first rest service

src/.gitignore

@@ -3,3 +3,7 @@
 # run "dep ensure --vendor-only" to download the dependencies to vendor/ based
 # on the Gopkg.{toml,lock} files in that directory.
 vendor/
+tamagotchi-service/target
+tamagotchi-service/.idea
+*.iml
+

src/tamagotchi-service/app.yaml

@@ -0,0 +1,2 @@
+runtime: java11
+entrypoint: java -jar target/tamagotchi-service-0.1.0.jar

src/tamagotchi-service/pom.xml

@@ -0,0 +1,53 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.sap</groupId>
+    <artifactId>tamagotchi-service</artifactId>
+    <version>0.1.0</version>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.6.RELEASE</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.jayway.jsonpath</groupId>
+            <artifactId>json-path</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>com.google.appengine</groupId>
+                <artifactId>appengine-maven-plugin</artifactId>
+                <version>1.9.77</version>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/tamagotchi-service/src/main/java/hello/Application.java

@@ -0,0 +1,11 @@
+package hello;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

src/tamagotchi-service/src/main/java/hello/Greeting.java

@@ -0,0 +1,20 @@
+package hello;
+
+public class Greeting {
+
+    private final long id;
+    private final String content;
+
+    public Greeting(long id, String content) {
+        this.id = id;
+        this.content = content;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getContent() {
+        return content;
+    }
+}

src/tamagotchi-service/src/main/java/hello/GreetingController.java

@@ -0,0 +1,19 @@
+package hello;
+
+import java.util.concurrent.atomic.AtomicLong;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class GreetingController {
+
+    private static final String template = "Hello, %s!";
+    private final AtomicLong counter = new AtomicLong();
+
+    @RequestMapping("/greeting")
+    public Greeting greeting(@RequestParam(value="name", defaultValue="World") String name) {
+        return new Greeting(counter.incrementAndGet(),
+                            String.format(template, name));
+    }
+}

src/tamagotchi-service/src/test/java/hello/GreetingControllerTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2016 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 hello;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+public class GreetingControllerTests {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void noParamGreetingShouldReturnDefaultMessage() throws Exception {
+
+        this.mockMvc.perform(get("/greeting")).andDo(print()).andExpect(status().isOk())
+                .andExpect(jsonPath("$.content").value("Hello, World!"));
+    }
+
+    @Test
+    public void paramGreetingShouldReturnTailoredMessage() throws Exception {
+
+        this.mockMvc.perform(get("/greeting").param("name", "Spring Community"))
+                .andDo(print()).andExpect(status().isOk())
+                .andExpect(jsonPath("$.content").value("Hello, Spring Community!"));
+    }
+
+}