feat: message broadcast endpoint mapping

server/src/main/java/server/api/UpdateMessagingController.java

@@ -0,0 +1,30 @@
+package server.api;
+
+import commons.Recipe;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.messaging.handler.annotation.MessageMapping;
+import org.springframework.messaging.handler.annotation.SendTo;
+import org.springframework.messaging.simp.SimpMessagingTemplate;
+import org.springframework.stereotype.Controller;
+
+@Controller
+public class UpdateMessagingController {
+    private final RecipeController recipeController;
+    @Autowired
+    public UpdateMessagingController(
+            RecipeController recipeController) {
+        this.recipeController = recipeController;
+    }
+
+    /**
+     * Mapping for STOMP: <code>SEND /updates/recipe</code>
+     * @param recipe The request body as a new {@link Recipe} object to update the original into
+     * @return The updated {@link Recipe} object wrapped in a {@link org.springframework.http.ResponseEntity}.
+     */
+    @MessageMapping("/updates/recipe")
+    @SendTo("/subscribe/recipe")
+    public ResponseEntity<Recipe> broadcastRecipeUpdate(Recipe recipe) {
+        return recipeController.updateRecipe(recipe.getId(), recipe);
+    }
+}