downgrade ef to 7

There's a performance regression for synchronous insert/update in npgsql
ef adapter, we'll have to switch to asynchronous db calls before
updating

src/Attributes/VikingSession.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Mvc.Filters;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
 using sodoff.Model;
 
 namespace sodoff.Attributes;
@@ -12,6 +13,9 @@ public class VikingSession : Attribute, IAsyncActionFilter {
     public Modes Mode { get; set; } = Modes.VIKING;
     public bool  UseLock = false;
 
+    private static Dictionary<string, SemaphoreSlim> semaphores = new();
+    private static SemaphoreSlim dictSemaphore = new(1, 1);
+
     public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next) {
         DBContext ctx = context.HttpContext.RequestServices.GetService(typeof(DBContext)) as DBContext;
 
@@ -44,15 +48,16 @@ public class VikingSession : Attribute, IAsyncActionFilter {
             // NOTE: we can't refer to session.User / session.Viking here,
             //       because it may cause to ignore modifications from the threads we are waiting for
             //       we can use its only after vikingMutex.WaitOne()
-
-            Mutex vikingMutex = new Mutex(false, "SoDOffViking:" + userVikingId);
+            string semKey = "SoDOffViking:" + userVikingId;
+            SemaphoreSlim semaphore = await GetSemaphore(semKey);
             try {
-                vikingMutex.WaitOne();
+                await semaphore.WaitAsync();
                 context.ActionArguments["user"] = session.User;
                 context.ActionArguments["viking"] = session.Viking;
                 await next();
             } finally {
-                vikingMutex.ReleaseMutex();
+                semaphore.Release();
+                await RemoveSemaphore(semKey, semaphore);
             }
         } else {
             context.ActionArguments["user"] = session.User;
@@ -60,4 +65,22 @@ public class VikingSession : Attribute, IAsyncActionFilter {
             await next();
         }
     }
+
+    private static async Task<SemaphoreSlim> GetSemaphore(string key) {
+        await dictSemaphore.WaitAsync();
+        if (!semaphores.TryGetValue(key, out SemaphoreSlim semaphore)) {
+            semaphore = new SemaphoreSlim(1, 1);
+            semaphores.Add(key, semaphore);
+        }
+        dictSemaphore.Release();
+        return semaphore;
+    }
+
+    private static async Task RemoveSemaphore(string key, SemaphoreSlim sem) {
+        await dictSemaphore.WaitAsync();
+        if (sem.CurrentCount == 1) {
+            semaphores.Remove(key);
+        }
+        dictSemaphore.Release();
+    }
 }

src/Controllers/Common/ContentController.cs

@@ -570,7 +570,7 @@ public class ContentController : Controller {
     [HttpPost]
     [Produces("application/xml")]
     [Route("V2/ContentWebService.asmx/CreatePet")]
-    [VikingSession]
+    [VikingSession(UseLock = true)]
     public IActionResult CreatePet(Viking viking, [FromForm] string request) {
         RaisedPetRequest raisedPetRequest = XmlUtil.DeserializeXml<RaisedPetRequest>(request);
         // TODO: Investigate SetAsSelectedPet and UnSelectOtherPets - they don't seem to do anything
@@ -602,7 +602,6 @@ public class ContentController : Controller {
 
         if (raisedPetRequest.SetAsSelectedPet == true) {
             viking.SelectedDragon = dragon;
-            ctx.Update(viking);
         }
         ctx.Dragons.Add(dragon);
         ctx.Images.Add(image);
@@ -905,7 +904,7 @@ public class ContentController : Controller {
     [HttpPost]
     [Produces("application/xml")]
     [Route("ContentWebService.asmx/SetImage")]
-    [VikingSession]
+    [VikingSession(UseLock = true)]
     public bool SetImage(Viking viking, [FromForm] string ImageType, [FromForm] int ImageSlot, [FromForm] string contentXML, [FromForm] string imageFile) {
         // TODO: the other properties of contentXML
         ImageData data = XmlUtil.DeserializeXml<ImageData>(contentXML);
@@ -925,11 +924,8 @@ public class ContentController : Controller {
         image.ImageData = imageFile;
         image.TemplateName = data.TemplateName;
 
-        if (newImage) {
+        if (newImage)
             ctx.Images.Add(image);
-        } else {
-            ctx.Images.Update(image);
-        }
         ctx.SaveChanges();
 
         return true;

src/appsettings.json

@@ -74,7 +74,7 @@
   "Logging": {
     "LogLevel": {
       "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
+      "Microsoft.AspNetCore": "Information"
     }
   },
   "AllowedHosts": "*"

src/sodoff.csproj

@@ -11,26 +11,26 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="9.0.6" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="7.0.20" />
   </ItemGroup>
   <Choose>
     <When Condition="$(DefineConstants.Contains('USE_SQLITE'))">
         <ItemGroup>
-            <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.6" />
+            <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.20" />
         </ItemGroup>
     </When>
   </Choose>
   <Choose>
     <When Condition="$(DefineConstants.Contains('USE_POSTGRESQL'))">
         <ItemGroup>
-            <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
+            <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.18" />
         </ItemGroup>
     </When>
   </Choose>
   <Choose>
     <When Condition="$(DefineConstants.Contains('USE_MYSQL'))">
         <ItemGroup>
-            <PackageReference Include="MySql.EntityFrameworkCore" Version="9.0.3" />
+            <PackageReference Include="MySql.EntityFrameworkCore" Version="7.0.16" />
         </ItemGroup>
     </When>
   </Choose>