Memory Leaks

src/OrchardCore.Modules/OrchardCore.Admin/AdminPageRouteModelProvider.cs

@@ -6,15 +6,14 @@
 using Microsoft.AspNetCore.Mvc.ApplicationModels;
 using Microsoft.AspNetCore.Mvc.ApplicationParts;
 using Microsoft.AspNetCore.Mvc.Razor.Compilation;
+using Microsoft.AspNetCore.Mvc.Razor.Extensions;
 using Microsoft.Extensions.Hosting;
 using OrchardCore.Mvc;
 
 namespace OrchardCore.Admin
 {
     internal class AdminPageRouteModelProvider : IPageRouteModelProvider
     {
-        private const string RazorPageDocumentKind = "mvc.1.0.razor-page";
-
         private readonly IHostEnvironment _hostingEnvironment;
         private readonly ApplicationPartManager _applicationManager;
 
@@ -75,7 +74,8 @@ public void OnProvidersExecuted(PageRouteModelProviderContext context)
         {
         }
 
-        private static IEnumerable<CompiledViewDescriptor> GetPageDescriptors<T>(ApplicationPartManager applicationManager) where T : ViewsFeature, new()
+        private static IEnumerable<CompiledViewDescriptor> GetPageDescriptors<T>(ApplicationPartManager applicationManager)
+            where T : ViewsFeature, new()
         {
             if (applicationManager == null)
             {
@@ -100,7 +100,8 @@ public void OnProvidersExecuted(PageRouteModelProviderContext context)
             }
         }
 
-        private static bool IsRazorPage(CompiledViewDescriptor viewDescriptor) => viewDescriptor.Item?.Kind == RazorPageDocumentKind;
+        private static bool IsRazorPage(CompiledViewDescriptor viewDescriptor) =>
+            viewDescriptor.Item?.Kind == RazorPageDocumentClassifierPass.RazorPageDocumentKind;
 
         private static T GetViewFeature<T>(ApplicationPartManager applicationManager) where T : ViewsFeature, new()
         {

src/OrchardCore.Modules/OrchardCore.AutoSetup/AutoSetupMiddleware.cs

@@ -128,7 +128,10 @@ public async Task InvokeAsync(HttpContext httpContext)
                     }
 
                     // Check if the tenant was installed by another instance.
-                    var settings = await _shellSettingsManager.LoadSettingsAsync(_shellSettings.Name);
+                    using var settings = (await _shellSettingsManager
+                        .LoadSettingsAsync(_shellSettings.Name))
+                        .AsDisposable();
+
                     if (!settings.IsUninitialized())
                     {
                         await _shellHost.ReloadShellContextAsync(_shellSettings, eventSource: false);
@@ -204,9 +207,10 @@ public async Task<bool> SetupTenantAsync(ISetupService setupService, TenantSetup
         /// <returns>The <see cref="ShellSettings"/>.</returns>
         public async Task<ShellSettings> CreateTenantSettingsAsync(TenantSetupOptions setupOptions)
         {
-            var shellSettings = _shellSettingsManager
+            using var shellSettings = _shellSettingsManager
                 .CreateDefaultSettings()
-                .AsUninitialized();
+                .AsUninitialized()
+                .AsDisposable();
 
             shellSettings.Name = setupOptions.ShellName;
             shellSettings.RequestUrlHost = setupOptions.RequestUrlHost;

src/OrchardCore.Modules/OrchardCore.Tenants/Controllers/AdminController.cs

@@ -299,7 +299,10 @@ public async Task<IActionResult> Create()
             var recipes = recipeCollections.SelectMany(x => x).Where(x => x.IsSetupRecipe).OrderBy(r => r.DisplayName).ToArray();
 
             // Creates a default shell settings based on the configuration.
-            var shellSettings = _shellSettingsManager.CreateDefaultSettings();
+            using var shellSettings = _shellSettingsManager
+                .CreateDefaultSettings()
+                .AsUninitialized()
+                .AsDisposable();
 
             var currentFeatureProfiles = shellSettings.GetFeatureProfiles();
             var featureProfiles = await GetFeatureProfilesAsync(currentFeatureProfiles);
@@ -348,9 +351,10 @@ public async Task<IActionResult> Create(EditTenantViewModel model)
             if (ModelState.IsValid)
             {
                 // Creates a default shell settings based on the configuration.
-                var shellSettings = _shellSettingsManager
+                using var shellSettings = _shellSettingsManager
                     .CreateDefaultSettings()
-                    .AsUninitialized();
+                    .AsUninitialized()
+                    .AsDisposable();
 
                 shellSettings.Name = model.Name;
                 shellSettings.RequestUrlHost = model.RequestUrlHost;

src/OrchardCore.Modules/OrchardCore.Tenants/Controllers/ApiController.cs

@@ -105,9 +105,10 @@ public async Task<IActionResult> Create(TenantApiModel model)
                 if (model.IsNewTenant)
                 {
                     // Creates a default shell settings based on the configuration.
-                    var shellSettings = _shellSettingsManager
+                    using var shellSettings = _shellSettingsManager
                         .CreateDefaultSettings()
-                        .AsUninitialized();
+                        .AsUninitialized()
+                        .AsDisposable();
 
                     shellSettings.Name = model.Name;
                     shellSettings.RequestUrlHost = model.RequestUrlHost;
@@ -124,14 +125,15 @@ public async Task<IActionResult> Create(TenantApiModel model)
                     shellSettings["FeatureProfile"] = string.Join(',', model.FeatureProfiles ?? Array.Empty<string>());
 
                     await _shellHost.UpdateShellSettingsAsync(shellSettings);
+                    var reloadedSettings = _shellHost.GetSettings(shellSettings.Name);
 
-                    var token = CreateSetupToken(shellSettings);
+                    var token = CreateSetupToken(reloadedSettings);
 
-                    return Ok(GetEncodedUrl(shellSettings, token));
+                    return Ok(GetEncodedUrl(reloadedSettings, token));
                 }
                 else
                 {
-                    // Site already exists, return 201 for indempotency purposes.
+                    // Site already exists, return 201 for idempotency purposes.
 
                     var token = CreateSetupToken(settings);
 

src/OrchardCore.Modules/OrchardCore.Tenants/Services/TenantValidator.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
@@ -82,7 +81,11 @@ public async Task<IEnumerable<ModelError>> ValidateAsync(TenantModelBase model)
                 if (existingShellSettings is null)
                 {
                     // Set the settings to be validated.
-                    shellSettings = _shellSettingsManager.CreateDefaultSettings();
+                    shellSettings = _shellSettingsManager
+                        .CreateDefaultSettings()
+                        .AsUninitialized()
+                        .AsDisposable();
+
                     shellSettings.Name = model.Name;
                 }
                 else if (existingShellSettings.IsDefaultShell())
@@ -106,6 +109,9 @@ public async Task<IEnumerable<ModelError>> ValidateAsync(TenantModelBase model)
 
             if (shellSettings is not null)
             {
+                // A newly loaded settings from the configuration should be disposed.
+                using var disposable = existingShellSettings is null ? shellSettings : null;
+
                 var validationContext = new DbConnectionValidatorContext(shellSettings, model);
                 await ValidateConnectionAsync(validationContext, errors);
             }

src/OrchardCore.Modules/OrchardCore.Tenants/Workflows/Activities/CreateTenantTask.cs

@@ -118,7 +118,10 @@ public async override Task<ActivityExecutionResult> ExecuteAsync(WorkflowExecuti
             var featureProfile = (await ExpressionEvaluator.EvaluateAsync(FeatureProfile, workflowContext, null))?.Trim();
 
             // Creates a default shell settings based on the configuration.
-            var shellSettings = ShellSettingsManager.CreateDefaultSettings();
+            using var shellSettings = ShellSettingsManager
+                .CreateDefaultSettings()
+                .AsUninitialized()
+                .AsDisposable();
 
             shellSettings.Name = tenantName;
 
@@ -172,9 +175,10 @@ public async override Task<ActivityExecutionResult> ExecuteAsync(WorkflowExecuti
             shellSettings["Secret"] = Guid.NewGuid().ToString();
 
             await ShellHost.UpdateShellSettingsAsync(shellSettings);
+            var reloadedSettings = ShellHost.GetSettings(shellSettings.Name);
 
-            workflowContext.LastResult = shellSettings;
-            workflowContext.CorrelationId = shellSettings.Name;
+            workflowContext.LastResult = reloadedSettings;
+            workflowContext.CorrelationId = reloadedSettings.Name;
 
             return Outcomes("Done");
         }

src/OrchardCore/OrchardCore.Abstractions/Shell/Builders/ShellContext.cs

@@ -12,14 +12,24 @@ namespace OrchardCore.Environment.Shell.Builders
     /// </summary>
     public class ShellContext : IDisposable, IAsyncDisposable
     {
-        private bool _disposed;
         private List<WeakReference<ShellContext>> _dependents;
         private readonly SemaphoreSlim _semaphore = new(1);
+        private bool _disposed;
 
         internal volatile int _refCount;
         internal volatile int _terminated;
         internal bool _released;
 
+        /// <summary>
+        /// Initializes a new <see cref="ShellContext"/>.
+        /// </summary>
+        public ShellContext() => UtcTicks = DateTime.UtcNow.Ticks;
+
+        /// <summary>
+        /// The creation date and time of this shell context in ticks.
+        /// </summary>
+        public long UtcTicks { get; }
+
         /// <summary>
         /// The <see cref="ShellSettings"/> holding the tenant settings and configuration.
         /// </summary>
@@ -56,7 +66,6 @@ public class PlaceHolder : ShellContext
             public PlaceHolder()
             {
                 _released = true;
-                _disposed = true;
             }
 
             /// <summary>
@@ -101,7 +110,12 @@ public async Task<ShellScope> CreateScopeAsync()
         public int ActiveScopes => _refCount;
 
         /// <summary>
-        /// Mark the <see cref="ShellContext"/> as released and then a candidate to be disposed.
+        /// Whether or not this instance uses shared <see cref="Settings"/> that should not be disposed.
+        /// </summary>
+        public bool SharedSettings { get; internal set; }
+
+        /// <summary>
+        /// Marks the <see cref="ShellContext"/> as released and then a candidate to be disposed.
         /// </summary>
         public Task ReleaseAsync() => ReleaseInternalAsync();
 
@@ -111,6 +125,14 @@ public async Task<ShellScope> CreateScopeAsync()
 
         internal async Task ReleaseInternalAsync(ReleaseMode mode = ReleaseMode.Normal)
         {
+            // A 'PlaceHolder' is always released.
+            if (this is PlaceHolder)
+            {
+                // But still try to dispose the settings.
+                await DisposeAsync();
+                return;
+            }
+
             if (_released)
             {
                 // Prevent infinite loops with circular dependencies
@@ -239,7 +261,6 @@ private void Close()
 
             _disposed = true;
 
-            // Disposes all the services registered for this shell.
             if (ServiceProvider is IDisposable disposable)
             {
                 disposable.Dispose();
@@ -257,7 +278,6 @@ private async ValueTask CloseAsync()
 
             _disposed = true;
 
-            // Disposes all the services registered for this shell.
             if (ServiceProvider is IAsyncDisposable asyncDisposable)
             {
                 await asyncDisposable.DisposeAsync();
@@ -276,6 +296,15 @@ private void Terminate()
             IsActivated = false;
             Blueprint = null;
             Pipeline = null;
+
+            _semaphore?.Dispose();
+
+            if (SharedSettings)
+            {
+                return;
+            }
+
+            Settings?.Dispose();
         }
 
         ~ShellContext() => Close();

src/OrchardCore/OrchardCore.Abstractions/Shell/Configuration/Internal/UpdatableDataProvider.cs

@@ -3,24 +3,23 @@
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading;
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.FileProviders;
 using Microsoft.Extensions.Primitives;
 
 namespace OrchardCore.Environment.Shell.Configuration.Internal
 {
-    internal class UpdatableDataProvider : IConfigurationProvider, IEnumerable<KeyValuePair<string, string>>
+    internal class UpdatableDataProvider : IConfigurationProvider, IConfigurationSource, IEnumerable<KeyValuePair<string, string>>
     {
-        private ConfigurationReloadToken _reloadToken = new();
+        public UpdatableDataProvider() => Data = new(StringComparer.OrdinalIgnoreCase);
 
         public UpdatableDataProvider(IEnumerable<KeyValuePair<string, string>> initialData)
         {
-            Data = new ConcurrentDictionary<string, string>(initialData, StringComparer.OrdinalIgnoreCase);
+            initialData ??= Enumerable.Empty<KeyValuePair<string, string>>();
+            Data = new(initialData, StringComparer.OrdinalIgnoreCase);
         }
 
-        protected IDictionary<string, string> Data { get; set; }
-
-        public void Add(string key, string value) => Data.Add(key, value);
+        protected ConcurrentDictionary<string, string> Data { get; set; }
 
         public IEnumerator<KeyValuePair<string, string>> GetEnumerator() => Data.GetEnumerator();
 
@@ -51,17 +50,10 @@ private static string Segment(string key, int prefixLength)
             return indexOf < 0 ? key[prefixLength..] : key[prefixLength..indexOf];
         }
 
-        public IChangeToken GetReloadToken()
-        {
-            return _reloadToken;
-        }
-
-        protected void OnReload()
-        {
-            var previousToken = Interlocked.Exchange(ref _reloadToken, new ConfigurationReloadToken());
-            previousToken.OnReload();
-        }
+        public IChangeToken GetReloadToken() => NullChangeToken.Singleton;
 
         public override string ToString() => $"{GetType().Name}";
+
+        public IConfigurationProvider Build(IConfigurationBuilder builder) => this;
     }
 }