First sample

README.md

+# Summary
+
+This simple example lets you run a http server with Spring boot.
+
+Here are good resources who inspired this current snippet :
+
+- https://spring.io/guides/gs/rest-service/
+- https://www.baeldung.com/spring-controller-vs-restcontroller
+
+## How to
+
+Build and run :
+
+```
+mvn clean package
+mvn spring-boot:run
+```
+
+Open a browser at : localhost:8080/toto
+
+result:
+
+```
+{
+  "owner": "Marcus Miller",
+  "id": 2,
+  "xs": [
+    "Houhou",
+    "Haha"
+  ]
+}
+```

pom.xml

+<?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>ch.hepia</groupId>
+    <artifactId>http-server-example</artifactId>
+    <version>0.1.0</version>
+
+<!--
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.5.RELEASE</version>
+    </parent>
+    -->
+
+    <dependencies>
+    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
+       <dependency>
+           <groupId>org.springframework.boot</groupId>
+           <artifactId>spring-boot-starter-web</artifactId>
+           <version>2.1.1.RELEASE</version>
+       </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <version>2.1.1.RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.jayway.jsonpath</groupId>
+            <artifactId>json-path</artifactId>
+            <version>2.4.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+<properties>
+    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>11</maven.compiler.target>
+</properties>
+
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>2.0.1.RELEASE</version>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/ch/hepia/App.java

+package ch.hepia;
+
+import java.util.List;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/*
+ * DTO for Data Transrer Object
+ * This is not a Domain Object, just a reprensentation of something transferable.
+ * json-marshaller convert automatically to JSON. All getters will be translate 
+ * to a JSON field
+ * 
+ * Don't use DTO for your business model
+ */
+class DtoToto {
+    private final int i;
+    private final String owner;
+    public DtoToto(int i, String owner) {
+        this.i = i;
+        this.owner = owner;
+    }
+    public int getId(){ return this.i; }
+    public String getOwner(){ return this.owner; }
+    public List<String> getXs() { return List.of("Houhou", "Haha"); }
+}
+
+@SpringBootApplication
+@RestController
+public class App {
+
+    @RequestMapping("/toto")
+    public DtoToto greeting(@RequestParam(value="name", defaultValue="World") String name) {
+        return new DtoToto(2, "Marcus Miller");
+    }
+    public static void main(String[] args) {
+        SpringApplication.run(App.class, args);
+    }
+}
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