Merge pull request #1981 from eugenp/spring-boot-kotlin

BAEL-755 - moving kotlin code to spring-5-mvc

spring-5-mvc/pom.xml

@@ -15,7 +15,8 @@
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
         <version>2.0.0.M1</version>
-        <relativePath /> <!-- lookup parent from repository -->
+        <relativePath/>
+        <!-- lookup parent from repository -->
     </parent>
 
     <dependencies>
@@ -51,6 +52,23 @@
             <artifactId>jcl-over-slf4j</artifactId>
         </dependency>
 
+        <!--kotlin deps-->
+        <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>
+
         <!-- runtime and test scoped -->
 
         <dependency>
@@ -90,7 +108,47 @@
     </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>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
@@ -149,6 +207,7 @@
         <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>
 
 </project>

spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/HelloController.kt

@@ -0,0 +1,23 @@
+package com.baeldung.springbootkotlin
+
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+class HelloController(val helloService: HelloService) {
+
+    @GetMapping("/hello")
+    fun helloKotlin(): String {
+        return "hello world"
+    }
+
+    @GetMapping("/hello-service")
+    fun helloKotlinService(): String {
+        return helloService.getHello()
+    }
+
+    @GetMapping("/hello-dto")
+    fun helloDto(): HelloDto {
+        return HelloDto("Hello from the dto")
+    }
+}

spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/HelloDto.kt

@@ -0,0 +1,3 @@
+package com.baeldung.springbootkotlin
+
+data class HelloDto(val greeting: String)

spring-5-mvc/src/main/kotlin/com/baeldung/springbootkotlin/HelloService.kt

@@ -0,0 +1,11 @@
+package com.baeldung.springbootkotlin
+
+import org.springframework.stereotype.Service
+
+@Service
+class HelloService {
+
+    fun getHello(): String {
+        return "hello service"
+    }
+}

spring-5-mvc/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)
+}

spring-5-mvc/src/test/kotlin/springbootkotlin/KotlinDemoApplicationIntegrationTest.kt

@@ -0,0 +1,53 @@
+package springbootkotlin
+
+import com.baeldung.springbootkotlin.HelloDto
+import com.baeldung.springbootkotlin.KotlinDemoApplication
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+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 KotlinDemoApplicationIntegrationTest {
+
+	@Autowired
+	val testRestTemplate: TestRestTemplate? = null
+
+	@Test
+	fun contextLoads() {
+	}
+
+	@Test
+	fun testHelloController() {
+		val result = testRestTemplate?.getForEntity("/hello", String::class.java)
+
+		assertNotNull(result)
+		assertEquals(result?.statusCode, HttpStatus.OK)
+		assertEquals(result?.body, "hello world")
+	}
+
+	@Test
+	fun testHelloService() {
+		val result = testRestTemplate?.getForEntity("/hello-service", String::class.java)
+
+		assertNotNull(result)
+		assertEquals(result?.statusCode, HttpStatus.OK)
+		assertEquals(result?.body, "hello service")
+	}
+
+	@Test
+	fun testHelloDto() {
+		val result = testRestTemplate?.getForEntity("/hello-dto", HelloDto::class.java)
+
+		assertNotNull(result)
+		assertEquals(result?.statusCode, HttpStatus.OK)
+		assertEquals(result?.body, HelloDto("Hello from the dto"))
+	}
+
+}