BEAL-572 rx project structure, hot cold observables

rxjava/pom.xml

@@ -0,0 +1,35 @@
+<?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>

rxjava/src/main/java/com/baelding/rxjava/HotObservableBackpressure.java

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+package com.baelding.rxjava;
+
+
+import rx.schedulers.Schedulers;
+import rx.subjects.PublishSubject;
+
+public class HotObservableBackPressure {
+    public static void main(String[] args) throws InterruptedException {
+        PublishSubject<Integer> source = PublishSubject.create();
+
+        source
+                .observeOn(Schedulers.computation())
+                .subscribe(v -> compute(v), Throwable::printStackTrace);
+
+        for (int i = 0; i < 1_000_000; i++) {
+            source.onNext(i);
+        }
+
+        Thread.sleep(10_000);
+    }
+
+    private static void compute(Integer v) {
+        try {
+            System.out.println("compute integer v: "+ v);
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}