area api impl

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/controller/AreaCalculationController.java

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+package com.baeldung.ratelimiting.controller;
+
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.ratelimiting.dto.AreaV1;
+import com.baeldung.ratelimiting.dto.RectangleDimensionsV1;
+import com.baeldung.ratelimiting.dto.TriangleDimensionsV1;
+
+@RestController
+@RequestMapping(value = "/api/v1/area", consumes = MediaType.APPLICATION_JSON_VALUE)
+class AreaCalculationController {
+
+    @PostMapping(value = "/rectangle", produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<AreaV1> rectangle(@RequestBody RectangleDimensionsV1 dimensions) {
+
+        return ResponseEntity.ok(new AreaV1("rectangle", dimensions.getLength() * dimensions.getWidth()));
+    }
+
+    @PostMapping(value = "/triangle", produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<AreaV1> triangle(@RequestBody TriangleDimensionsV1 dimensions) {
+
+        return ResponseEntity.ok(new AreaV1("triangle", 0.5d * dimensions.getHeight() * dimensions.getBase()));
+    }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/dto/AreaV1.java

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+package com.baeldung.ratelimiting.dto;
+
+public class AreaV1 {
+
+    private String shape;
+    private Double area;
+    
+    public AreaV1(String shape, Double area) {
+        this.area = area;
+        this.shape = shape;
+    }
+    
+    public Double getArea() {
+        return area;
+    }
+    
+    public String getShape() {
+        return shape;
+    }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/dto/RectangleDimensionsV1.java

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+package com.baeldung.ratelimiting.dto;
+
+public class RectangleDimensionsV1 {
+
+  private double length;
+  private double width;
+
+  public double getLength() {
+    return length;
+  }
+
+  public double getWidth() {
+    return width;
+  }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/dto/TriangleDimensionsV1.java

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+package com.baeldung.ratelimiting.dto;
+
+public class TriangleDimensionsV1 {
+
+    private double base;
+    private double height;
+
+    public double getBase() {
+      return base;
+    }
+
+    public double getHeight() {
+      return height;
+    }
+}