product-api: java bean validation

Author: mama-samba-braima

pom.xml

@@ -53,6 +53,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/com/amigoscode/product/NewProductRequest.java

@@ -1,11 +1,29 @@
 package com.amigoscode.product;
 
+import jakarta.validation.constraints.*;
+
 import java.math.BigDecimal;
 
 public record NewProductRequest(
+        @NotBlank
+        @Size(
+                min = 2,
+                max = 50,
+                message = "Name must be between 2 and 50 characters"
+        )
         String name,
+        @Size(
+                min = 5,
+                max = 500,
+                message = "Description must be between 5 and 500 characters"
+        )
         String description,
+        @NotNull(message = "Price is required")
+        @DecimalMin(value = "0.1", message = "Price must be greater than 0.1")
         BigDecimal price,
+
+        @NotNull(message = "Price is required")
+        @Min(value = 1, message = "Min Stock Level is 1")
         Integer stockLevel,
         String imageUrl
 ) {

src/main/java/com/amigoscode/product/Product.java

@@ -19,6 +19,7 @@ public class Product {
     @Column(nullable = false, length = 50)
     private String name;
 
+    @Column(length = 500)
     private String description;
 
     @Column(nullable = false, precision = 10, scale = 2)

src/main/java/com/amigoscode/product/ProductController.java

@@ -1,5 +1,7 @@
 package com.amigoscode.product;
 
+import jakarta.validation.Valid;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -31,7 +33,7 @@ public void deleteProductById(@PathVariable("id") UUID id) {
     }
 
     @PostMapping
-    public UUID saveProduct(@RequestBody NewProductRequest product) {
+    public UUID saveProduct(@RequestBody @Valid NewProductRequest product) {
         return productService.saveNewProduct(product);
     }