Double check _requestLocalizationOptions

framework/src/Volo.Abp.AspNetCore/Microsoft/AspNetCore/RequestLocalization/DefaultAbpRequestLocalizationOptionsProvider.cs

@@ -50,35 +50,38 @@ namespace Microsoft.AspNetCore.RequestLocalization
             {
                 using (await _syncSemaphore.LockAsync())
                 {
-                    using (var serviceScope = _serviceProviderFactory.CreateScope())
+                    if (_requestLocalizationOptions == null)
                     {
-                        var languageProvider = serviceScope.ServiceProvider.GetRequiredService<ILanguageProvider>();
-                        var settingProvider = serviceScope.ServiceProvider.GetRequiredService<ISettingProvider>();
+                        using (var serviceScope = _serviceProviderFactory.CreateScope())
+                        {
+                            var languageProvider = serviceScope.ServiceProvider.GetRequiredService<ILanguageProvider>();
+                            var settingProvider = serviceScope.ServiceProvider.GetRequiredService<ISettingProvider>();
 
-                        var languages = await languageProvider.GetLanguagesAsync();
-                        var defaultLanguage = await settingProvider.GetOrNullAsync(LocalizationSettingNames.DefaultLanguage);
+                            var languages = await languageProvider.GetLanguagesAsync();
+                            var defaultLanguage = await settingProvider.GetOrNullAsync(LocalizationSettingNames.DefaultLanguage);
 
-                        var options = !languages.Any()
-                            ? new RequestLocalizationOptions()
-                            : new RequestLocalizationOptions
-                            {
-                                DefaultRequestCulture = DefaultGetRequestCulture(defaultLanguage, languages),
+                            var options = !languages.Any()
+                                ? new RequestLocalizationOptions()
+                                : new RequestLocalizationOptions
+                                {
+                                    DefaultRequestCulture = DefaultGetRequestCulture(defaultLanguage, languages),
 
-                                SupportedCultures = languages
-                                    .Select(l => l.CultureName)
-                                    .Distinct()
-                                    .Select(c => new CultureInfo(c))
-                                    .ToArray(),
+                                    SupportedCultures = languages
+                                        .Select(l => l.CultureName)
+                                        .Distinct()
+                                        .Select(c => new CultureInfo(c))
+                                        .ToArray(),
 
-                                SupportedUICultures = languages
-                                    .Select(l => l.UiCultureName)
-                                    .Distinct()
-                                    .Select(c => new CultureInfo(c))
-                                    .ToArray()
-                            };
+                                    SupportedUICultures = languages
+                                        .Select(l => l.UiCultureName)
+                                        .Distinct()
+                                        .Select(c => new CultureInfo(c))
+                                        .ToArray()
+                                };
 
-                        _optionsAction?.Invoke(options);
-                        _requestLocalizationOptions = options;
+                            _optionsAction?.Invoke(options);
+                            _requestLocalizationOptions = options;
+                        }
                     }
                 }
             }
@@ -98,4 +101,4 @@ namespace Microsoft.AspNetCore.RequestLocalization
             return new RequestCulture(cultureName, uiCultureName);
         }
     }
-}
+}