Adding source code for article tracked under BAEL-3172. (#7540)

* Adding source code for article tracked under BAEL-3172.

* Adding source code for article tracked under BAEL-3172.

* Adding source code for article tracked under BAEL-3172.

* Incorporated the review comments.

* Removing absolute URL from JS.

* Removing absolute URL from JS.

pom.xml

@@ -564,6 +564,8 @@
 				<module>spring-boot-flowable</module>
 				<module>spring-security-kerberos</module>
 				<module>oauth2-framework-impl</module>
+				
+				<module>spring-boot-nashorn</module>
 			</modules>
 
 		</profile>
@@ -798,6 +800,8 @@
 				<module>tensorflow-java</module>
 				<module>spring-boot-flowable</module>
 				<module>spring-security-kerberos</module>
+				
+				<module>spring-boot-nashorn</module>
 
 			</modules>
 
@@ -947,6 +951,7 @@
 
 				<module>spring-boot-flowable</module>
 				<module>spring-security-kerberos</module>
+				<module>spring-boot-nashorn</module>
 			</modules>
 
 		</profile>

spring-boot-nashorn/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+- []() 
+

spring-boot-nashorn/pom.xml

@@ -0,0 +1,51 @@
+<?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.nashorn</groupId>
+    <artifactId>spring-boot-nashorn</artifactId>
+    <name>spring-boot-nashorn</name>
+    <version>1.0</version>
+    <packaging>jar</packaging>
+
+    <parent>
+        <artifactId>parent-boot-2</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tomcat.embed</groupId>
+            <artifactId>tomcat-embed-jasper</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-boot-nashorn/src/main/java/com/baeldung/nashorn/Application.java

@@ -0,0 +1,20 @@
+package com.baeldung.nashorn;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+
+@SpringBootApplication
+public class Application extends SpringBootServletInitializer {
+
+    @Override
+    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+        return application.sources(Application.class);
+    }
+
+    public static void main(String[] args) throws Exception {
+        SpringApplication.run(Application.class, args);
+    }
+
+}

spring-boot-nashorn/src/main/java/com/baeldung/nashorn/controller/MyRestController.java

@@ -0,0 +1,14 @@
+package com.baeldung.nashorn.controller;
+
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class MyRestController {
+
+    @RequestMapping("/next/{last}/{secondLast}")
+    public int index(@PathVariable("last") int last, @PathVariable("secondLast") int secondLast) throws Exception {
+        return last + secondLast;
+    }
+}

spring-boot-nashorn/src/main/java/com/baeldung/nashorn/controller/MyWebController.java

@@ -0,0 +1,32 @@
+package com.baeldung.nashorn.controller;
+
+import java.io.InputStreamReader;
+import java.util.Map;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+public class MyWebController {
+
+    @RequestMapping("/")
+    public String index(Map<String, Object> model) throws Exception {
+
+        ScriptEngine nashorn = new ScriptEngineManager().getEngineByName("nashorn");
+
+        getClass().getResource("classpath:storedProcedures.sql");
+
+        nashorn.eval(new InputStreamReader(new ClassPathResource("static/js/react.js").getInputStream()));
+        nashorn.eval(new InputStreamReader(new ClassPathResource("static/js/react-dom-server.js").getInputStream()));
+
+        nashorn.eval(new InputStreamReader(new ClassPathResource("static/app.js").getInputStream()));
+        Object html = nashorn.eval("ReactDOMServer.renderToString(" + "React.createElement(App, {data: [0,1,1]})" + ");");
+
+        model.put("content", String.valueOf(html));
+        return "index";
+    }
+}

spring-boot-nashorn/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+spring.mvc.view.prefix: /WEB-INF/jsp/
+spring.mvc.view.suffix: .jsp

spring-boot-nashorn/src/main/resources/static/app.js

@@ -0,0 +1,37 @@
+var App = React.createClass({displayName: "App",
+	
+    handleSubmit: function () {
+    	var last = this.state.data[this.state.data.length-1];
+    	var secondLast = this.state.data[this.state.data.length-2];
+        $.ajax({
+            url: '/next/'+last+'/'+secondLast,
+            dataType: 'text',
+            success: function (msg) {
+                var series = this.state.data;
+                series.push(msg);
+                this.setState({data: series});
+            }.bind(this),
+            error: function (xhr, status, err) {
+                console.error("/next", status, err.toString());
+            }.bind(this)
+        });
+    },
+    
+    componentDidMount: function() {
+    	this.setState({data: this.props.data});
+    },
+	
+    getInitialState: function () {
+        return {data: []};
+    },
+	
+    render: function () {
+        return (
+            React.createElement("div", {className: "app"},
+            	React.createElement("h2", null, "Fibonacci Generator"),
+            	React.createElement("h2", null, this.state.data.toString()),
+                React.createElement("input", {type: "submit", value: "Next", onClick: this.handleSubmit})
+            )     
+        );
+    }
+});

spring-boot-nashorn/src/main/resources/static/js/react-dom-server.js

@@ -0,0 +1,42 @@
+/**
+ * ReactDOMServer v0.14.3
+ *
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+// Based off https://github.com/ForbesLindesay/umd/blob/master/template.js
+;(function(f) {
+  // CommonJS
+  if (typeof exports === "object" && typeof module !== "undefined") {
+    module.exports = f(require('react'));
+
+  // RequireJS
+  } else if (typeof define === "function" && define.amd) {
+    define(['react'], f);
+
+  // <script>
+  } else {
+    var g
+    if (typeof window !== "undefined") {
+      g = window;
+    } else if (typeof global !== "undefined") {
+      g = global;
+    } else if (typeof self !== "undefined") {
+      g = self;
+    } else {
+      // works providing we're not in "use strict";
+      // needed for Java 8 Nashorn
+      // see https://github.com/facebook/react/issues/3037
+      g = this;
+    }
+    g.ReactDOMServer = f(g.React);
+  }
+
+})(function(React) {
+  return React.__SECRET_DOM_SERVER_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
+});

spring-boot-nashorn/src/main/resources/static/js/react-dom.js

@@ -0,0 +1,42 @@
+/**
+ * ReactDOM v0.14.3
+ *
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+// Based off https://github.com/ForbesLindesay/umd/blob/master/template.js
+;(function(f) {
+  // CommonJS
+  if (typeof exports === "object" && typeof module !== "undefined") {
+    module.exports = f(require('react'));
+
+  // RequireJS
+  } else if (typeof define === "function" && define.amd) {
+    define(['react'], f);
+
+  // <script>
+  } else {
+    var g
+    if (typeof window !== "undefined") {
+      g = window;
+    } else if (typeof global !== "undefined") {
+      g = global;
+    } else if (typeof self !== "undefined") {
+      g = self;
+    } else {
+      // works providing we're not in "use strict";
+      // needed for Java 8 Nashorn
+      // see https://github.com/facebook/react/issues/3037
+      g = this;
+    }
+    g.ReactDOM = f(g.React);
+  }
+
+})(function(React) {
+  return React.__SECRET_DOM_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
+});

spring-boot-nashorn/src/main/webapp/WEB-INF/jsp/index.jsp

@@ -0,0 +1,19 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Hello React!</title>
+    <script type="text/javascript" src="js/react.js"></script>
+    <script type="text/javascript" src="js/react-dom.js"></script>
+    <script type="text/javascript" src="http://code.jquery.com/jquery-1.10.0.min.js"></script>
+</head>
+<body>
+<div id="root">${content}</div>
+<script type="text/javascript" src="app.js"></script>
+<script type="text/javascript">
+	ReactDOM.render(
+        React.createElement(App, {data: [0,1,1]}),
+        document.getElementById("root")
+    );
+</script>
+</body>
+</html>