commiting spring reactor (#922)

* commiting spring reactor

* updating exception handling

pom.xml

@@ -163,6 +163,7 @@
         <module>spring-thymeleaf</module>
         <module>spring-userservice</module>
         <module>spring-zuul</module>
+        <module>spring-reactor</module>
 
         <module>testing</module>
 

spring-reactor/pom.xml

@@ -0,0 +1,67 @@
+<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/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.baeldung</groupId>
+  <artifactId>spring-reactor</artifactId>
+  <packaging>jar</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <name>spring-reactor</name>
+  <url>http://maven.apache.org</url>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.4.2.RELEASE</version>
+	</parent>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+        </dependency>        
+		<dependency>
+			<groupId>io.projectreactor</groupId>
+			<artifactId>reactor-bus</artifactId>
+		</dependency>
+	</dependencies>
+
+	  <build>
+	    <plugins>
+	      <plugin>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-maven-plugin</artifactId>
+	      </plugin>
+	    </plugins>
+	  </build>
+
+	<repositories>
+	    <repository>
+		<id>spring-snapshots</id>
+		<name>Spring Snapshots</name>
+		<url>https://repo.spring.io/libs-snapshot</url>
+		<snapshots>
+		    <enabled>true</enabled>
+		</snapshots>
+	    </repository>
+	</repositories>
+        <pluginRepositories>
+	    <pluginRepository>
+	        <id>spring-releases</id>
+		<name>Spring Releases</name>
+	    	<url>https://repo.spring.io/libs-release</url>
+	    </pluginRepository>
+	</pluginRepositories>
+	
+</project>

spring-reactor/src/main/java/com/baeldung/Application.java

@@ -0,0 +1,49 @@
+package com.baeldung;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+import com.baeldung.consumer.NotificationConsumer;
+
+import reactor.Environment;
+import reactor.bus.EventBus;
+
+import static reactor.bus.selector.Selectors.$;
+
+
+@Configuration
+@EnableAutoConfiguration
+@ComponentScan
+public class Application implements CommandLineRunner {
+	
+	@Autowired
+	private EventBus eventBus;
+	
+	@Autowired
+	private NotificationConsumer notificationConsumer;
+	
+    @Bean
+    Environment env() {
+        return Environment.initializeIfEmpty().assignErrorJournal();
+    }
+    
+    @Bean
+    EventBus createEventBus(Environment env) {
+	    return EventBus.create(env, Environment.THREAD_POOL);
+    }
+
+	@Override
+	public void run(String... args) throws Exception {
+		eventBus.on($("notificationConsumer"), notificationConsumer);
+	}
+
+	public static void main(String[] args){
+		SpringApplication.run(Application.class, args);
+	}
+
+}

spring-reactor/src/main/java/com/baeldung/consumer/NotificationConsumer.java

@@ -0,0 +1,28 @@
+package com.baeldung.consumer;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.baeldung.doman.NotificationData;
+import com.baeldung.service.NotificationService;
+
+import reactor.bus.Event;
+import reactor.fn.Consumer;
+
+@Service
+public class NotificationConsumer implements Consumer<Event<NotificationData>> {
+
+	@Autowired
+	private NotificationService notificationService;
+	
+	@Override
+	public void accept(Event<NotificationData> notificationDataEvent) {
+		
+		NotificationData notificationData = notificationDataEvent.getData();
+		try {
+			notificationService.initiateNotofication(notificationData);
+		} catch (InterruptedException e) {}
+		
+	}
+
+}

spring-reactor/src/main/java/com/baeldung/controller/NotificationController.java

@@ -0,0 +1,37 @@
+package com.baeldung.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+import com.baeldung.doman.NotificationData;
+
+import reactor.bus.Event;
+import reactor.bus.EventBus;
+
+@Controller
+public class NotificationController {
+	
+	@Autowired
+	private EventBus eventBus;
+
+	@RequestMapping(value = "/startNotification/{param}", method = RequestMethod.GET)
+	public void startNotification(@PathVariable("param") String param) {
+	
+		int notificationSize = Integer.parseInt(param);
+		
+		for(int i = 0; i < notificationSize; i++) {
+		
+			NotificationData data = new NotificationData();
+			data.setId(i);
+			
+			eventBus.notify("notificationConsumer",Event.wrap(data));
+			
+			System.out.println("Notification " +i +": notification task submitted successfully");
+		}
+		
+	}
+	
+}

spring-reactor/src/main/java/com/baeldung/doman/NotificationData.java

@@ -0,0 +1,35 @@
+package com.baeldung.doman;
+
+public class NotificationData {
+	
+	private long id;
+	private String name;
+	private String email;
+	private String mobile;
+
+	public long getId() {
+		return id;
+	}
+	public void setId(long id) {
+		this.id = id;
+	}
+	public String getName() {
+		return name;
+	}
+	public void setName(String name) {
+		this.name = name;
+	}
+	public String getEmail() {
+		return email;
+	}
+	public void setEmail(String email) {
+		this.email = email;
+	}
+	public String getMobile() {
+		return mobile;
+	}
+	public void setMobile(String mobile) {
+		this.mobile = mobile;
+	}
+
+}

spring-reactor/src/main/java/com/baeldung/service/NotificationService.java

@@ -0,0 +1,9 @@
+package com.baeldung.service;
+
+import com.baeldung.doman.NotificationData;
+
+public interface NotificationService {
+
+	public void initiateNotofication(NotificationData notificationData) throws InterruptedException;
+	
+}

spring-reactor/src/main/java/com/baeldung/service/impl/NotificationServiceimpl.java

@@ -0,0 +1,21 @@
+package com.baeldung.service.impl;
+
+import org.springframework.stereotype.Service;
+
+import com.baeldung.doman.NotificationData;
+import com.baeldung.service.NotificationService;
+
+@Service
+public class NotificationServiceimpl implements NotificationService {
+	
+	@Override
+	public void initiateNotofication(NotificationData notificationData) throws InterruptedException {
+
+		System.out.println("Notification service started for Notification ID: " +notificationData.getId());
+		
+		Thread.sleep(5000);
+		
+		System.out.println("Notification service ended for Notification ID: " +notificationData.getId());
+	}
+
+}