Add all layers implementation.

build.gradle.kts

@@ -1,7 +1,13 @@
+object Versions {
+	const val springBoot = "3.4.3"
+	const val springDependencyManagement = "1.1.7"
+	const val kotlinJvm = "1.9.25"
+	const val kotlinPluginSpring = "1.9.25"
+}
+
 plugins {
 	kotlin("jvm") version "1.9.25"
 	kotlin("plugin.spring") version "1.9.25"
-	id("org.springframework.boot") version "3.4.4"
 	id("io.spring.dependency-management") version "1.1.7"
 }
 
@@ -18,13 +24,24 @@ repositories {
 	mavenCentral()
 }
 
-dependencies {
-	implementation("org.springframework.boot:spring-boot-starter-web")
-	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
-	implementation("org.jetbrains.kotlin:kotlin-reflect")
-	testImplementation("org.springframework.boot:spring-boot-starter-test")
-	testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
-	testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+subprojects {
+	apply(plugin = "java")
+	apply(plugin = "org.jetbrains.kotlin.jvm")
+
+	repositories {
+		mavenCentral()
+	}
+
+	dependencies {
+		implementation(platform("org.springframework.boot:spring-boot-dependencies:${Versions.springBoot}"))
+	}
+
+}
+
+dependencyManagement {
+	imports {
+		mavenBom("org.springframework.boot:spring-boot-dependencies:${Versions.springBoot}")
+	}
 }
 
 kotlin {

demo-application/build.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    kotlin("jvm")
+    id("io.spring.dependency-management") version "1.1.7"
+    id("java")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(project(":demo-domain"))
+    implementation("org.springframework:spring-context")
+}

demo-application/src/main/kotlin/com/example/demo/application/product/ProductUseCases.kt

@@ -0,0 +1,12 @@
+package com.example.demo.application.product
+
+import com.example.demo.domain.product.model.Product
+import com.example.demo.domain.product.port.ProductPort
+import org.springframework.stereotype.Service
+
+@Service
+class ProductUseCases(
+    private val productPort: ProductPort
+) {
+    fun getAll(): List<Product> = productPort.getAll()
+}

demo-domain/build.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+    kotlin("jvm")
+    id("java")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+}

demo-domain/src/main/kotlin/com/example/demo/domain/product/model/Product.kt

@@ -0,0 +1,9 @@
+package com.example.demo.domain.product.model
+
+import java.util.UUID
+
+data class Product(
+    val id: UUID,
+    val name: String,
+    val type: ProductType
+)

demo-domain/src/main/kotlin/com/example/demo/domain/product/model/ProductType.kt

@@ -0,0 +1,7 @@
+package com.example.demo.domain.product.model
+
+enum class ProductType {
+    SOLID,
+    LIQUID,
+    GAS
+}

demo-domain/src/main/kotlin/com/example/demo/domain/product/port/ProductPort.kt

@@ -0,0 +1,14 @@
+package com.example.demo.domain.product.port
+
+import com.example.demo.domain.product.model.Product
+import java.util.UUID
+
+interface ProductPort {
+    fun getById(id: UUID): Product?
+
+    fun getAll(): List<Product>
+
+    fun save(product: Product)
+
+    fun deleteById(id: UUID)
+}

demo-exposition/build.gradle.kts

@@ -0,0 +1,13 @@
+plugins {
+    kotlin("jvm")
+    id("io.spring.dependency-management") version "1.1.7"
+    id("java")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(project(":demo-application"))
+    implementation(project(":demo-domain"))
+    implementation("org.springframework:spring-context")
+    implementation("org.springframework:spring-web")
+}

demo-exposition/src/main/kotlin/com/example/demo/exposition/product/ProductController.kt

@@ -0,0 +1,16 @@
+package com.example.demo.exposition.product
+
+import com.example.demo.application.product.ProductUseCases
+import com.example.demo.exposition.product.model.ProductDto
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/api/products")
+class ProductController(
+    private val productUseCases: ProductUseCases
+) {
+    @GetMapping
+    fun getAll(): List<ProductDto> = productUseCases.getAll().map(::ProductDto)
+}

demo-exposition/src/main/kotlin/com/example/demo/exposition/product/model/ProductDto.kt

@@ -0,0 +1,22 @@
+package com.example.demo.exposition.product.model
+
+import com.example.demo.domain.product.model.Product
+import java.util.*
+
+data class ProductDto(
+    val id: UUID,
+    val name: String,
+    val type: ProductTypeDto
+) {
+    constructor(product: Product): this(
+        id = product.id,
+        name = product.name,
+        type = ProductTypeDto.fromDomain(product.type)
+    )
+
+    fun toDomain() = Product(
+        id,
+        name,
+        type = type.toDomain()
+    )
+}

demo-exposition/src/main/kotlin/com/example/demo/exposition/product/model/ProductTypeDto.kt

@@ -0,0 +1,25 @@
+package com.example.demo.exposition.product.model
+
+import com.example.demo.domain.product.model.ProductType
+
+enum class ProductTypeDto {
+    SOLID,
+    LIQUID,
+    GAS;
+
+    fun toDomain(): ProductType {
+        return when (this) {
+            SOLID -> ProductType.SOLID
+            LIQUID -> ProductType.LIQUID
+            GAS -> ProductType.GAS
+        }
+    }
+
+    companion object {
+        fun fromDomain(productType: ProductType) = when (productType) {
+            ProductType.SOLID -> SOLID
+            ProductType.LIQUID -> LIQUID
+            ProductType.GAS -> GAS
+        }
+    }
+}

demo-infrastructure/build.gradle.kts

@@ -0,0 +1,12 @@
+plugins {
+    kotlin("jvm")
+    id("io.spring.dependency-management") version "1.1.7"
+    id("java")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(project(":demo-application"))
+    implementation(project(":demo-domain"))
+    implementation("org.springframework:spring-context")
+}

demo-infrastructure/src/main/kotlin/com/example/demo/infrastructure/product/ProductInMemoryAdapter.kt

@@ -0,0 +1,41 @@
+package com.example.demo.infrastructure.product
+
+import com.example.demo.domain.product.model.Product
+import com.example.demo.domain.product.model.ProductType.LIQUID
+import com.example.demo.domain.product.model.ProductType.SOLID
+import com.example.demo.domain.product.port.ProductPort
+import org.springframework.stereotype.Component
+import java.util.*
+
+@Component
+class ProductInMemoryAdapter : ProductPort {
+    private val products = mutableListOf<Product>(
+        Product(
+            id = UUID.randomUUID(),
+            name = "Banana x5",
+            type = SOLID
+        ),
+        Product(
+            id = UUID.randomUUID(),
+            name = "Banana juice 1L",
+            type = LIQUID
+        )
+    )
+
+    override fun getById(id: UUID): Product? = products.find { product -> product.id == id }
+
+    override fun getAll(): List<Product> = products
+
+    override fun save(product: Product) {
+        if (getById(product.id) == null) {
+            products.add(product)
+        } else {
+            deleteById(product.id)
+            save(product)
+        }
+    }
+
+    override fun deleteById(id: UUID) {
+        products.removeIf { product -> product.id == id }
+    }
+}

demo-launcher/build.gradle.kts

@@ -1,19 +1,19 @@
 plugins {
     kotlin("jvm")
-    id("org.springframework.boot")
-    id("io.spring.dependency-management")
+    id("org.springframework.boot") version "3.4.3"
+    id("io.spring.dependency-management") version "1.1.7"
     id("java")
 }
 
-repositories {
-    mavenCentral()
-}
-
 dependencies {
     implementation(kotlin("stdlib"))
+    implementation(project(":demo-domain"))
+    implementation(project(":demo-application"))
+    implementation(project(":demo-infrastructure"))
+    implementation(project(":demo-exposition"))
     implementation("org.springframework.boot:spring-boot-starter-web")
 }
 
 springBoot {
-    mainClass = "com.example.demo.launcher.ApplicationLauncher"
+    mainClass = "com.example.demo.launcher.ApplicationLauncherKt"
 }

demo-launcher/src/main/kotlin/com/example/demo/launcher/ApplicationLauncher.kt

@@ -1,11 +1,20 @@
 package com.example.demo.launcher
 
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
 
-@SpringBootApplication
-class DemoApplication
+@SpringBootApplication(
+    scanBasePackages = [
+        "com.example.demo.domain",
+        "com.example.demo.application",
+        "com.example.demo.infrastructure",
+        "com.example.demo.exposition"
+    ]
+)
+@EnableAutoConfiguration
+open class DemoApplication
 
 fun main(args: Array<String>) {
     runApplication<DemoApplication>(*args)
-}
+}

settings.gradle.kts

@@ -1,2 +1,6 @@
 rootProject.name = "demo"
-include(":demo-launcher")
+include(":demo-domain")
+include(":demo-application")
+include(":demo-infrastructure")
+include(":demo-exposition")
+include(":demo-launcher")

src/main/kotlin/com/example/demo/DemoApplication.kt

@@ -1,11 +0,0 @@
-package com.example.demo
-
-import org.springframework.boot.autoconfigure.SpringBootApplication
-import org.springframework.boot.runApplication
-
-@SpringBootApplication
-class DemoApplication
-
-fun main(args: Array<String>) {
-	runApplication<DemoApplication>(*args)
-}

src/main/resources/application.properties

@@ -1 +0,0 @@
-spring.application.name=demo

src/test/kotlin/com/example/demo/DemoApplicationTests.kt

@@ -1,13 +0,0 @@
-package com.example.demo
-
-import org.junit.jupiter.api.Test
-import org.springframework.boot.test.context.SpringBootTest
-
-@SpringBootTest
-class DemoApplicationTests {
-
-	@Test
-	fun contextLoads() {
-	}
-
-}