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74 lines (55 loc) · 1.93 KB
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package flux;
import org.junit.Test;
import org.reactivestreams.Subscription;
import reactor.core.publisher.BaseSubscriber;
import reactor.core.publisher.Flux;
import reactor.test.StepVerifier;
public class FluxBackPressureTest {
@Test
public void backPressureTest() {
Flux<Integer> finiteFlux = Flux.range(1, 10)
.log();
StepVerifier.create(finiteFlux)
.expectSubscription()
.thenRequest(1)
.expectNext(1)
.thenRequest(1)
.expectNext(2)
.thenCancel()
.verify();
}
@Test
public void backPressure() {
Flux<Integer> finiteFlux = Flux.range(1, 10)
.log();
finiteFlux.subscribe((element) -> System.out.println("Element is : " + element)
, (e) -> System.err.println("Exception is : " + e)
, () -> System.out.println("Done") // it will not print
, (subscription -> subscription.request(2)));
// print Element is : 1 Element is : 2
}
@Test
public void backPressure_cancel() {
Flux<Integer> finiteFlux = Flux.range(1, 10)
.log();
finiteFlux.subscribe((element) -> System.out.println("Element is : " + element)
, (e) -> System.err.println("Exception is : " + e)
, () -> System.out.println("Done")
, (subscription -> subscription.cancel()));
}
@Test
public void customized_backPressure() {
Flux<Integer> finiteFlux = Flux.range(1, 10)
.log();
finiteFlux.subscribe(new BaseSubscriber<Integer>() {
@Override
protected void hookOnNext(Integer value) {
request(1);
System.out.println("Value received is : " + value);
if(value == 4){
cancel();
}
}
});
}
}