Added reactor core
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Andrew Morgan
parent
86029a3487
commit
73026b6565
1
pom.xml
1
pom.xml
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@ -94,6 +94,7 @@
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<module>querydsl</module>
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<!-- <module>raml</module> -->
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<module>reactor-core</module>
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<module>redis</module>
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<module>rest-assured</module>
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<module>rest-testing</module>
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@ -0,0 +1,52 @@
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.baeldung</groupId>
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<artifactId>reactor-core</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<dependency>
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<groupId>io.projectreactor</groupId>
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<artifactId>reactor-core</artifactId>
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<version>3.0.4.RELEASE</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>3.6.1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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<version>1.1.3</version>
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</dependency>
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</dependencies>
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</project>
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@ -0,0 +1,107 @@
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package com.baeldung.reactor;
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import org.junit.Test;
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import org.reactivestreams.Subscriber;
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import org.reactivestreams.Subscription;
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import reactor.core.publisher.ConnectableFlux;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.FluxSink;
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import reactor.core.scheduler.Schedulers;
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import java.time.Duration;
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import java.time.LocalDateTime;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.Stream;
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import static java.time.Duration.ofSeconds;
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import static java.util.stream.Collectors.toList;
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import static org.assertj.core.api.Assertions.assertThat;
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public class ReactorTest {
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@Test
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public void givenFlux_whenSubscribing_shouldStream() throws InterruptedException {
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List<Integer> elements = new ArrayList<>();
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Flux.just(1, 2, 3, 4)
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.log()
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.map(i -> i * 2)
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.subscribe(elements::add);
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assertThat(elements).containsExactly(2, 4, 6, 8);
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}
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@Test
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public void givenFlux_whenZipping_shouldCombine() {
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List<String> elements = new ArrayList<>();
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Flux.just(1, 2, 3, 4)
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.log()
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.map(i -> i * 2)
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.zipWith(Flux.range(0, Integer.MAX_VALUE).log(), (two, one) -> String.format("First Flux: %d, Second Flux: %d", one, two))
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.subscribe(elements::add);
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assertThat(elements).containsExactly(
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"First Flux: 0, Second Flux: 2",
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"First Flux: 1, Second Flux: 4",
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"First Flux: 2, Second Flux: 6",
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"First Flux: 3, Second Flux: 8");
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}
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@Test
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public void givenFlux_whenApplyingBackPressure_shouldPushLessElements() throws InterruptedException {
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List<Integer> elements = new ArrayList<>();
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Flux.just(1, 2, 3, 4)
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.log()
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.map(i -> i * 2)
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.onBackpressureBuffer()
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.subscribe(new Subscriber<Integer>() {
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private Subscription s;
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int onNextAmount;
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@Override
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public void onSubscribe(final Subscription s) {
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this.s = s;
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s.request(2);
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}
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@Override
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public void onNext(final Integer integer) {
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elements.add(integer);
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onNextAmount++;
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if (onNextAmount % 2 == 0) {
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s.request(2);
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}
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}
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@Override
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public void onError(final Throwable t) {
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}
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@Override
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public void onComplete() {
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int ham = 2;
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}
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});
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assertThat(elements).containsExactly(2, 4, 6, 8);
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}
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@Test
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public void givenFlux_whenInParalle_shouldSubscribeInDifferentThreads() {
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List<Integer> elements = new ArrayList<>();
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Flux.just(1, 2, 3, 4)
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.log()
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.map(i -> i * 2)
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.subscribeOn(Schedulers.parallel())
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.subscribe(elements::add);
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assertThat(elements).containsExactly(2, 4, 6, 8);
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}
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}
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