Kotlin and Groovy versions of Micronaut Dependency Injection types (#…

…1227)

Close #1082

guides/micronaut-dependency-injection-types/groovy/src/main/groovy/example/micronaut/MessageService.groovy

@@ -0,0 +1,13 @@
+package example.micronaut
+
+import io.micronaut.core.annotation.NonNull
+import jakarta.inject.Singleton
+
+@Singleton
+class MessageService {
+
+    @NonNull
+    String compose() {
+        "Hello World"
+    }
+}

guides/micronaut-dependency-injection-types/groovy/src/main/groovy/example/micronaut/constructor/MessageController.groovy

@@ -0,0 +1,22 @@
+package example.micronaut.constructor
+
+import example.micronaut.MessageService
+import io.micronaut.http.MediaType
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Get
+import io.micronaut.http.annotation.Produces
+
+@Controller("/constructor")
+class MessageController {
+    private final MessageService messageService
+
+    MessageController(MessageService messageService) {
+        this.messageService = messageService
+    }
+
+    @Get
+    @Produces(MediaType.TEXT_PLAIN)
+    String index() {
+        messageService.compose()
+    }
+}

guides/micronaut-dependency-injection-types/groovy/src/main/groovy/example/micronaut/field/MessageController.groovy

@@ -0,0 +1,20 @@
+package example.micronaut.field
+
+import example.micronaut.MessageService
+import io.micronaut.http.MediaType
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Get
+import io.micronaut.http.annotation.Produces
+import jakarta.inject.Inject
+
+@Controller("/field")
+class MessageController {
+    @Inject
+    MessageService messageService
+
+    @Get
+    @Produces(MediaType.TEXT_PLAIN)
+    String index() {
+        messageService.compose()
+    }
+}

guides/micronaut-dependency-injection-types/groovy/src/main/groovy/example/micronaut/methodparameter/MessageController.groovy

@@ -0,0 +1,24 @@
+package example.micronaut.methodparameter
+
+import example.micronaut.MessageService
+import io.micronaut.http.MediaType
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Get
+import io.micronaut.http.annotation.Produces
+import jakarta.inject.Inject
+
+@Controller("/setter")
+class MessageController {
+    private MessageService messageService
+
+    @Get
+    @Produces(MediaType.TEXT_PLAIN)
+    String index() {
+        return messageService.compose()
+    }
+
+    @Inject
+    void populateMessageService(MessageService messageService) {
+        this.messageService = messageService
+    }
+}

guides/micronaut-dependency-injection-types/groovy/src/test/java/example/micronaut/MessageControllerSpec.groovy

@@ -0,0 +1,27 @@
+package example.micronaut
+
+import io.micronaut.http.HttpRequest
+import io.micronaut.http.MediaType
+import io.micronaut.http.client.HttpClient
+import io.micronaut.http.client.annotation.Client
+import io.micronaut.test.extensions.junit5.annotation.MicronautTest
+import jakarta.inject.Inject
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.ValueSource
+
+import static org.junit.jupiter.api.Assertions.assertEquals
+
+@MicronautTest
+class MessageControllerTest {
+    @Inject
+    @Client("/")
+    HttpClient httpClient
+
+    @ParameterizedTest
+    @ValueSource(strings = ["/constructor", "/field", "/setter"])
+    void validateMessageControllers(String path) {
+        assertEquals("Hello World", httpClient.toBlocking().retrieve(
+                HttpRequest.GET(path).accept(MediaType.TEXT_PLAIN))
+        )
+    }
+}

guides/micronaut-dependency-injection-types/kotlin/src/main/kotlin/example/micronaut/MessageService.kt

@@ -0,0 +1,10 @@
+package example.micronaut
+
+import io.micronaut.core.annotation.NonNull
+import jakarta.inject.Singleton
+
+@Singleton
+class MessageService {
+    @NonNull
+    fun compose() = "Hello World"
+}

guides/micronaut-dependency-injection-types/kotlin/src/main/kotlin/example/micronaut/constructor/MessageController.kt

@@ -0,0 +1,14 @@
+package example.micronaut.constructor
+
+import example.micronaut.MessageService
+import io.micronaut.http.MediaType
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Get
+import io.micronaut.http.annotation.Produces
+
+@Controller("/constructor")
+class MessageController(val messageService: MessageService) {
+    @Get
+    @Produces(MediaType.TEXT_PLAIN)
+    fun index() = messageService.compose()
+}

guides/micronaut-dependency-injection-types/kotlin/src/main/kotlin/example/micronaut/field/MessageController.kt

@@ -0,0 +1,18 @@
+package example.micronaut.field
+
+import example.micronaut.MessageService
+import io.micronaut.http.MediaType
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Get
+import io.micronaut.http.annotation.Produces
+import jakarta.inject.Inject
+
+@Controller("/field")
+class MessageController {
+    @Inject
+    lateinit var messageService: MessageService
+
+    @Get
+    @Produces(MediaType.TEXT_PLAIN)
+    fun index() = messageService.compose()
+}

guides/micronaut-dependency-injection-types/kotlin/src/main/kotlin/example/micronaut/methodparameter/MessageController.kt

@@ -0,0 +1,22 @@
+package example.micronaut.methodparameter
+
+import example.micronaut.MessageService
+import io.micronaut.http.MediaType
+import io.micronaut.http.annotation.Controller
+import io.micronaut.http.annotation.Get
+import io.micronaut.http.annotation.Produces
+import jakarta.inject.Inject
+
+@Controller("/setter")
+class MessageController {
+    var messageService: MessageService? = null
+
+    @Get
+    @Produces(MediaType.TEXT_PLAIN)
+    fun index() = messageService?.compose()
+
+    @Inject
+    fun populateMessageService(messageService: MessageService) {
+        this.messageService = messageService
+    }
+}

guides/micronaut-dependency-injection-types/kotlin/src/test/kotlin/example/micronaut/MessageControllerTest.kt

@@ -0,0 +1,25 @@
+package example.micronaut
+
+import io.micronaut.http.HttpRequest
+import io.micronaut.http.MediaType
+import io.micronaut.http.client.HttpClient
+import io.micronaut.http.client.annotation.Client
+import io.micronaut.test.extensions.junit5.annotation.MicronautTest
+import jakarta.inject.Inject
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.ValueSource
+
+@MicronautTest
+class MessageControllerTest {
+    @Inject
+    @field:Client("/")
+    lateinit var httpClient: HttpClient
+
+    @ParameterizedTest
+    @ValueSource(strings = ["/constructor", "/field", "/setter"])
+    fun validateMessageControllers(path: String) {
+        val request = HttpRequest.GET<String>(path).accept(MediaType.TEXT_PLAIN)
+        assertEquals("Hello World", httpClient.toBlocking().retrieve(request))
+    }
+}

guides/micronaut-dependency-injection-types/metadata.json

@@ -5,7 +5,7 @@
   "tags": ["junit","di"],
   "categories": ["Getting Started"],
   "publicationDate": "2022-09-09",
-  "languages": ["java"],
+  "testFramework": "junit",
   "apps": [
     {
       "name": "default",