Consolidate data access control backoffice updates

src/main/java/com/cloudhandson/vpdbackoffice/web/SchemaMetadataController.java

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+package com.cloudhandson.vpdbackoffice.web;
+
+import com.cloudhandson.vpdbackoffice.service.AppException;
+import com.cloudhandson.vpdbackoffice.service.SchemaMetadataService;
+import org.springframework.dao.DataAccessException;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.servlet.mvc.support.RedirectAttributes;
+
+@Controller
+public class SchemaMetadataController {
+
+  private final SchemaMetadataService schemaMetadataService;
+
+  public SchemaMetadataController(SchemaMetadataService schemaMetadataService) {
+    this.schemaMetadataService = schemaMetadataService;
+  }
+
+  @GetMapping("/schema-metadata")
+  public String schemaMetadata(@RequestParam(required = false) String table, Model model) {
+    String selectedKey = table == null || table.isBlank() ? schemaMetadataService.defaultKey() : table;
+    model.addAttribute("tables", schemaMetadataService.tables());
+    model.addAttribute("selectedKey", selectedKey);
+    try {
+      model.addAttribute("metadata", schemaMetadataService.find(selectedKey));
+    } catch (AppException | DataAccessException exception) {
+      model.addAttribute("errorMessage", safeMessage(exception));
+    }
+    return "schema-metadata";
+  }
+
+  @PostMapping("/schema-metadata/table-comment")
+  public String updateTableComment(
+      @RequestParam String table,
+      @RequestParam(required = false) String comment,
+      RedirectAttributes redirectAttributes
+  ) {
+    try {
+      schemaMetadataService.updateTableComment(table, comment);
+      redirectAttributes.addFlashAttribute("message", "테이블 comment를 저장했습니다.");
+    } catch (AppException | DataAccessException exception) {
+      redirectAttributes.addFlashAttribute("errorMessage", safeMessage(exception));
+    }
+    return redirect(table);
+  }
+
+  @PostMapping("/schema-metadata/column-comment")
+  public String updateColumnComment(
+      @RequestParam String table,
+      @RequestParam String column,
+      @RequestParam(required = false) String comment,
+      RedirectAttributes redirectAttributes
+  ) {
+    try {
+      schemaMetadataService.updateColumnComment(table, column, comment);
+      redirectAttributes.addFlashAttribute("message", column + " 컬럼 comment를 저장했습니다.");
+    } catch (AppException | DataAccessException exception) {
+      redirectAttributes.addFlashAttribute("errorMessage", safeMessage(exception));
+    }
+    return redirect(table);
+  }
+
+  @PostMapping("/schema-metadata/table-annotation")
+  public String updateTableAnnotation(
+      @RequestParam String table,
+      @RequestParam String annotationName,
+      @RequestParam(required = false) String annotationValue,
+      RedirectAttributes redirectAttributes
+  ) {
+    try {
+      schemaMetadataService.updateTableAnnotation(table, annotationName, annotationValue);
+      redirectAttributes.addFlashAttribute("message", "테이블 annotation을 저장했습니다.");
+    } catch (AppException | DataAccessException exception) {
+      redirectAttributes.addFlashAttribute("errorMessage", safeMessage(exception));
+    }
+    return redirect(table);
+  }
+
+  @PostMapping("/schema-metadata/column-annotation")
+  public String updateColumnAnnotation(
+      @RequestParam String table,
+      @RequestParam String column,
+      @RequestParam String annotationName,
+      @RequestParam(required = false) String annotationValue,
+      RedirectAttributes redirectAttributes
+  ) {
+    try {
+      schemaMetadataService.updateColumnAnnotation(table, column, annotationName, annotationValue);
+      redirectAttributes.addFlashAttribute("message", column + " 컬럼 annotation을 저장했습니다.");
+    } catch (AppException | DataAccessException exception) {
+      redirectAttributes.addFlashAttribute("errorMessage", safeMessage(exception));
+    }
+    return redirect(table);
+  }
+
+  private String redirect(String table) {
+    return "redirect:/schema-metadata?table=" + (table == null ? "" : table);
+  }
+
+  private String safeMessage(Exception exception) {
+    return exception instanceof AppException
+        ? exception.getMessage()
+        : "DB 메타데이터를 저장하지 못했습니다. 권한, 식별자, Oracle annotation 문법을 확인하세요.";
+  }
+}