Add all layers implementation.

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

@@ -1,8 +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 {
-
+class ProductUseCases(
+    private val productPort: ProductPort
+) {
+    fun getAll(): List<Product> = productPort.getAll()
 }

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

@@ -7,6 +7,10 @@ plugins {
 
 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")
 }
 

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

@@ -1,9 +1,18 @@
 package com.example.demo.launcher
 
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
 
-@SpringBootApplication
+@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>) {

settings.gradle.kts

@@ -1,4 +1,6 @@
 rootProject.name = "demo"
 include(":demo-domain")
 include(":demo-application")
+include(":demo-infrastructure")
+include(":demo-exposition")
 include(":demo-launcher")