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Merge branch 'BAEL-572' of https://github.com/tomekl007/tutorials into tomekl007-BAEL-572

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Pedja 2017-02-03 17:21:30 +01:00
commit c8734b028b
8 changed files with 238 additions and 0 deletions
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35
rxjava/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>rxjava</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>io.reactivex</groupId>
<artifactId>rxjava</artifactId>
<version>${rx.java.version}</version>
</dependency>
</dependencies>
<properties>
<rx.java.version>1.2.5</rx.java.version>
</properties>
</project>

44
rxjava/src/main/java/com/baelding/rxjava/ColdObservableBackpressure.java Normal file
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package com.baelding.rxjava;
import rx.Observable;
import rx.Subscriber;
import rx.schedulers.Schedulers;
public class ColdObservableBackPressure {
public static void main(String[] args) throws InterruptedException {
Observable.range(1, 1_000_000)
.observeOn(Schedulers.computation())
.subscribe(v -> ComputeFunction.compute(v), Throwable::printStackTrace);
Thread.sleep(10_000);
// Observable.range(1, 1_000_000) //implementation of reactive pull backpressure on cold observable
// .subscribe(new Subscriber<Integer>() {
// @Override
// public void onStart() {
// request(1);
// }
//
// public void onNext(Integer v) {
// compute(v);
//
// request(1);
// }
//
// @Override
// public void onError(Throwable ex) {
// ex.printStackTrace();
// }
//
// @Override
// public void onCompleted() {
// System.out.println("Done!");
// }
// });
}
}

45
rxjava/src/main/java/com/baelding/rxjava/ComputeFunction.java Normal file
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package com.baelding.rxjava;
import rx.Observable;
import java.util.List;
public class ComputeFunction {
public static void compute(Integer v) {
try {
System.out.println("compute integer v: " + v);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void compute(List<Integer> v) {
try {
System.out.println("compute integer v: " + v);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void compute(Observable<Integer> v) {
try {
v.forEach(System.out::println);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public static void compute(Long v) {
try {
System.out.println("compute integer v: " + v);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}

21
rxjava/src/main/java/com/baelding/rxjava/HotObservableBackPressureBatching.java Normal file
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package com.baelding.rxjava;
import rx.schedulers.Schedulers;
import rx.subjects.PublishSubject;
public class HotObservableBackPressureBatching {
public static void main(String[] args) throws InterruptedException {
PublishSubject<Integer> source = PublishSubject.<Integer>create();
source.window(500)
.observeOn(Schedulers.computation())
.subscribe(ComputeFunction::compute, Throwable::printStackTrace);
for (int i = 0; i < 1_000_000; i++) {
source.onNext(i);
}
Thread.sleep(10_000);
}
}

22
rxjava/src/main/java/com/baelding/rxjava/HotObservableBackPressureBuffering.java Normal file
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package com.baelding.rxjava;
import rx.schedulers.Schedulers;
import rx.subjects.PublishSubject;
public class HotObservableBackPressureBuffering {
public static void main(String[] args) throws InterruptedException {
PublishSubject<Integer> source = PublishSubject.<Integer>create();
source
.buffer(1024)
.observeOn(Schedulers.computation())
.subscribe(ComputeFunction::compute, Throwable::printStackTrace);
for (int i = 0; i < 1_000_000; i++) {
source.onNext(i);
}
Thread.sleep(10_000);
}
}

23
rxjava/src/main/java/com/baelding/rxjava/HotObservableBackPressureSkipping.java Normal file
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package com.baelding.rxjava;
import rx.schedulers.Schedulers;
import rx.subjects.PublishSubject;
import java.util.concurrent.TimeUnit;
public class HotObservableBackPressureSkipping {
public static void main(String[] args) throws InterruptedException {
PublishSubject<Integer> source = PublishSubject.<Integer>create();
source.sample(100, TimeUnit.MILLISECONDS)
// .throttleFirst(100, TimeUnit.MILLISECONDS)
.observeOn(Schedulers.computation())
.subscribe(ComputeFunction::compute, Throwable::printStackTrace);
for (int i = 0; i < 1_000_000; i++) {
source.onNext(i);
}
Thread.sleep(10_000);
}
}

28
rxjava/src/main/java/com/baelding/rxjava/HotObservableOnBackPressure.java Normal file
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package com.baelding.rxjava;
import rx.BackpressureOverflow;
import rx.Observable;
import rx.schedulers.Schedulers;
public class HotObservableOnBackPressure {
public static void main(String[] args) throws InterruptedException {
Observable.range(1, 1_000_000)
.onBackpressureBuffer(16, () -> {
},
BackpressureOverflow.ON_OVERFLOW_DROP_OLDEST)
.observeOn(Schedulers.computation())
.subscribe(e -> {
}, Throwable::printStackTrace);
Observable.range(1, 1_000_000)
.onBackpressureDrop()
.observeOn(Schedulers.io())
.doOnNext(ComputeFunction::compute)
.subscribe(v -> {
}, Throwable::printStackTrace);
Thread.sleep(10_000);
}
}

20
rxjava/src/main/java/com/baelding/rxjava/HotObservableWithoutBackPressure.java Normal file
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package com.baelding.rxjava;
import rx.schedulers.Schedulers;
import rx.subjects.PublishSubject;
public class HotObservableWithoutBackPressure {
public static void main(String[] args) throws InterruptedException {
PublishSubject<Integer> source = PublishSubject.<Integer>create();
source.observeOn(Schedulers.computation())
.subscribe(ComputeFunction::compute, Throwable::printStackTrace);
for (int i = 0; i < 1_000_000; i++) {
source.onNext(i);
}
Thread.sleep(10_000);
}
}