Refactored.

src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/Uow/AbpUowActionFilter.cs

@@ -32,7 +32,7 @@ namespace Volo.Abp.AspNetCore.Mvc.Uow
                 return;
             }
 
-            var options = new UnitOfWorkStartOptions();
+            var options = new UnitOfWorkOptions();
 
             unitOfWorkAttr?.SetOptions(options);
 

src/Volo.Abp/Volo/Abp/Uow/ChildUnitOfWork.cs

@@ -9,7 +9,7 @@ namespace Volo.Abp.Uow
     {
         public Guid Id => _parent.Id;
 
-        public IUnitOfWorkStartOptions Options => _parent.Options;
+        public IUnitOfWorkOptions Options => _parent.Options;
 
         public IUnitOfWork Outer => _parent.Outer;
 
@@ -30,9 +30,9 @@ namespace Volo.Abp.Uow
             _parent.SetOuter(outer);
         }
 
-        public void SetOptions(UnitOfWorkStartOptions options)
+        public void Initialize(UnitOfWorkOptions options)
         {
-            _parent.SetOptions(options);
+            _parent.Initialize(options);
         }
 
         public event EventHandler Completed;

src/Volo.Abp/Volo/Abp/Uow/IUnitOfWork.cs

@@ -4,7 +4,7 @@ namespace Volo.Abp.Uow
 {
     public interface IUnitOfWork : IBasicUnitOfWork, IDatabaseApiContainer, ITransactionApiContainer
     {
-        IUnitOfWorkStartOptions Options { get; }
+        IUnitOfWorkOptions Options { get; }
 
         IUnitOfWork Outer { get; }
 
@@ -14,6 +14,6 @@ namespace Volo.Abp.Uow
 
         void SetOuter([CanBeNull] IUnitOfWork outer);
 
-        void SetOptions(UnitOfWorkStartOptions options);
+        void Initialize([NotNull] UnitOfWorkOptions options);
     }
 }

src/Volo.Abp/Volo/Abp/Uow/IUnitOfWorkManager.cs

@@ -8,13 +8,13 @@ namespace Volo.Abp.Uow
         IUnitOfWork Current { get; }
 
         [NotNull]
-        IBasicUnitOfWork Begin([NotNull] UnitOfWorkStartOptions options, bool requiresNew = false);
+        IBasicUnitOfWork Begin([NotNull] UnitOfWorkOptions options, bool requiresNew = false);
 
         [NotNull]
         IBasicUnitOfWork Reserve([NotNull] string reservationName, bool requiresNew = false);
 
-        void BeginReserved([NotNull] string reservationName, [NotNull] UnitOfWorkStartOptions options);
+        void BeginReserved([NotNull] string reservationName, [NotNull] UnitOfWorkOptions options);
 
-        bool TryBeginReserved([NotNull] string reservationName, [NotNull] UnitOfWorkStartOptions options);
+        bool TryBeginReserved([NotNull] string reservationName, [NotNull] UnitOfWorkOptions options);
     }
 }

src/Volo.Abp/Volo/Abp/Uow/IUnitOfWorkOptions.cs

@@ -3,7 +3,7 @@ using System.Data;
 
 namespace Volo.Abp.Uow
 {
-    public interface IUnitOfWorkStartOptions
+    public interface IUnitOfWorkOptions
     {
         bool IsTransactional { get; }
 

src/Volo.Abp/Volo/Abp/Uow/UnitOfWork.cs

@@ -11,7 +11,7 @@ namespace Volo.Abp.Uow
     {
         public Guid Id { get; } = Guid.NewGuid();
 
-        public IUnitOfWorkStartOptions Options { get; private set; }
+        public IUnitOfWorkOptions Options { get; private set; }
 
         public IUnitOfWork Outer { get; private set; }
 
@@ -27,13 +27,13 @@ namespace Volo.Abp.Uow
 
         private readonly Dictionary<string, IDatabaseApi> _databaseApis;
         private readonly Dictionary<string, ITransactionApi> _transactionApis;
-        private readonly UnitOfWorkOptions _defaultOptions;
+        private readonly UnitOfWorkDefaultOptions _defaultOptions;
 
         private Exception _exception;
         private bool _isCompleted;
         private bool _isDisposed;
 
-        public UnitOfWork(IServiceProvider serviceProvider, IOptions<UnitOfWorkOptions> options)
+        public UnitOfWork(IServiceProvider serviceProvider, IOptions<UnitOfWorkDefaultOptions> options)
         {
             ServiceProvider = serviceProvider;
             _defaultOptions = options.Value;
@@ -42,11 +42,13 @@ namespace Volo.Abp.Uow
             _transactionApis = new Dictionary<string, ITransactionApi>();
         }
 
-        public void SetOptions(UnitOfWorkStartOptions options)
+        public void Initialize(UnitOfWorkOptions options)
         {
+            Check.NotNull(options, nameof(options));
+
             if (Options != null)
             {
-                throw new AbpException("Options must be set only once!");
+                throw new AbpException("This unit of work is already initialized before!");
             }
 
             Options = _defaultOptions.Normalize(options.Clone());

src/Volo.Abp/Volo/Abp/Uow/UnitOfWorkAttribute.cs

@@ -37,7 +37,7 @@ namespace Volo.Abp.Uow
         /// </summary>
         public bool IsDisabled { get; set; }
 
-        public virtual void SetOptions(UnitOfWorkStartOptions options)
+        public virtual void SetOptions(UnitOfWorkOptions options)
         {
             if (IsTransactional.HasValue)
             {

src/Volo.Abp/Volo/Abp/Uow/UnitOfWorkDefaultOptions.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Data;
+
+namespace Volo.Abp.Uow
+{
+    //TODO: Implement default options!
+    
+    /// <summary>
+    /// Global (default) unit of work options
+    /// </summary>
+    public class UnitOfWorkDefaultOptions
+    {
+        public UnitOfWorkTransactionBehavior TransactionBehavior { get; set; }
+
+        public IsolationLevel? IsolationLevel { get; set; }
+
+        public TimeSpan? Timeout { get; set; }
+
+        internal UnitOfWorkOptions Normalize(UnitOfWorkOptions options)
+        {
+            if (options.IsolationLevel == null)
+            {
+                options.IsolationLevel = IsolationLevel;
+            }
+
+            if (options.Timeout == null)
+            {
+                options.Timeout = Timeout;
+            }
+
+            return options;
+        }
+    }
+}

src/Volo.Abp/Volo/Abp/Uow/UnitOfWorkManager.cs

@@ -19,7 +19,7 @@ namespace Volo.Abp.Uow
             _ambientUnitOfWork = ambientUnitOfWork;
         }
 
-        public IBasicUnitOfWork Begin(UnitOfWorkStartOptions options, bool requiresNew = false)
+        public IBasicUnitOfWork Begin(UnitOfWorkOptions options, bool requiresNew = false)
         {
             Check.NotNull(options, nameof(options));
 
@@ -29,7 +29,7 @@ namespace Volo.Abp.Uow
             }
 
             var unitOfWork = CreateNewUnitOfWork();
-            unitOfWork.SetOptions(options);
+            unitOfWork.Initialize(options);
 
             return unitOfWork;
         }
@@ -53,7 +53,7 @@ namespace Volo.Abp.Uow
             return unitOfWork;
         }
 
-        public void BeginReserved(string reservationName, UnitOfWorkStartOptions options)
+        public void BeginReserved(string reservationName, UnitOfWorkOptions options)
         {
             if (!TryBeginReserved(reservationName, options))
             {
@@ -61,7 +61,7 @@ namespace Volo.Abp.Uow
             }
         }
 
-        public bool TryBeginReserved(string reservationName, UnitOfWorkStartOptions options)
+        public bool TryBeginReserved(string reservationName, UnitOfWorkOptions options)
         {
             Check.NotNull(reservationName, nameof(reservationName));
 
@@ -79,7 +79,7 @@ namespace Volo.Abp.Uow
             }
 
             uow.IsReserved = false;
-            uow.SetOptions(options);
+            uow.Initialize(options);
 
             return true;
         }

src/Volo.Abp/Volo/Abp/Uow/UnitOfWorkManagerExtensions.cs

@@ -9,7 +9,7 @@ namespace Volo.Abp.Uow
         {
             Check.NotNull(unitOfWorkManager, nameof(unitOfWorkManager));
 
-            return unitOfWorkManager.Begin(new UnitOfWorkStartOptions(), requiresNew);
+            return unitOfWorkManager.Begin(new UnitOfWorkOptions(), requiresNew);
         }
 
         public static void BeginReserved([NotNull] this IUnitOfWorkManager unitOfWorkManager, [NotNull] string reservationName)
@@ -17,7 +17,7 @@ namespace Volo.Abp.Uow
             Check.NotNull(unitOfWorkManager, nameof(unitOfWorkManager));
             Check.NotNull(reservationName, nameof(reservationName));
 
-            unitOfWorkManager.BeginReserved(reservationName, new UnitOfWorkStartOptions());
+            unitOfWorkManager.BeginReserved(reservationName, new UnitOfWorkOptions());
         }
 
         public static void TryBeginReserved([NotNull] this IUnitOfWorkManager unitOfWorkManager, [NotNull] string reservationName)
@@ -25,7 +25,7 @@ namespace Volo.Abp.Uow
             Check.NotNull(unitOfWorkManager, nameof(unitOfWorkManager));
             Check.NotNull(reservationName, nameof(reservationName));
 
-            unitOfWorkManager.TryBeginReserved(reservationName, new UnitOfWorkStartOptions());
+            unitOfWorkManager.TryBeginReserved(reservationName, new UnitOfWorkOptions());
         }
     }
 }

src/Volo.Abp/Volo/Abp/Uow/UnitOfWorkOptions.cs

@@ -3,32 +3,25 @@ using System.Data;
 
 namespace Volo.Abp.Uow
 {
-    //TODO: Implement default options!
-    
+    public class UnitOfWorkOptions : IUnitOfWorkOptions
+    {
         /// <summary>
-    /// Global (default) unit of work options
+        /// Default: false.
         /// </summary>
-    public class UnitOfWorkOptions
-    {
-        public UnitOfWorkTransactionBehavior TransactionBehavior { get; set; }
+        public bool IsTransactional { get; set; }
 
         public IsolationLevel? IsolationLevel { get; set; }
 
         public TimeSpan? Timeout { get; set; }
 
-        internal UnitOfWorkStartOptions Normalize(UnitOfWorkStartOptions options)
-        {
-            if (options.IsolationLevel == null)
+        public UnitOfWorkOptions Clone()
         {
-                options.IsolationLevel = IsolationLevel;
-            }
-
-            if (options.Timeout == null)
+            return new UnitOfWorkOptions
             {
-                options.Timeout = Timeout;
-            }
-
-            return options;
+                IsTransactional = IsTransactional,
+                IsolationLevel = IsolationLevel,
+                Timeout = Timeout
+            };
         }
     }
 }

src/Volo.Abp/Volo/Abp/Uow/UnitOfWorkStartOptions.cs

@@ -1,27 +0,0 @@
-using System;
-using System.Data;
-
-namespace Volo.Abp.Uow
-{
-    public class UnitOfWorkStartOptions : IUnitOfWorkStartOptions
-    {
-        /// <summary>
-        /// Default: false.
-        /// </summary>
-        public bool IsTransactional { get; set; }
-
-        public IsolationLevel? IsolationLevel { get; set; }
-
-        public TimeSpan? Timeout { get; set; }
-
-        public UnitOfWorkStartOptions Clone()
-        {
-            return new UnitOfWorkStartOptions
-            {
-                IsTransactional = IsTransactional,
-                IsolationLevel = IsolationLevel,
-                Timeout = Timeout
-            };
-        }
-    }
-}