From 7bbfde57e16f7a3de1e7e59ca0ddbbb571b5c1ca Mon Sep 17 00:00:00 2001
From: tschiman <tschiman@gmail.com>
Date: Fri, 26 May 2017 18:04:48 -0600
Subject: [PATCH] BAEL-755 Kotlin and Spring Boot 2.x tutorial

---
 pom.xml                                       |   1 +
 spring-boot-kotlin/pom.xml                    | 137 ++++++++++++++++++
 .../springbootkotlin/HelloController.kt       |  24 +++
 .../baeldung/springbootkotlin/HelloPoko.kt    |   3 +
 .../baeldung/springbootkotlin/HelloService.kt |  10 ++
 .../springbootkotlin/KotlinDemoApplication.kt |  11 ++
 .../src/main/resource/application.properties  |   0
 .../KotlinDemoApplicationTests.kt             |  52 +++++++
 8 files changed, 238 insertions(+)
 create mode 100644 spring-boot-kotlin/pom.xml
 create mode 100644 spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloController.kt
 create mode 100644 spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloPoko.kt
 create mode 100644 spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloService.kt
 create mode 100644 spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/KotlinDemoApplication.kt
 create mode 100644 spring-boot-kotlin/src/main/resource/application.properties
 create mode 100644 spring-boot-kotlin/src/test/kotlin/springbootkotlin/KotlinDemoApplicationTests.kt

diff --git a/pom.xml b/pom.xml
index 3663d1308a..d54ac5a2b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -129,6 +129,7 @@
         <module>spring-apache-camel</module>
         <module>spring-batch</module>
         <module>spring-boot</module>
+        <module>spring-boot-kotlin</module>
         <module>spring-cloud-data-flow</module>
         <module>spring-cloud</module>
         <module>spring-core</module>
diff --git a/spring-boot-kotlin/pom.xml b/spring-boot-kotlin/pom.xml
new file mode 100644
index 0000000000..c882daa816
--- /dev/null
+++ b/spring-boot-kotlin/pom.xml
@@ -0,0 +1,137 @@
+<?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>org.springframework.boot</groupId>
+    <artifactId>spring-boot-starter-parent</artifactId>
+    <version>2.0.0.BUILD-SNAPSHOT</version>
+    <relativePath/> <!-- lookup parent from repository -->
+</parent>
+
+<artifactId>spring-boot-kotlin</artifactId>
+<version>1.0.0-SNAPSHOT</version>
+
+<properties>
+    <kotlin.compiler.incremental>true</kotlin.compiler.incremental>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    <java.version>1.8</java.version>
+    <kotlin.version>1.1.2</kotlin.version>
+</properties>
+
+<dependencies>
+    <dependency>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-web</artifactId>
+    </dependency>
+
+    <dependency>
+        <groupId>org.jetbrains.kotlin</groupId>
+        <artifactId>kotlin-stdlib-jre8</artifactId>
+        <version>${kotlin.version}</version>
+    </dependency>
+    <dependency>
+        <groupId>org.jetbrains.kotlin</groupId>
+        <artifactId>kotlin-reflect</artifactId>
+        <version>${kotlin.version}</version>
+    </dependency>
+    <dependency>
+        <groupId>com.fasterxml.jackson.module</groupId>
+        <artifactId>jackson-module-kotlin</artifactId>
+        <version>2.8.7</version>
+    </dependency>
+
+    <dependency>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-test</artifactId>
+        <scope>test</scope>
+    </dependency>
+</dependencies>
+
+<build>
+    <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
+    <testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
+    <plugins>
+        <plugin>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-maven-plugin</artifactId>
+        </plugin>
+        <plugin>
+            <artifactId>kotlin-maven-plugin</artifactId>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <version>${kotlin.version}</version>
+            <configuration>
+                <compilerPlugins>
+                    <plugin>spring</plugin>
+                </compilerPlugins>
+                <jvmTarget>1.8</jvmTarget>
+            </configuration>
+            <executions>
+                <execution>
+                    <id>compile</id>
+                    <phase>compile</phase>
+                    <goals>
+                        <goal>compile</goal>
+                    </goals>
+                </execution>
+                <execution>
+                    <id>test-compile</id>
+                    <phase>test-compile</phase>
+                    <goals>
+                        <goal>test-compile</goal>
+                    </goals>
+                </execution>
+            </executions>
+            <dependencies>
+                <dependency>
+                    <groupId>org.jetbrains.kotlin</groupId>
+                    <artifactId>kotlin-maven-allopen</artifactId>
+                    <version>${kotlin.version}</version>
+                </dependency>
+            </dependencies>
+        </plugin>
+    </plugins>
+</build>
+
+<repositories>
+    <repository>
+        <id>spring-snapshots</id>
+        <name>Spring Snapshots</name>
+        <url>https://repo.spring.io/snapshot</url>
+        <snapshots>
+            <enabled>true</enabled>
+        </snapshots>
+    </repository>
+    <repository>
+        <id>spring-milestones</id>
+        <name>Spring Milestones</name>
+        <url>https://repo.spring.io/milestone</url>
+        <snapshots>
+            <enabled>false</enabled>
+        </snapshots>
+    </repository>
+</repositories>
+
+<pluginRepositories>
+    <pluginRepository>
+        <id>spring-snapshots</id>
+        <name>Spring Snapshots</name>
+        <url>https://repo.spring.io/snapshot</url>
+        <snapshots>
+            <enabled>true</enabled>
+        </snapshots>
+    </pluginRepository>
+    <pluginRepository>
+        <id>spring-milestones</id>
+        <name>Spring Milestones</name>
+        <url>https://repo.spring.io/milestone</url>
+        <snapshots>
+            <enabled>false</enabled>
+        </snapshots>
+    </pluginRepository>
+</pluginRepositories>
+    
+</project>
\ No newline at end of file
diff --git a/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloController.kt b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloController.kt
new file mode 100644
index 0000000000..622271211b
--- /dev/null
+++ b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloController.kt
@@ -0,0 +1,24 @@
+package com.baeldung.springbootkotlin
+
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+class HelloController @Autowired constructor(val helloService: HelloService) {
+
+    @GetMapping("/hello")
+    fun helloKotlin(): String {
+        return "hello world"
+    }
+
+    @GetMapping("/hello-service")
+    fun helloKotlinService(): String {
+        return helloService.getHello()
+    }
+
+    @GetMapping("/hello-poko")
+    fun helloPoko(): HelloPoko {
+        return HelloPoko("Hello from the poko")
+    }
+}
\ No newline at end of file
diff --git a/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloPoko.kt b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloPoko.kt
new file mode 100644
index 0000000000..7e9c50e073
--- /dev/null
+++ b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloPoko.kt
@@ -0,0 +1,3 @@
+package com.baeldung.springbootkotlin
+
+data class HelloPoko constructor(val greeting: String)
diff --git a/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloService.kt b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloService.kt
new file mode 100644
index 0000000000..c988b64e05
--- /dev/null
+++ b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/HelloService.kt
@@ -0,0 +1,10 @@
+package com.baeldung.springbootkotlin
+
+import org.springframework.stereotype.Service
+
+@Service
+class HelloService {
+    fun getHello(): String {
+        return "hello service"
+    }
+}
\ No newline at end of file
diff --git a/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/KotlinDemoApplication.kt b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/KotlinDemoApplication.kt
new file mode 100644
index 0000000000..dbe5694b6d
--- /dev/null
+++ b/spring-boot-kotlin/src/main/kotlin/com/baeldung/springbootkotlin/KotlinDemoApplication.kt
@@ -0,0 +1,11 @@
+package com.baeldung.springbootkotlin
+
+import org.springframework.boot.SpringApplication
+import org.springframework.boot.autoconfigure.SpringBootApplication
+
+@SpringBootApplication
+class KotlinDemoApplication
+
+fun main(args: Array<String>) {
+    SpringApplication.run(KotlinDemoApplication::class.java, *args)
+}
diff --git a/spring-boot-kotlin/src/main/resource/application.properties b/spring-boot-kotlin/src/main/resource/application.properties
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spring-boot-kotlin/src/test/kotlin/springbootkotlin/KotlinDemoApplicationTests.kt b/spring-boot-kotlin/src/test/kotlin/springbootkotlin/KotlinDemoApplicationTests.kt
new file mode 100644
index 0000000000..c6d9146edd
--- /dev/null
+++ b/spring-boot-kotlin/src/test/kotlin/springbootkotlin/KotlinDemoApplicationTests.kt
@@ -0,0 +1,52 @@
+package com.example.kotlindemo
+
+import com.baeldung.springbootkotlin.HelloPoko
+import com.baeldung.springbootkotlin.KotlinDemoApplication
+import org.junit.Assert
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.boot.test.web.client.TestRestTemplate
+import org.springframework.http.HttpStatus
+import org.springframework.test.context.junit4.SpringRunner
+
+@RunWith(SpringRunner::class)
+@SpringBootTest(classes = arrayOf(KotlinDemoApplication::class), webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+class KotlinDemoApplicationTests {
+
+	@Autowired
+	val testRestTemplate: TestRestTemplate? = null
+
+	@Test
+	fun contextLoads() {
+	}
+
+	@Test
+	fun testHelloController() {
+		var result = testRestTemplate?.getForEntity("/hello", String::class.java)
+
+		Assert.assertNotNull(result)
+		Assert.assertEquals(result?.statusCode, HttpStatus.OK)
+		Assert.assertEquals(result?.body, "hello world")
+	}
+
+	@Test
+	fun testHelloService() {
+		var result = testRestTemplate?.getForEntity("/hello-service", String::class.java)
+
+		Assert.assertNotNull(result)
+		Assert.assertEquals(result?.statusCode, HttpStatus.OK)
+		Assert.assertEquals(result?.body, "hello service")
+	}
+
+	@Test
+	fun testHelloPoko() {
+		var result = testRestTemplate?.getForEntity("/hello-poko", HelloPoko::class.java)
+
+		Assert.assertNotNull(result)
+		Assert.assertEquals(result?.statusCode, HttpStatus.OK)
+		Assert.assertEquals(result?.body, HelloPoko("Hello from the poko"))
+	}
+
+}