Add service sample

Closes gh-844

initializr-service-sample/README.adoc

@@ -0,0 +1,50 @@
+= Service sample
+
+:docs: http://docs.spring.io/initializr/docs/current-SNAPSHOT/reference/html
+
+This sample demonstrates how you can create your own service easily as described in the
+{docs}/#create-instance[reference documentation].
+
+== Running the service
+You can start the service from the command line:
+
+[indent=0]
+----
+    $ ./mvnw spring-boot:run
+----
+
+Or, better yet, run the `ServiceApplication` main method from your favourite IDE.
+
+== Generating a project
+If you go to `localhost:8080` with your browser, you'll get a json document that describes
+the capabilities of the service. There are several ways you can generate a project.
+
+If you have `HTTPie` installed, try the following:
+
+[indent=0]
+----
+    $ http :8080
+----
+
+If you prefer to use `cURL`, try this instead:
+
+[indent=0]
+----
+    $ curl localhost:8080
+----
+
+If you have the `spring` CLI installed, you can also use it as follows:
+
+[indent=0]
+----
+    $ spring init --target http://localhost:8080 --list
+----
+
+Finally, you can configure your IDE to point to another service instance.
+
+== Configuration
+The configuration in `application.yml` is very simple with a single `web` dependency that
+brings `spring-boot-starter-web`. You can experiment by adding more dependencies or other
+elements that drive how projects are generated.
+
+

initializr-service-sample/pom.xml

@@ -0,0 +1,41 @@
+<?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>
+		<groupId>io.spring.initializr</groupId>
+		<artifactId>initializr</artifactId>
+		<version>${revision}</version>
+	</parent>
+	<artifactId>initializr-service-sample</artifactId>
+	<name>Spring Initializr :: Service (Sample)</name>
+
+	<properties>
+		<main.basedir>${basedir}/..</main.basedir>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>io.spring.initializr</groupId>
+			<artifactId>initializr-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>io.spring.initializr</groupId>
+			<artifactId>initializr-generator-spring</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<optional>true</optional>
+		</dependency>
+
+	</dependencies>
+
+</project>

initializr-service-sample/src/main/java/sample/service/ServiceApplication.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2012-2019 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
+ *
+ *      https://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.service;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+/**
+ * Sample service application.
+ *
+ * @author Stephane Nicoll
+ */
+@SpringBootApplication
+@EnableCaching
+@EnableAsync
+public class ServiceApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ServiceApplication.class, args);
+	}
+
+}

initializr-service-sample/src/main/resources/application.yml

@@ -0,0 +1,49 @@
+initializr:
+  dependencies:
+    - name: Web
+      content:
+        - name: Web
+          id: web
+          description: Servlet web application with Spring MVC and Tomcat
+  types:
+    - name: Maven Project
+      id: maven-project
+      description: Generate a Maven based project archive
+      tags:
+        build: maven
+        format: project
+      default: true
+      action: /starter.zip
+    - name: Gradle Project
+      id: gradle-project
+      description: Generate a Gradle based project archive
+      tags:
+        build: gradle
+        format: project
+      default: false
+      action: /starter.zip
+  packagings:
+    - name: Jar
+      id: jar
+      default: true
+    - name: War
+      id: war
+      default: false
+  javaVersions:
+    - id: 11
+      default: false
+    - id: 1.8
+      name: 8
+      default: true
+  languages:
+    - name: Java
+      id: java
+      default: true
+    - name: Kotlin
+      id: kotlin
+      default: false
+    - name: Groovy
+      id: groovy
+      default: false
+  group-id:
+    value: org.acme