Revert "EntityLockProviderCache"

This reverts commit 85d7c8c.

Author: SergeiPavlov

Orm/Xtensive.Orm/Orm/Domain.cs

@@ -150,11 +150,6 @@ public static Domain Demand()
     /// </summary>
     internal ConcurrentDictionary<AssociationInfo, (CompilableProvider, Parameter<Xtensive.Tuples.Tuple>)> RefsToEntityQueryCache { get; } = new();
 
-    /// <summary>
-    /// Caches providers that lock certain type of entity with certain <see cref="LockMode"/> and <see cref="LockBehavior"/>.
-    /// </summary>
-    internal ConcurrentDictionary<(TypeInfo, LockMode, LockBehavior), ExecutableProvider> EntityLockProviderCache { get; } = new();
-
     internal object UpgradeContextCookie { get; private set; }
 
     internal SqlConnection SingleConnection { get; private set; }

Orm/Xtensive.Orm/Orm/DomainBound.cs

@@ -6,45 +6,45 @@
 
 using Xtensive.Core;
 
-namespace Xtensive.Orm
+
+namespace Xtensive.Orm;
+
+/// <summary>
+/// Base class for all objects that are bound to the <see cref="Domain"/> instance.
+/// </summary>
+public abstract class DomainBound: IContextBound<Domain>
 {
   /// <summary>
-  /// Base class for all objects that are bound to the <see cref="Domain"/> instance.
+  /// Gets <see cref="Domain"/> to which current instance is bound.
+  /// </summary>
+  public Domain Domain { get; internal set; }
+
+  #region IContextBound<Domain> Members
+
+  /// <inheritdoc/>
+  Domain IContextBound<Domain>.Context => Domain;
+
+  #endregion
+
+
+  // Constructors
+
+  /// <summary>
+  /// Initializes a new instance of this class.
+  /// </summary>
+  protected DomainBound()
+  {
+  }
+
+  /// <summary>
+  /// Initializes a new instance of this class.
   /// </summary>
-  public abstract class DomainBound: IContextBound<Domain>
+  /// <param name="domain"><see cref="Orm.Domain"/>, to which current instance
+  /// is bound.</param>
+  /// <exception cref="ArgumentNullException"><paramref name="domain"/> is <see langword="null" />.</exception>
+  protected DomainBound(Domain domain)
   {
-    /// <summary>
-    /// Gets <see cref="Domain"/> to which current instance is bound.
-    /// </summary>
-    public Domain Domain { get; internal set; }
-
-    #region IContextBound<Domain> Members
-
-    /// <inheritdoc/>
-    Domain IContextBound<Domain>.Context => Domain;
-
-    #endregion
-
-
-    // Constructors
-
-    /// <summary>
-    /// Initializes a new instance of this class.
-    /// </summary>
-    protected DomainBound() 
-    {
-    }
-
-    /// <summary>
-    /// Initializes a new instance of this class.
-    /// </summary>
-    /// <param name="domain"><see cref="Orm.Domain"/>, to which current instance 
-    /// is bound.</param>
-    /// <exception cref="ArgumentNullException"><paramref name="domain"/> is <see langword="null" />.</exception>
-    protected DomainBound(Domain domain)
-    {
-      ArgumentNullException.ThrowIfNull(domain);
-      Domain = domain;
-    }
+    ArgumentNullException.ThrowIfNull(domain);
+    Domain = domain;
   }
 }

Orm/Xtensive.Orm/Orm/Entity.cs

@@ -270,7 +270,7 @@ public void Lock(LockMode lockMode, LockBehavior lockBehavior)
     {
       var parameterContext = new ParameterContext();
       parameterContext.SetValue(keyParameter, Key.Value);
-      var source = Session.Domain.EntityLockProviderCache.GetOrAdd((TypeInfo, lockMode, lockBehavior), ExecutableProviderGenerator, Session);
+      var source = Session.StorageNode.EntityLockProviderCache.GetOrAdd((TypeInfo, lockMode, lockBehavior), ExecutableProviderGenerator, Session);
       using var recordSetReader = source.GetRecordSetReader(Session, parameterContext);
       recordSetReader.MoveNext();
     }

Orm/Xtensive.Orm/Orm/Providers/SessionHandler.cs

@@ -27,7 +27,7 @@ public abstract partial class SessionHandler : IDisposable, IAsyncDisposable
     /// <summary>
     /// Gets the current <see cref="Session"/>.
     /// </summary>
-    public Session Session { get; }
+    public Session Session { get; private set; }
 
     /// <summary>
     /// Gets the real session handler (the final handler in chain of all <see cref="ChainingSessionHandler"/>s).

Orm/Xtensive.Orm/Orm/StorageNode.cs

@@ -44,6 +44,12 @@ public sealed class StorageNode : ISessionSource
     /// </summary>
     public TypeIdRegistry TypeIdRegistry { get; private set; }
 
+    /// <summary>
+    /// Caches providers that lock certain type of entity with certain <see cref="LockMode"/> and <see cref="LockBehavior"/>.
+    /// </summary>
+    internal ConcurrentDictionary<(TypeInfo, LockMode, LockBehavior), ExecutableProvider> EntityLockProviderCache { get; } = new();
+
+
     /// <summary>
     /// Caches certain info about EntitySet fields, e.g. queries to fetch current count or items.
     /// </summary>