@@ -0,0 +1,130 @@
+package store.controller;
+
+import static store.constant.ConvenienceConstant.MAX_RETRIES;
+
+import java.util.List;
+import java.util.function.Supplier;
+import store.model.Status;
+import store.dto.request.input.AddingQuantityStatusRequest;
+import store.dto.request.input.AdditionalPurchaseStatusRequest;
+import store.dto.request.input.MembershipApplicationStatusRequest;
+import store.dto.request.input.PurchaseProductsRequest;
+import store.dto.request.input.RegularPricePaymentStatusRequest;
+import store.dto.response.ReceiptResponse;
+import store.dto.response.StocksResponse;
+import store.dto.server.StatusDto;
+import store.service.convenience.ConvenienceService;
+import store.view.InputView;
+import store.view.OutputView;
+
+public class ConvenienceController {
+
+    private final ConvenienceService convenienceService;
+
+    public ConvenienceController(ConvenienceService convenienceService) {
+        this.convenienceService = convenienceService;
+    }
+
+    public void run() {
+        do {
+            execute(this::processStart);
+            execute(() -> processStatuses(processPurchaseProducts()));
+            execute(this::processMembershipApplicationStatus);
+            execute(this::processReceipt);
+        } while (execute(this::processAdditionalPurchaseStatus));
+    }
+
+    private void processStart() {
+        OutputView.printStartGuidance();
+        StocksResponse stocksResponse = convenienceService.createStocksResponse();
+        OutputView.printStocks(stocksResponse);
+    }
+
+    private List<StatusDto> processPurchaseProducts() {
+        OutputView.printPurchaseProductsGuidance();
+        PurchaseProductsRequest purchaseProductsRequest = InputView.readPurchaseProducts();
+        convenienceService.createReceipt();
+        return convenienceService.purchaseProducts(purchaseProductsRequest);
+    }
+
+    private void processStatuses(List<StatusDto> statusDtos) {
+        for (StatusDto statusDto : statusDtos) {
+            if (statusDto.getStatus().equals(Status.ADDING_QUANTITY)) {
+                execute(() -> processAddingQuantityStatus(statusDto));
+                continue;
+            }
+            if (statusDto.getStatus().equals(Status.REGULAR_PRICE_PAYMENT)) {
+                execute(() -> processRegularPricePaymentStatus(statusDto));
+            }
+        }
+    }
+
+    private void processAddingQuantityStatus(StatusDto statusDto) {
+        OutputView.printAddingQuantityStatusGuidance(statusDto.getProductName(), statusDto.getQuantity());
+        AddingQuantityStatusRequest addingQuantityStatusRequest = InputView.readAddingQuantityStatus();
+        if (addingQuantityStatusRequest.isAddingQuantityStatus()) {
+            convenienceService.applyAddingQuantity(statusDto);
+        }
+    }
+
+    private void processRegularPricePaymentStatus(StatusDto statusDto) {
+        OutputView.printRegularPricePaymentStatusGuidance(statusDto.getProductName(), statusDto.getQuantity());
+        RegularPricePaymentStatusRequest regularPricePaymentStatusRequest = InputView.readRegularPricePaymentStatus();
+        if (regularPricePaymentStatusRequest.isRegularPricePaymentStatus()) {
+            convenienceService.applyRegularPricePayment(statusDto);
+        }
+    }
+
+    private void processMembershipApplicationStatus() {
+        OutputView.printMembershipApplicationStatusGuidance();
+        MembershipApplicationStatusRequest membershipApplicationStatusRequest = InputView.readMembershipApplicationStatus();
+        if (membershipApplicationStatusRequest.isMembershipApplicationStatus()) {
+            convenienceService.applyMembership();
+        }
+    }
+
+    private void processReceipt() {
+        ReceiptResponse receiptResponse = convenienceService.createReceiptResponse();
+        OutputView.printReceipt(receiptResponse);
+    }
+
+    private boolean processAdditionalPurchaseStatus() {
+        OutputView.printAdditionalPurchaseStatusGuidance();
+        AdditionalPurchaseStatusRequest additionalPurchaseStatusRequest = InputView.readAdditionalPurchaseStatus();
+        return additionalPurchaseStatusRequest.isAdditionalPurchaseStatus();
+    }
+
+    private void execute(Runnable action) {
+        execute(action, 0);
+    }
+
+    private void execute(Runnable action, int attempts) {
+        try {
+            action.run();
+        } catch (RuntimeException e) {
+            if (attempts == MAX_RETRIES) {
+                OutputView.printErrorMessage(e);
+                return;
+            }
+            OutputView.printErrorMessage(e);
+            execute(action, attempts + 1);
+        }
+    }
+
+    private boolean execute(Supplier<Boolean> action) {
+        return execute(action, 0);
+    }
+
+    private boolean execute(Supplier<Boolean> action, int attempts) {
+        try {
+            return action.get();
+        } catch (RuntimeException e) {
+            if (attempts == MAX_RETRIES) {
+                OutputView.printErrorMessage(e);
+                return false;
+            }
+            OutputView.printErrorMessage(e);
+            return execute(action, attempts + 1);
+        }
+    }
+}

리뷰: 사소하지만 StatusDto.status에 null이 들어있으면 NPE가 발생할 수 있을 것 같습니다!
어떻게 개선할 수 있을까요..!?