Refactor ICommand

Rename DuplicateCommand to ExistingCommand

src/Services/Ordering/Ordering.API/Application/Behaviors/ExistingCommandBehavior.cs

@@ -7,13 +7,13 @@ using Microsoft.Extensions.Logging;
 
 namespace Ordering.API.Infrastructure.Behaviors
 {
-    public class DuplicateCommandBehavior<TCommand, TResponse> : IPipelineBehavior<TCommand, TResponse>
+    public class ExistingCommandBehavior<TCommand, TResponse> : IPipelineBehavior<TCommand, TResponse>
         where TCommand : ICommand
     {
         private readonly IMediator _mediator;
         private readonly IRequestManager _requestManager;
 
-        public DuplicateCommandBehavior(IMediator mediator, IRequestManager requestManager)
+        public ExistingCommandBehavior(IMediator mediator, IRequestManager requestManager)
         {
             _mediator = mediator;
             _requestManager = requestManager;
@@ -24,8 +24,8 @@ namespace Ordering.API.Infrastructure.Behaviors
             var alreadyExists = await _requestManager.ExistAsync(command.CommandId);
             if (alreadyExists)
             {
-                var duplicateCommand = new DuplicateCommandResponse<TCommand, TResponse>.DuplicateCommand<TCommand>(command);
-                return await _mediator.Send(duplicateCommand, cancellationToken);
+                var existingCommand = new ExistingCommandResponse<TCommand, TResponse>.ExistingCommand(command);
+                return await _mediator.Send(existingCommand, cancellationToken);
             }
 
             await _requestManager.CreateRequestForCommandAsync<TCommand>(command.CommandId);

src/Services/Ordering/Ordering.API/Application/Commands/CancelOrderCommand.cs

@@ -8,7 +8,7 @@ using Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands;
 
 namespace Ordering.API.Application.Commands
 {
-    public class CancelOrderCommand : ICommand, IRequest<bool>
+    public class CancelOrderCommand : ICommand<bool>
     {
         public Guid CommandId { get; set; }
 

src/Services/Ordering/Ordering.API/Application/Commands/CancelOrderCommandHandler.cs

@@ -38,9 +38,9 @@ namespace Ordering.API.Application.Commands
 
 
     // Use for Idempotency in Command process
-    public class CancelOrderDuplicateCommand : DuplicateCommandResponse<CancelOrderCommand, bool>
+    public class CancelOrderExistingCommand : ExistingCommandResponse<CancelOrderCommand, bool>
     {
-        protected override Task<bool> CreateResponseForDuplicateCommand(CancelOrderCommand command)
+        protected override Task<bool> CreateResponseForExistingCommand(CancelOrderCommand command)
         {
             // Ignore duplicate requests for processing order.
             return Task.FromResult(true);

src/Services/Ordering/Ordering.API/Application/Commands/CreateOrderCommandHandler.cs

@@ -47,9 +47,9 @@
 
 
     // Use for Idempotency in Command process
-    public class CreateOrderDuplicateCommand : DuplicateCommandResponse<CreateOrderCommand, bool>
+    public class CreateOrderExistingCommand : ExistingCommandResponse<CreateOrderCommand, bool>
     {
-        protected override Task<bool> CreateResponseForDuplicateCommand(CreateOrderCommand command)
+        protected override Task<bool> CreateResponseForExistingCommand(CreateOrderCommand command)
         {
             // Ignore duplicate requests for creating order.
             return Task.FromResult(true);

src/Services/Ordering/Ordering.API/Application/Commands/DuplicateCommandResponse.cs

@@ -1,30 +0,0 @@
-using System.Threading;
-using System.Threading.Tasks;
-using MediatR;
-
-namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
-{
-    public abstract class DuplicateCommandResponse<TCommand, TResponse> : IRequestHandler<DuplicateCommandResponse<TCommand, TResponse>.DuplicateCommand<TCommand>, TResponse>
-    {
-        public class DuplicateCommand<TCommand> : IRequest<TResponse>
-        {
-            public DuplicateCommand(TCommand command)
-            {
-                Command = command;
-            }
-
-            public TCommand Command { get; }
-        }
-
-        /// <summary>
-        /// Creates the result value to return if a previous request was found
-        /// </summary>
-        /// <returns></returns>
-        protected abstract Task<TResponse> CreateResponseForDuplicateCommand(TCommand command);
-
-        Task<TResponse> IRequestHandler<DuplicateCommand<TCommand>, TResponse>.Handle(DuplicateCommand<TCommand> request, CancellationToken cancellationToken)
-        {
-            return CreateResponseForDuplicateCommand(request.Command);
-        }
-    }
-}

src/Services/Ordering/Ordering.API/Application/Commands/ExistingCommandResponse.cs

@@ -0,0 +1,30 @@
+using System.Threading;
+using System.Threading.Tasks;
+using MediatR;
+
+namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
+{
+    public abstract class ExistingCommandResponse<TCommand, TResponse> : IRequestHandler<ExistingCommandResponse<TCommand, TResponse>.ExistingCommand, TResponse>
+    {
+        public class ExistingCommand : IRequest<TResponse>
+        {
+            public ExistingCommand(TCommand command)
+            {
+                Command = command;
+            }
+
+            public TCommand Command { get; }
+        }
+
+        /// <summary>
+        /// Creates the result value to return if a previous request was found
+        /// </summary>
+        /// <returns></returns>
+        protected abstract Task<TResponse> CreateResponseForExistingCommand(TCommand command);
+
+        Task<TResponse> IRequestHandler<ExistingCommand, TResponse>.Handle(ExistingCommand request, CancellationToken cancellationToken)
+        {
+            return CreateResponseForExistingCommand(request.Command);
+        }
+    }
+}

src/Services/Ordering/Ordering.API/Application/Commands/ICommand.cs

@@ -1,4 +1,5 @@
 using System;
+using MediatR;
 
 namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
 {
@@ -6,4 +7,8 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Application.Commands
     {
         Guid CommandId { get; }
     }
+
+    public interface ICommand<out TResponse> : ICommand, IRequest<TResponse>
+    {
+    }
 }

src/Services/Ordering/Ordering.API/Application/Commands/ShipOrderCommandHandler.cs

@@ -38,9 +38,9 @@ namespace Ordering.API.Application.Commands
 
 
     // Use for Idempotency in Command process
-    public class ShipOrderDuplicateCommand : DuplicateCommandResponse<ShipOrderCommand, bool>
+    public class ShipOrderExistingCommand : ExistingCommandResponse<ShipOrderCommand, bool>
     {
-        protected override Task<bool> CreateResponseForDuplicateCommand(ShipOrderCommand command)
+        protected override Task<bool> CreateResponseForExistingCommand(ShipOrderCommand command)
         {
             // Ignore duplicate requests for creating order.
             return Task.FromResult(true);

src/Services/Ordering/Ordering.API/Infrastructure/AutofacModules/MediatorModule.cs

@@ -42,7 +42,7 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.API.Infrastructure.Autof
 
             builder.RegisterGeneric(typeof(LoggingBehavior<,>)).As(typeof(IPipelineBehavior<,>));
             builder.RegisterGeneric(typeof(ValidatorBehavior<,>)).As(typeof(IPipelineBehavior<,>));
-            builder.RegisterGeneric(typeof(DuplicateCommandBehavior<,>)).As(typeof(IPipelineBehavior<,>));
+            builder.RegisterGeneric(typeof(ExistingCommandBehavior<,>)).As(typeof(IPipelineBehavior<,>));
 
         }
     }