = DirectProcessor.create();
FluxSink<String> sink;
int test;
@GetMapping(value = "/addTopic")
public void addTopic() {
if (sink == null) {
sink = topicData.sink();
}
sink.next(String.valueOf(test++));
}
@GetMapping(value = "/getTopic", produces = "text/event-stream")
public Flux<String> getTopic() {
Flux<String> autoConnect = topicData.publish().autoConnect();
return autoConnect;
}
}
當我使用DirectProcessor時,不可能有背壓,我想知道通過sse發送時如何消耗通量。 訂戶是否可以請求少於通量的元素?
http://projectreactor.io/docs/core/release/reference/#_directprocessor
因此,如果您通過N個元素推送DirectProcessor,但它的至少一個訂閱者所請求的少於N個元素,則DirectProcessor會向其訂閱者發出IllegalStateException信號。
訂閱SSE請求,執行請求(1)而不是請求(Integer.MAX_VALUE)
因此,如果我下沉* 1000次,即使有訂閱者,也會出現Processor OverLoad和異常:
reactor.core.Exceptions$OverflowException: Can't deliver value due to lack of requests
在我的情況下更安全地使用EmitterProcessor或ReplayProcessor
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