Add Atmosphere sample application

Add Atmosphere example application based on
http://github.com/Atmosphere/atmosphere-samples/tree/master/samples/chat

Closes spring-projectsgh-2341

spring-boot-samples/pom.xml

@@ -27,6 +27,7 @@
 		<module>spring-boot-sample-actuator-ui</module>
 		<module>spring-boot-sample-amqp</module>
 		<module>spring-boot-sample-aop</module>
+		<module>spring-boot-sample-atmosphere</module>
 		<module>spring-boot-sample-batch</module>
 		<module>spring-boot-sample-data-elasticsearch</module>
 		<module>spring-boot-sample-data-gemfire</module>

spring-boot-samples/spring-boot-sample-atmosphere/pom.xml

@@ -0,0 +1,61 @@
+<?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>
+	<parent>
+		<!-- Your own application should inherit from spring-boot-starter-parent -->
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-samples</artifactId>
+		<version>1.2.2.BUILD-SNAPSHOT</version>
+	</parent>
+	<artifactId>spring-boot-sample-atmosphere</artifactId>
+	<name>Spring Boot Atmosphere Sample</name>
+	<description>Spring Boot Atmosphere Sample</description>
+	<url>http://projects.spring.io/spring-boot/</url>
+	<organization>
+		<name>Pivotal Software, Inc.</name>
+		<url>http://www.spring.io</url>
+	</organization>
+	<properties>
+		<main.basedir>${basedir}/../..</main.basedir>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>javax.inject</groupId>
+			<artifactId>javax.inject</artifactId>
+			<version>1</version>
+		</dependency>
+		<dependency>
+			<groupId>org.atmosphere</groupId>
+			<artifactId>atmosphere-runtime</artifactId>
+			<version>2.2.4</version>
+		</dependency>
+		<dependency>
+			<groupId>org.webjars</groupId>
+			<artifactId>atmosphere-javascript</artifactId>
+			<version>2.2.3</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-websocket</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

spring-boot-samples/spring-boot-sample-atmosphere/src/main/java/sample/ChatService.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample;
+
+import java.io.IOException;
+
+import org.atmosphere.config.managed.Decoder;
+import org.atmosphere.config.managed.Encoder;
+import org.atmosphere.config.service.Disconnect;
+import org.atmosphere.config.service.ManagedService;
+import org.atmosphere.config.service.Ready;
+import org.atmosphere.cpr.AtmosphereResource;
+import org.atmosphere.cpr.AtmosphereResourceEvent;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@ManagedService(path = "/chat")
+public class ChatService {
+
+	private final Logger logger = LoggerFactory.getLogger(ChatService.class);
+
+	@Ready
+	public void onReady(final AtmosphereResource resource) {
+		this.logger.info("Connected", resource.uuid());
+	}
+
+	@Disconnect
+	public void onDisconnect(AtmosphereResourceEvent event) {
+		this.logger.info("Client {} disconnected [{}]", event.getResource().uuid(),
+				(event.isCancelled() ? "cancelled" : "closed"));
+	}
+
+	@org.atmosphere.config.service.Message(encoders = JacksonEncoderDecoder.class, decoders = JacksonEncoderDecoder.class)
+	public Message onMessage(Message message) throws IOException {
+		this.logger.info("Author {} sent message {}", message.getAuthor(),
+				message.getMessage());
+		return message;
+	}
+
+	public static class JacksonEncoderDecoder implements Encoder<Message, String>,
+			Decoder<String, Message> {
+
+		private final ObjectMapper mapper = new ObjectMapper();
+
+		@Override
+		public String encode(Message m) {
+			try {
+				return this.mapper.writeValueAsString(m);
+			}
+			catch (IOException ex) {
+				throw new IllegalStateException(ex);
+			}
+		}
+
+		@Override
+		public Message decode(String s) {
+			try {
+				return this.mapper.readValue(s, Message.class);
+			}
+			catch (IOException ex) {
+				throw new IllegalStateException(ex);
+			}
+		}
+
+	}
+
+}

spring-boot-samples/spring-boot-sample-atmosphere/src/main/java/sample/Message.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample;
+
+import java.util.Date;
+
+public class Message {
+
+	private String message;
+
+	private String author;
+
+	private long time = new Date().getTime();
+
+	public String getMessage() {
+		return this.message;
+	}
+
+	public void setMessage(String message) {
+		this.message = message;
+	}
+
+	public String getAuthor() {
+		return this.author;
+	}
+
+	public void setAuthor(String author) {
+		this.author = author;
+	}
+
+	public long getTime() {
+		return this.time;
+	}
+
+	public void setTime(long time) {
+		this.time = time;
+	}
+}

spring-boot-samples/spring-boot-sample-atmosphere/src/main/java/sample/SampleAtmosphereApplication.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample;
+
+import java.util.Collections;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+
+import org.atmosphere.cpr.AtmosphereInitializer;
+import org.atmosphere.cpr.AtmosphereServlet;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.context.embedded.ServletContextInitializer;
+import org.springframework.boot.context.embedded.ServletRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.Ordered;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+
+@Configuration
+@EnableAutoConfiguration
+public class SampleAtmosphereApplication {
+
+	@Bean
+	public EmbeddedAtmosphereInitializer atmosphereInitializer() {
+		return new EmbeddedAtmosphereInitializer();
+	}
+
+	@Bean
+	public ServletRegistrationBean atmosphereServlet() {
+		// Dispatcher servlet is mapped to '/home' to allow the AtmosphereServlet
+		// to be mapped to '/chat'
+		ServletRegistrationBean registration = new ServletRegistrationBean(
+				new AtmosphereServlet(), "/chat/*");
+		registration.addInitParameter("org.atmosphere.cpr.packages", "sample");
+		registration.addInitParameter("org.atmosphere.interceptor.HeartbeatInterceptor"
+				+ ".clientHeartbeatFrequencyInSeconds", "10");
+		registration.setLoadOnStartup(0);
+		// Need to occur before the EmbeddedAtmosphereInitializer
+		registration.setOrder(Ordered.HIGHEST_PRECEDENCE);
+		return registration;
+	}
+
+	@Configuration
+	static class MvcConfiguration extends WebMvcConfigurerAdapter {
+
+		@Override
+		public void addViewControllers(ViewControllerRegistry registry) {
+			registry.addViewController("/").setViewName("forward:/home/home.html");
+		}
+
+	}
+
+	private static class EmbeddedAtmosphereInitializer extends AtmosphereInitializer
+			implements ServletContextInitializer {
+
+		@Override
+		public void onStartup(ServletContext servletContext) throws ServletException {
+			onStartup(Collections.<Class<?>> emptySet(), servletContext);
+		}
+
+	}
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleAtmosphereApplication.class, args);
+	}
+}

spring-boot-samples/spring-boot-sample-atmosphere/src/main/resources/application.properties

@@ -0,0 +1 @@
+server.servlet-path=/home/*

spring-boot-samples/spring-boot-sample-atmosphere/src/main/resources/static/home.html

@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Atmosphere Chat</title>
+<!-- Atmosphere -->
+<script type="text/javascript" src="webjars/atmosphere-javascript/2.2.3/atmosphere.js"></script>
+<!-- Application -->
+<script type="text/javascript" src="javascript/jquery-1.9.0.js"></script>
+<script type="text/javascript" src="javascript/application.js"></script>
+<style>
+* {
+	font-family: tahoma;
+	font-size: 12px;
+	padding: 0px;
+	margin: 0px;
+}
+
+p {
+	line-height: 18px;
+}
+
+div {
+	width: 500px;
+	margin-left: auto;
+	margin-right: auto;
+}
+
+#content {
+	padding: 5px;
+	background: #ddd;
+	border-radius: 5px;
+	border: 1px solid #CCC;
+	margin-top: 10px;
+}
+
+#header {
+	padding: 5px;
+	background: #f5deb3;
+	border-radius: 5px;
+	border: 1px solid #CCC;
+	margin-top: 10px;
+}
+
+#input {
+	border-radius: 2px;
+	border: 1px solid #ccc;
+	margin-top: 10px;
+	padding: 5px;
+	width: 400px;
+}
+
+#status {
+	width: 88px;
+	display: block;
+	float: left;
+	margin-top: 15px;
+}
+</style>
+</head>
+<body>
+	<div id="header">
+		<h3>Atmosphere Chat. Default transport is WebSocket, fallback is
+			long-polling</h3>
+	</div>
+	<div id="content"></div>
+	<div>
+		<span id="status">Connecting...</span> <input type="text" id="input"
+			disabled="disabled" />
+	</div>
+</body>
+</html>