├── .gitignore
├── README.md
├── pom.xml
├── quote-app
    ├── pom.xml
    └── src
    │   └── main
    │       ├── java
    │           └── com
    │           │   └── example
    │           │       ├── QuoteApplication.java
    │           │       ├── domain
    │           │           ├── User.java
    │           │           └── UserRepository.java
    │           │       └── web
    │           │           ├── MainController.java
    │           │           └── Quote.java
    │       └── resources
    │           └── templates
    │               ├── index.html
    │               └── quotes.html
└── quote-service
    ├── pom.xml
    └── src
        └── main
            ├── kotlin
                └── com
                │   └── example
                │       └── quote
                │           ├── Quote.kt
                │           ├── QuoteGenerator.kt
                │           ├── QuoteHandler.kt
                │           ├── QuoteRoutes.kt
                │           └── QuoteService.kt
            └── resources
                └── application.properties


/.gitignore:
--------------------------------------------------------------------------------
 1 | target/
 2 | !.mvn/wrapper/maven-wrapper.jar
 3 | 
 4 | ### STS ###
 5 | .apt_generated
 6 | .classpath
 7 | .factorypath
 8 | .project
 9 | .settings
10 | .springBeans
11 | 
12 | ### IntelliJ IDEA ###
13 | .idea
14 | *.iws
15 | *.iml
16 | *.ipr
17 | 
18 | ### NetBeans ###
19 | nbproject/private/
20 | build/
21 | nbbuild/
22 | dist/
23 | nbdist/
24 | .nb-gradle/


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # Web flux streaming demo
 2 | 
 3 | This demo application showcases some of the features of the reactive support in Spring
 4 | Framework 5.
 5 | 
 6 | `quote-service` is a functional-based kotlin service that emits a "random" quote every
 7 | 200ms, either as server-sent events (SSE) or json stream.
 8 | 
 9 | `quote-app` uses embedded MongoDB and the upcoming reactive MongoDB support to showcase
10 | how a template engine can integrate with this new paradigm. It also has a UI that uses
11 | display the value of a set of actions live. For that, it uses the new `WebClient` API on
12 | the server side to get the values from the `quote-service` in a reactive fashion.
13 | 
14 | To run the demo, simply start the two apps and go to `http://localhost:8080`.


--------------------------------------------------------------------------------
/pom.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0"
 3 | 		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4 | 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 | 	<modelVersion>4.0.0</modelVersion>
 6 | 	<parent>
 7 | 		<groupId>org.springframework.boot</groupId>
 8 | 		<artifactId>spring-boot-starter-parent</artifactId>
 9 | 		<version>2.0.0.M1</version>
10 | 		<relativePath/>
11 | 	</parent>
12 | 	<groupId>com.example</groupId>
13 | 	<artifactId>demo-webflux-streaming</artifactId>
14 | 	<version>0.0.1-SNAPSHOT</version>
15 | 	<packaging>pom</packaging>
16 | 	<name>WebFlux streaming demo</name>
17 | 
18 | 	<properties>
19 | 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
20 | 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
21 | 		<java.version>1.8</java.version>
22 | 	</properties>
23 | 
24 | 	<modules>
25 | 		<module>quote-app</module>
26 | 		<module>quote-service</module>
27 | 	</modules>
28 | 
29 | 	<dependencyManagement>
30 | 		<dependencies>
31 | 			<dependency>
32 | 				<groupId>org.webjars</groupId>
33 | 				<artifactId>bootstrap</artifactId>
34 | 				<version>3.3.7</version>
35 | 			</dependency>
36 | 			<dependency>
37 | 				<groupId>org.webjars</groupId>
38 | 				<artifactId>highcharts</artifactId>
39 | 				<version>5.0.8</version>
40 | 			</dependency>
41 | 		</dependencies>
42 | 	</dependencyManagement>
43 | 
44 | 	<repositories>
45 | 		<repository>
46 | 			<id>spring-snapshots</id>
47 | 			<name>Spring Snapshots</name>
48 | 			<url>https://repo.spring.io/snapshot</url>
49 | 			<snapshots>
50 | 				<enabled>true</enabled>
51 | 			</snapshots>
52 | 		</repository>
53 | 		<repository>
54 | 			<id>spring-milestones</id>
55 | 			<name>Spring Milestones</name>
56 | 			<url>https://repo.spring.io/milestone</url>
57 | 			<snapshots>
58 | 				<enabled>false</enabled>
59 | 			</snapshots>
60 | 		</repository>
61 | 	</repositories>
62 | 	<pluginRepositories>
63 | 		<pluginRepository>
64 | 			<id>spring-snapshots</id>
65 | 			<name>Spring Snapshots</name>
66 | 			<url>https://repo.spring.io/snapshot</url>
67 | 			<snapshots>
68 | 				<enabled>true</enabled>
69 | 			</snapshots>
70 | 		</pluginRepository>
71 | 		<pluginRepository>
72 | 			<id>spring-milestones</id>
73 | 			<name>Spring Milestones</name>
74 | 			<url>https://repo.spring.io/milestone</url>
75 | 			<snapshots>
76 | 				<enabled>false</enabled>
77 | 			</snapshots>
78 | 		</pluginRepository>
79 | 	</pluginRepositories>
80 | 
81 | </project>
82 | 


--------------------------------------------------------------------------------
/quote-app/pom.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0"
 3 | 		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4 | 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 | 	<modelVersion>4.0.0</modelVersion>
 6 | 	<parent>
 7 | 		<groupId>com.example</groupId>
 8 | 		<artifactId>demo-webflux-streaming</artifactId>
 9 | 		<version>0.0.1-SNAPSHOT</version>
10 | 	</parent>
11 | 	<artifactId>quote-app</artifactId>
12 | 	<packaging>jar</packaging>
13 | 	<name>Quote App</name>
14 | 
15 | 	<dependencies>
16 | 		<dependency>
17 | 			<groupId>org.springframework.boot</groupId>
18 | 			<artifactId>spring-boot-starter-webflux</artifactId>
19 | 		</dependency>
20 | 		<dependency>
21 | 			<groupId>org.springframework.boot</groupId>
22 | 			<artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
23 | 		</dependency>
24 | 		<dependency>
25 | 			<groupId>org.springframework.boot</groupId>
26 | 			<artifactId>spring-boot-starter-thymeleaf</artifactId>
27 | 		</dependency>
28 | 
29 | 		<dependency>
30 | 			<groupId>com.fasterxml.jackson.datatype</groupId>
31 | 			<artifactId>jackson-datatype-jsr310</artifactId>
32 | 		</dependency>
33 | 
34 | 		<dependency>
35 | 			<groupId>org.springframework.boot</groupId>
36 | 			<artifactId>spring-boot-devtools</artifactId>
37 | 			<optional>true</optional>
38 | 		</dependency>
39 | 
40 | 		<dependency>
41 | 			<groupId>de.flapdoodle.embed</groupId>
42 | 			<artifactId>de.flapdoodle.embed.mongo</artifactId>
43 | 			<scope>runtime</scope>
44 | 		</dependency>
45 | 
46 | 		<dependency>
47 | 			<groupId>org.webjars</groupId>
48 | 			<artifactId>bootstrap</artifactId>
49 | 			<scope>runtime</scope>
50 | 		</dependency>
51 | 		<dependency>
52 | 			<groupId>org.webjars</groupId>
53 | 			<artifactId>highcharts</artifactId>
54 | 			<scope>runtime</scope>
55 | 		</dependency>
56 | 	</dependencies>
57 | 
58 | 	<build>
59 | 		<plugins>
60 | 			<plugin>
61 | 				<groupId>org.springframework.boot</groupId>
62 | 				<artifactId>spring-boot-maven-plugin</artifactId>
63 | 			</plugin>
64 | 		</plugins>
65 | 	</build>
66 | 
67 | </project>
68 | 


--------------------------------------------------------------------------------
/quote-app/src/main/java/com/example/QuoteApplication.java:
--------------------------------------------------------------------------------
 1 | package com.example;
 2 | 
 3 | import java.time.Duration;
 4 | import java.util.Arrays;
 5 | import java.util.List;
 6 | 
 7 | import com.example.domain.User;
 8 | import com.example.domain.UserRepository;
 9 | 
10 | import org.springframework.boot.CommandLineRunner;
11 | import org.springframework.boot.SpringApplication;
12 | import org.springframework.boot.autoconfigure.SpringBootApplication;
13 | import org.springframework.context.annotation.Bean;
14 | 
15 | @SpringBootApplication
16 | public class QuoteApplication {
17 | 
18 | 	public static void main(String[] args) {
19 | 		SpringApplication.run(QuoteApplication.class, args);
20 | 	}
21 | 
22 | 	@Bean
23 | 	public CommandLineRunner createUsers(UserRepository userRepository) {
24 | 		return strings -> {
25 | 			List<User> users = Arrays.asList(
26 | 					new User("sdeleuze", "Sebastien Deleuze"),
27 | 					new User("bclozel", "Brian Clozel"),
28 | 					new User("rstoyanchev", "Rossen Stoyanchev"),
29 | 					new User("smaldini", "Stephane Maldini"),
30 | 					new User("sbasle", "Simon Basle"),
31 | 					new User("snicoll", "Stephane Nicoll")
32 | 			);
33 | 			userRepository.saveAll(users).blockLast(Duration.ofSeconds(3));
34 | 		};
35 | 	}
36 | 
37 | }
38 | 


--------------------------------------------------------------------------------
/quote-app/src/main/java/com/example/domain/User.java:
--------------------------------------------------------------------------------
 1 | package com.example.domain;
 2 | 
 3 | import org.springframework.data.annotation.Id;
 4 | import org.springframework.data.mongodb.core.mapping.Document;
 5 | 
 6 | @Document
 7 | public class User {
 8 | 
 9 | 	@Id
10 | 	private String id;
11 | 
12 | 	private String github;
13 | 
14 | 	private String name;
15 | 
16 | 	public User() {
17 | 	}
18 | 
19 | 	public User(String github, String name) {
20 | 		this.github = github;
21 | 		this.name = name;
22 | 	}
23 | 
24 | 	public String getId() {
25 | 		return id;
26 | 	}
27 | 
28 | 	public void setId(String id) {
29 | 		this.id = id;
30 | 	}
31 | 
32 | 	public String getGithub() {
33 | 		return github;
34 | 	}
35 | 
36 | 	public void setGithub(String github) {
37 | 		this.github = github;
38 | 	}
39 | 
40 | 	public String getName() {
41 | 		return name;
42 | 	}
43 | 
44 | 	public void setName(String name) {
45 | 		this.name = name;
46 | 	}
47 | 
48 | }
49 | 


--------------------------------------------------------------------------------
/quote-app/src/main/java/com/example/domain/UserRepository.java:
--------------------------------------------------------------------------------
 1 | package com.example.domain;
 2 | 
 3 | import reactor.core.publisher.Mono;
 4 | 
 5 | import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
 6 | 
 7 | public interface UserRepository extends ReactiveMongoRepository<User, String> {
 8 | 
 9 | 	Mono<User> findUserByGithub(String github);
10 | 
11 | }
12 | 


--------------------------------------------------------------------------------
/quote-app/src/main/java/com/example/web/MainController.java:
--------------------------------------------------------------------------------
 1 | package com.example.web;
 2 | 
 3 | import com.example.domain.UserRepository;
 4 | import reactor.core.publisher.Flux;
 5 | 
 6 | import org.springframework.http.MediaType;
 7 | import org.springframework.stereotype.Controller;
 8 | import org.springframework.ui.Model;
 9 | import org.springframework.web.bind.annotation.GetMapping;
10 | import org.springframework.web.bind.annotation.ResponseBody;
11 | import org.springframework.web.reactive.function.client.WebClient;
12 | 
13 | @Controller
14 | public class MainController {
15 | 
16 | 	private final UserRepository userRepository;
17 | 
18 | 	private final WebClient webClient;
19 | 
20 | 	private final Flux<Quote> quotesFeed;
21 | 
22 | 	public MainController(UserRepository userRepository) {
23 | 		this.userRepository = userRepository;
24 | 		this.webClient = WebClient.create("http://localhost:8081");
25 | 		this.quotesFeed = this.webClient.get()
26 | 				.uri("/quotes")
27 | 				.accept(MediaType.APPLICATION_STREAM_JSON)
28 | 				.retrieve()
29 | 				.bodyToFlux(Quote.class)
30 | 				.share()
31 | 				.log();
32 | 	}
33 | 
34 | 	@GetMapping("/")
35 | 	public String home(Model model) {
36 | 		model.addAttribute("users", this.userRepository.findAll());
37 | 		return "index";
38 | 	}
39 | 
40 | 	@GetMapping("/quotes")
41 | 	public String quotes() {
42 | 		return "quotes";
43 | 	}
44 | 
45 | 	@GetMapping(path = "/quotes/feed", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
46 | 	@ResponseBody
47 | 	public Flux<Quote> fetchQuotesStream() {
48 | 		return quotesFeed;
49 | 	}
50 | 
51 | }
52 | 


--------------------------------------------------------------------------------
/quote-app/src/main/java/com/example/web/Quote.java:
--------------------------------------------------------------------------------
 1 | package com.example.web;
 2 | 
 3 | import java.math.BigDecimal;
 4 | import java.math.MathContext;
 5 | import java.time.Instant;
 6 | 
 7 | class Quote {
 8 | 
 9 | 	private static final MathContext MATH_CONTEXT = new MathContext(2);
10 | 
11 | 	private String ticker;
12 | 
13 | 	private BigDecimal price;
14 | 
15 | 	private Instant instant;
16 | 
17 | 	public Quote() {
18 | 	}
19 | 
20 | 	public Quote(String ticker, BigDecimal price) {
21 | 		this.ticker = ticker;
22 | 		this.price = price;
23 | 	}
24 | 
25 | 	public Quote(String ticker, Double price) {
26 | 		this(ticker, new BigDecimal(price, MATH_CONTEXT));
27 | 	}
28 | 
29 | 	public String getTicker() {
30 | 		return ticker;
31 | 	}
32 | 
33 | 	public void setTicker(String ticker) {
34 | 		this.ticker = ticker;
35 | 	}
36 | 
37 | 	public BigDecimal getPrice() {
38 | 		return price;
39 | 	}
40 | 
41 | 	public void setPrice(BigDecimal price) {
42 | 		this.price = price;
43 | 	}
44 | 
45 | 	public Instant getInstant() {
46 | 		return instant;
47 | 	}
48 | 
49 | 	public void setInstant(Instant instant) {
50 | 		this.instant = instant;
51 | 	}
52 | 
53 | 	public void setInstant(long epoch) {
54 | 		this.instant = Instant.ofEpochSecond(epoch);
55 | 	}
56 | 
57 | 	@Override
58 | 	public String toString() {
59 | 		return "Quote{" +
60 | 				"ticker='" + ticker + '\'' +
61 | 				", price=" + price +
62 | 				", instant=" + instant +
63 | 				'}';
64 | 	}
65 | 
66 | }
67 | 


--------------------------------------------------------------------------------
/quote-app/src/main/resources/templates/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en" xmlns:th="http://www.thymeleaf.org">
 3 | <head>
 4 |     <meta charset="utf-8"/>
 5 |     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1"/>
 7 |     <meta name="description" content="Spring WebFlux Streaming"/>
 8 |     <meta name="author" content="Brian Clozel and Sebastien Deleuze"/>
 9 |     <title>Spring WebFlux Streaming</title>
10 |     <link rel="stylesheet" href="/webjars/bootstrap/3.3.7/css/bootstrap-theme.min.css"/>
11 |     <link rel="stylesheet" href="/webjars/bootstrap/3.3.7/css/bootstrap.min.css"/>
12 | </head>
13 | <body>
14 | <nav class="navbar navbar-default">
15 |     <div class="container-fluid">
16 |         <div class="navbar-header">
17 |             <a class="navbar-brand" href="/">Spring WebFlux Streaming</a>
18 |         </div>
19 |         <div id="navbar" class="navbar-collapse collapse">
20 |             <ul class="nav navbar-nav">
21 |                 <li class="active"><a href="/">Home</a></li>
22 |                 <li><a href="/quotes">Quotes</a></li>
23 |             </ul>
24 |         </div>
25 |     </div>
26 | </nav>
27 | <div class="container wrapper">
28 |     <h2>List of Spring developers</h2>
29 |     <table class="table table-striped">
30 |         <thead>
31 |         <tr>
32 |             <th>#</th>
33 |             <th>Github</th>
34 |             <th>Name</th>
35 |         </tr>
36 |         </thead>
37 |         <tbody>
38 |         <tr th:each="user: ${users}">
39 |             <th th:text="${user.id}">42</th>
40 |             <td><a th:href="@{'https://github.com/'+${user.github}}" th:text="${user.github}">githubUser</a></td>
41 |             <td th:text="${user.name}">Jane Doe</td>
42 |         </tr>
43 |         </tbody>
44 |     </table>
45 | </div>
46 | <script type="text/javascript" src="/webjars/jquery/1.11.1/jquery.min.js"></script>
47 | <script type="text/javascript" src="/webjars/bootstrap/3.3.7/js/bootstrap.min.js"></script>
48 | </body>
49 | </html>


--------------------------------------------------------------------------------
/quote-app/src/main/resources/templates/quotes.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en" xmlns:th="http://www.thymeleaf.org">
 3 | <head>
 4 |     <meta charset="utf-8"/>
 5 |     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1"/>
 7 |     <meta name="description" content="Spring WebFlux Streaming"/>
 8 |     <meta name="author" content="Brian Clozel and Sebastien Deleuze"/>
 9 |     <title>Spring WebFlux Streaming</title>
10 |     <link rel="stylesheet" href="/webjars/bootstrap/3.3.7/css/bootstrap-theme.min.css"/>
11 |     <link rel="stylesheet" href="/webjars/bootstrap/3.3.7/css/bootstrap.min.css"/>
12 |     <link rel="stylesheet" href="/webjars/highcharts/5.0.8/css/highcharts.css"/>
13 | </head>
14 | <body>
15 | <nav class="navbar navbar-default">
16 |     <div class="container-fluid">
17 |         <div class="navbar-header">
18 |             <a class="navbar-brand" href="/">Spring WebFlux Streaming</a>
19 |         </div>
20 |         <div id="navbar" class="navbar-collapse collapse">
21 |             <ul class="nav navbar-nav">
22 |                 <li><a href="/">Home</a></li>
23 |                 <li class="active"><a href="/quotes">Quotes</a></li>
24 |             </ul>
25 |         </div>
26 |     </div>
27 | </nav>
28 | <div class="container wrapper">
29 |     <div id="chart" style="height: 400px; min-width: 310px"></div>
30 | </div>
31 | <script type="text/javascript" src="/webjars/jquery/1.11.1/jquery.min.js"></script>
32 | <script type="text/javascript" src="/webjars/highcharts/5.0.8/highcharts.js"></script>
33 | <script type="text/javascript" src="/webjars/bootstrap/3.3.7/js/bootstrap.min.js"></script>
34 | <script type="text/javascript">
35 |     var chart = new Highcharts.chart('chart', {
36 |         title: {
37 |             text: 'My Stock Portfolio'
38 |         },
39 |         yAxis: {
40 |             title: {
41 |                 text: 'Stock Price'
42 |             }
43 |         },
44 |         legend: {
45 |             layout: 'vertical',
46 |             align: 'right',
47 |             verticalAlign: 'middle'
48 |         },
49 |         xAxis: {
50 |             type: 'datetime',
51 |         },
52 |         series: [{
53 |             name: 'CTXS',
54 |             data: []
55 |         }, {
56 |             name: 'MSFT',
57 |             data: []
58 |         }, {
59 |             name: 'ORCL',
60 |             data: []
61 |         }, {
62 |             name: 'RHT',
63 |             data: []
64 |         }, {
65 |             name: 'VMW',
66 |             data: []
67 |         }, {
68 |             name: 'DELL',
69 |             data: []
70 |         }]
71 | 
72 |     });
73 |     var appendStockData = function (quote) {
74 |         chart.series
75 |             .filter(function (serie) {
76 |                 return serie.name == quote.ticker
77 |             })
78 |             .forEach(function (serie) {
79 |                 var shift = serie.data.length > 40;
80 |                 serie.addPoint([quote.instant * 1000, quote.price], true, shift);
81 |             });
82 |     };
83 |     var stockEventSource = new EventSource("/quotes/feed");
84 |     stockEventSource.onmessage = function (e) {
85 |         appendStockData(JSON.parse(e.data));
86 |     }
87 | </script>
88 | </body>
89 | </html>


--------------------------------------------------------------------------------
/quote-service/pom.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0"
 3 | 		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4 | 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5 | 	<modelVersion>4.0.0</modelVersion>
 6 | 	<parent>
 7 | 		<groupId>com.example</groupId>
 8 | 		<artifactId>demo-webflux-streaming</artifactId>
 9 | 		<version>0.0.1-SNAPSHOT</version>
10 | 	</parent>
11 | 	<artifactId>quote-service</artifactId>
12 | 	<packaging>jar</packaging>
13 | 	<name>Quote service</name>
14 | 
15 | 	<properties>
16 | 		<kotlin.version>1.1.2</kotlin.version>
17 | 	</properties>
18 | 
19 | 	<dependencies>
20 | 		<dependency>
21 | 			<groupId>org.springframework.boot</groupId>
22 | 			<artifactId>spring-boot-starter-webflux</artifactId>
23 | 		</dependency>
24 | 
25 | 		<dependency>
26 | 			<groupId>com.fasterxml.jackson.datatype</groupId>
27 | 			<artifactId>jackson-datatype-jsr310</artifactId>
28 | 		</dependency>
29 | 
30 | 		<dependency>
31 | 			<groupId>org.jetbrains.kotlin</groupId>
32 | 			<artifactId>kotlin-stdlib-jre8</artifactId>
33 | 			<version>${kotlin.version}</version>
34 | 		</dependency>
35 | 		<dependency>
36 | 			<groupId>org.jetbrains.kotlin</groupId>
37 | 			<artifactId>kotlin-reflect</artifactId>
38 | 			<version>${kotlin.version}</version>
39 | 		</dependency>
40 | 
41 | 		<dependency>
42 | 			<groupId>org.springframework.boot</groupId>
43 | 			<artifactId>spring-boot-devtools</artifactId>
44 | 			<optional>true</optional>
45 | 		</dependency>
46 | 	</dependencies>
47 | 
48 | 	<build>
49 | 		<sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
50 | 		<testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
51 | 		<plugins>
52 | 			<plugin>
53 | 				<groupId>org.springframework.boot</groupId>
54 | 				<artifactId>spring-boot-maven-plugin</artifactId>
55 | 			</plugin>
56 | 			<plugin>
57 | 				<groupId>org.jetbrains.kotlin</groupId>
58 | 				<artifactId>kotlin-maven-plugin</artifactId>
59 | 				<version>${kotlin.version}</version>
60 | 				<configuration>
61 | 					<compilerPlugins>
62 | 						<plugin>spring</plugin>
63 | 					</compilerPlugins>
64 | 					<jvmTarget>1.8</jvmTarget>
65 | 				</configuration>
66 | 				<executions>
67 | 					<execution>
68 | 						<id>compile</id>
69 | 						<phase>compile</phase>
70 | 						<goals>
71 | 							<goal>compile</goal>
72 | 						</goals>
73 | 					</execution>
74 | 					<execution>
75 | 						<id>test-compile</id>
76 | 						<phase>test-compile</phase>
77 | 						<goals>
78 | 							<goal>test-compile</goal>
79 | 						</goals>
80 | 					</execution>
81 | 				</executions>
82 | 				<dependencies>
83 | 					<dependency>
84 | 						<groupId>org.jetbrains.kotlin</groupId>
85 | 						<artifactId>kotlin-maven-allopen</artifactId>
86 | 						<version>${kotlin.version}</version>
87 | 					</dependency>
88 | 				</dependencies>
89 | 			</plugin>
90 | 		</plugins>
91 | 	</build>
92 | 
93 | </project>
94 | 


--------------------------------------------------------------------------------
/quote-service/src/main/kotlin/com/example/quote/Quote.kt:
--------------------------------------------------------------------------------
1 | package com.example.quote
2 | 
3 | import java.math.BigDecimal
4 | import java.time.Instant
5 | 
6 | data class Quote(val ticker: String, val price: BigDecimal, val instant: Instant = Instant.now())
7 | 


--------------------------------------------------------------------------------
/quote-service/src/main/kotlin/com/example/quote/QuoteGenerator.kt:
--------------------------------------------------------------------------------
 1 | package com.example.quote
 2 | 
 3 | import org.springframework.stereotype.Component
 4 | import reactor.core.publisher.Flux
 5 | import reactor.core.publisher.SynchronousSink
 6 | import java.math.BigDecimal
 7 | import java.math.MathContext
 8 | import java.time.Duration
 9 | import java.time.Instant
10 | import java.util.*
11 | 
12 | @Component
13 | class QuoteGenerator {
14 | 
15 |     val mathContext = MathContext(2)
16 | 
17 |     val random = Random()
18 | 
19 |     val prices = listOf(
20 |             Quote("CTXS", BigDecimal(82.26, mathContext)),
21 |             Quote("DELL", BigDecimal(63.74, mathContext)),
22 |             Quote("GOOG", BigDecimal(847.24, mathContext)),
23 |             Quote("MSFT", BigDecimal(65.11, mathContext)),
24 |             Quote("ORCL", BigDecimal(45.71, mathContext)),
25 |             Quote("RHT", BigDecimal(84.29, mathContext)),
26 |             Quote("VMW", BigDecimal(92.21, mathContext))
27 |     )
28 | 
29 | 
30 |     fun fetchQuoteStream(period: Duration) = Flux.generate({ 0 },
31 |             { index, sink: SynchronousSink<Quote> ->
32 |                 sink.next(updateQuote(prices[index]))
33 |                 (index + 1) % prices.size
34 |             }).zipWith(Flux.interval(period))
35 |             .map { it.t1.copy(instant = Instant.now()) }
36 |             .share()
37 |             .log()
38 | 
39 | 
40 |     private fun updateQuote(quote: Quote) = quote.copy(
41 |             price = quote.price.add(quote.price.multiply(
42 |                     BigDecimal(0.05 * random.nextDouble()), mathContext))
43 |     )
44 | 
45 | }
46 | 


--------------------------------------------------------------------------------
/quote-service/src/main/kotlin/com/example/quote/QuoteHandler.kt:
--------------------------------------------------------------------------------
 1 | package com.example.quote
 2 | 
 3 | import org.springframework.http.MediaType.APPLICATION_STREAM_JSON
 4 | import org.springframework.http.MediaType.TEXT_EVENT_STREAM
 5 | import org.springframework.stereotype.Component
 6 | import org.springframework.web.reactive.function.server.ServerRequest
 7 | import org.springframework.web.reactive.function.server.ServerResponse.ok
 8 | import org.springframework.web.reactive.function.server.body
 9 | import java.time.Duration.ofMillis
10 | 
11 | @Component
12 | class QuoteHandler(val quoteGenerator: QuoteGenerator) {
13 | 
14 |     fun fetchQuotesSSE(req: ServerRequest) = ok()
15 |             .contentType(TEXT_EVENT_STREAM)
16 |             .body(quoteGenerator.fetchQuoteStream(ofMillis(200)), Quote::class.java)
17 | 
18 |     fun fetchQuotes(req: ServerRequest) = ok()
19 |             .contentType(APPLICATION_STREAM_JSON)
20 |             .body(quoteGenerator.fetchQuoteStream(ofMillis(200)), Quote::class.java)
21 | 
22 | }
23 | 


--------------------------------------------------------------------------------
/quote-service/src/main/kotlin/com/example/quote/QuoteRoutes.kt:
--------------------------------------------------------------------------------
 1 | package com.example.quote
 2 | 
 3 | import org.springframework.context.annotation.Bean
 4 | import org.springframework.context.annotation.Configuration
 5 | import org.springframework.http.MediaType.APPLICATION_STREAM_JSON
 6 | import org.springframework.http.MediaType.TEXT_EVENT_STREAM
 7 | import org.springframework.web.reactive.function.server.router
 8 | 
 9 | @Configuration
10 | class QuoteRoutes(val quoteHandler: QuoteHandler) {
11 | 
12 |     @Bean
13 |     fun quoteRouter() = router {
14 |         GET("/quotes").nest {
15 |             accept(TEXT_EVENT_STREAM, quoteHandler::fetchQuotesSSE)
16 |             accept(APPLICATION_STREAM_JSON, quoteHandler::fetchQuotes)
17 |         }
18 |     }
19 | 
20 | }


--------------------------------------------------------------------------------
/quote-service/src/main/kotlin/com/example/quote/QuoteService.kt:
--------------------------------------------------------------------------------
 1 | package com.example.quote
 2 | 
 3 | import org.springframework.boot.SpringApplication
 4 | import org.springframework.boot.autoconfigure.SpringBootApplication
 5 | 
 6 | @SpringBootApplication
 7 | class QuoteService
 8 | 
 9 | fun main(args: Array<String>) {
10 |     SpringApplication.run(QuoteService::class.java, *args)
11 | }


--------------------------------------------------------------------------------
/quote-service/src/main/resources/application.properties:
--------------------------------------------------------------------------------
1 | server.port=8081
2 | 
3 | spring.jackson.serialization.write-date-timestamps-as-nanoseconds=false


--------------------------------------------------------------------------------