some refactoring

src/main/kotlin/com/example/demo/config/AppConfig.kt

@@ -1,13 +1,13 @@
 package com.example.demo.config
 
-import com.example.demo.provider.CityRepository
-import com.example.demo.provider.MockedShopProvider
-import com.example.demo.provider.ProductRepository
-import com.example.demo.provider.ShopProvider
-import com.example.demo.services.CityService
-import com.example.demo.services.CityServiceImpl
-import com.example.demo.services.ProductService
-import com.example.demo.services.ProductServiceImpl
+import com.example.demo.providers.CityRepository
+import com.example.demo.providers.MockedShopProvider
+import com.example.demo.providers.ProductRepository
+import com.example.demo.providers.ShopProvider
+import com.example.demo.services.database.city.CityService
+import com.example.demo.services.database.city.CityServiceImpl
+import com.example.demo.services.database.product.ProductService
+import com.example.demo.services.database.product.ProductServiceImpl
 import com.example.demo.services.kafka.Producer
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.beans.factory.annotation.Value

src/main/kotlin/com/example/demo/http/controllers/GreetingController.kt

@@ -1,6 +1,6 @@
 package com.example.demo.http.controllers
 
-import com.example.demo.provider.html.renderProductTable
+import com.example.demo.providers.html.renderProductTable
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.ResponseBody
 import org.springframework.web.bind.annotation.RestController

src/main/kotlin/com/example/demo/http/controllers/ProductController.kt

@@ -4,7 +4,9 @@ import com.example.demo.http.exceptions.NotFoundException
 import com.example.demo.http.exceptions.UnprocessableException
 import com.example.demo.http.requests.CreateProductRequest
 import com.example.demo.http.responses.makeOkResponse
-import com.example.demo.services.ProductService
+import com.example.demo.services.database.exceptions.AlreadyDeletedException
+import com.example.demo.services.database.product.ProductService
+import com.example.demo.services.database.product.exceptions.ProductNotFoundException
 import com.example.demo.services.kafka.exceptions.InvalidArgumentException
 import jakarta.validation.Valid
 import org.springframework.http.HttpStatus
@@ -65,7 +67,13 @@ class ProductController(
     fun deleteProduct(
         @PathVariable guid: UUID,
     ): ResponseEntity<Any> {
-        productService.delete(guid)
+        try {
+            productService.delete(guid)
+        } catch (notFoundException: ProductNotFoundException) {
+            throw NotFoundException()
+        } catch (alreadyDeletedException: AlreadyDeletedException) {
+            throw UnprocessableException("product already deleted")
+        }
 
         return ResponseEntity(makeOkResponse(), HttpStatus.OK)
     }

src/main/kotlin/com/example/demo/http/controllers/ShopController.kt

@@ -1,7 +1,7 @@
 package com.example.demo.http.controllers
 
 import com.example.demo.http.exceptions.NotFoundException
-import com.example.demo.provider.ShopProvider
+import com.example.demo.providers.ShopProvider
 import jakarta.servlet.http.HttpServletResponse
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.encodeToJsonElement

src/main/kotlin/com/example/demo/provider/html/Center.kt

@@ -1,3 +0,0 @@
-package com.example.demo.provider.html
-
-class Center: Tag("center")

src/main/kotlin/com/example/demo/provider/html/TD.kt

@@ -1,3 +0,0 @@
-package com.example.demo.provider.html
-
-class TD: Tag("td")

src/main/kotlin/com/example/demo/providers/CityRepository.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider
+package com.example.demo.providers
 
 import com.example.demo.models.City
 import org.springframework.data.jdbc.repository.query.Query

src/main/kotlin/com/example/demo/providers/MockedShopProvider.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider
+package com.example.demo.providers
 
 import com.example.demo.models.*
 import java.time.OffsetDateTime

src/main/kotlin/com/example/demo/providers/ProductRepository.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider
+package com.example.demo.providers
 
 import com.example.demo.models.Product
 import org.springframework.data.jdbc.repository.query.Query

src/main/kotlin/com/example/demo/providers/ShopProvider.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider
+package com.example.demo.providers
 
 import com.example.demo.models.Shop
 

src/main/kotlin/com/example/demo/providers/html/Attribute.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 class Attribute(val name : String, val value : String) {
     override fun toString() = """$name="$value" """

src/main/kotlin/com/example/demo/providers/html/Center.kt

@@ -0,0 +1,3 @@
+package com.example.demo.providers.html
+
+class Center: Tag("center")

src/main/kotlin/com/example/demo/providers/html/Html.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 class Html: Tag("html")
 

src/main/kotlin/com/example/demo/providers/html/HtmlProvider.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 fun getTitleColor() = "#b9c9fe"
 fun getCellColor(index: Int, row: Int) = if ((index + row) %2 == 0) "#dce4ff" else "#eff2ff"

src/main/kotlin/com/example/demo/providers/html/InnerProduct.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 data class InnerProduct(val description: String, val price: Double, val popularity: Int)
 

src/main/kotlin/com/example/demo/providers/html/TD.kt

@@ -0,0 +1,3 @@
+package com.example.demo.providers.html
+
+class TD: Tag("td")

src/main/kotlin/com/example/demo/providers/html/TR.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 class TR: Tag("tr")
 

src/main/kotlin/com/example/demo/providers/html/Table.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 class Table: Tag("table")
 

src/main/kotlin/com/example/demo/providers/html/Tag.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 open class Tag(val name: String) {
     val children: MutableList<Tag> = ArrayList()

src/main/kotlin/com/example/demo/providers/html/Text.kt

@@ -1,4 +1,4 @@
-package com.example.demo.provider.html
+package com.example.demo.providers.html
 
 class Text(val text: String): Tag("b") {
     override fun toString() = text

src/main/kotlin/com/example/demo/services/CityService.kt

@@ -1,17 +0,0 @@
-package com.example.demo.services
-
-import com.example.demo.http.exceptions.NotFoundException
-import com.example.demo.http.exceptions.UnprocessableException
-import com.example.demo.models.City
-import org.springframework.stereotype.Service
-import java.util.*
-
-@Service
-interface CityService {
-    fun findByGuid(guid: UUID): City?
-
-    fun create(name: String): City?
-
-    @Throws(NotFoundException::class, UnprocessableException::class)
-    fun delete(guid: UUID): City?
-}

src/main/kotlin/com/example/demo/services/database/city/CityService.kt

@@ -0,0 +1,17 @@
+package com.example.demo.services.database.city
+
+import com.example.demo.models.City
+import com.example.demo.services.database.exceptions.AlreadyDeletedException
+import com.example.demo.services.database.city.exceptions.CityNotFoundException
+import org.springframework.stereotype.Service
+import java.util.*
+
+@Service
+interface CityService {
+    fun findByGuid(guid: UUID): City?
+
+    fun create(name: String): City?
+
+    @Throws(CityNotFoundException::class, AlreadyDeletedException::class)
+    fun delete(guid: UUID): City?
+}

src/main/kotlin/com/example/demo/services/database/city/CityServiceImpl.kt

@@ -1,9 +1,9 @@
-package com.example.demo.services
+package com.example.demo.services.database.city
 
-import com.example.demo.http.exceptions.NotFoundException
-import com.example.demo.http.exceptions.UnprocessableException
 import com.example.demo.models.City
-import com.example.demo.provider.CityRepository
+import com.example.demo.providers.CityRepository
+import com.example.demo.services.database.exceptions.AlreadyDeletedException
+import com.example.demo.services.database.city.exceptions.CityNotFoundException
 import java.time.OffsetDateTime
 import java.util.*
 
@@ -26,10 +26,10 @@ class CityServiceImpl(
     }
 
     override fun delete(guid: UUID): City? {
-        val city = findByGuid(guid) ?: throw NotFoundException()
+        val city = findByGuid(guid) ?: throw CityNotFoundException()
 
         if (city.isDeleted()) {
-            throw UnprocessableException("city already deleted")
+            throw AlreadyDeletedException()
         }
 
         val deletedCity = city.copy(

src/main/kotlin/com/example/demo/services/database/city/exceptions/CityNotFoundException.kt

@@ -0,0 +1,3 @@
+package com.example.demo.services.database.city.exceptions
+
+class CityNotFoundException: RuntimeException()

src/main/kotlin/com/example/demo/services/database/exceptions/AlreadyDeletedException.kt

@@ -0,0 +1,3 @@
+package com.example.demo.services.database.exceptions
+
+class AlreadyDeletedException: RuntimeException()

src/main/kotlin/com/example/demo/services/database/product/ProductService.kt

@@ -1,8 +1,8 @@
-package com.example.demo.services
+package com.example.demo.services.database.product
 
-import com.example.demo.http.exceptions.NotFoundException
-import com.example.demo.http.exceptions.UnprocessableException
 import com.example.demo.models.Product
+import com.example.demo.services.database.exceptions.AlreadyDeletedException
+import com.example.demo.services.database.product.exceptions.ProductNotFoundException
 import com.example.demo.services.kafka.exceptions.InvalidArgumentException
 import org.springframework.stereotype.Service
 import java.util.*
@@ -13,9 +13,9 @@ interface ProductService {
 
     fun create(name: String, price: Long, description: String?): Product
 
-    @Throws(NotFoundException::class, UnprocessableException::class)
+    @Throws(ProductNotFoundException::class, AlreadyDeletedException::class)
     fun delete(guid: UUID): Product?
 
-    @Throws(NotFoundException::class, InvalidArgumentException::class)
+    @Throws(ProductNotFoundException::class, InvalidArgumentException::class)
     fun syncToKafka(guid: UUID, topic: String?)
 }

src/main/kotlin/com/example/demo/services/database/product/ProductServiceImpl.kt

@@ -1,9 +1,9 @@
-package com.example.demo.services
+package com.example.demo.services.database.product
 
-import com.example.demo.http.exceptions.NotFoundException
-import com.example.demo.http.exceptions.UnprocessableException
 import com.example.demo.models.Product
-import com.example.demo.provider.ProductRepository
+import com.example.demo.providers.ProductRepository
+import com.example.demo.services.database.exceptions.AlreadyDeletedException
+import com.example.demo.services.database.product.exceptions.ProductNotFoundException
 import com.example.demo.services.kafka.Producer
 import java.time.OffsetDateTime
 import java.util.*
@@ -31,10 +31,10 @@ class ProductServiceImpl(
     }
 
     override fun delete(guid: UUID): Product? {
-        val product = findByGuid(guid) ?: throw NotFoundException()
+        val product = findByGuid(guid) ?: throw ProductNotFoundException()
 
         if (product.isDeleted()) {
-            throw UnprocessableException("product already deleted")
+            throw AlreadyDeletedException()
         }
 
         val deletedProduct = product.copy(
@@ -52,7 +52,7 @@ class ProductServiceImpl(
     }
 
     override fun syncToKafka(guid: UUID, topic: String?) {
-        val product = findByGuid(guid) ?: throw NotFoundException()
+        val product = findByGuid(guid) ?: throw ProductNotFoundException()
 
         producer.produceProductInfo(topic ?: defaultSyncTopic, product)
     }

src/main/kotlin/com/example/demo/services/database/product/exceptions/ProductNotFoundException.kt

@@ -0,0 +1,3 @@
+package com.example.demo.services.database.product.exceptions
+
+class ProductNotFoundException: RuntimeException()