База для нового бэкэнда

Example.Backend/CsTest.cs

@@ -0,0 +1,18 @@
+using System;
+using Example.Shared;
+
+namespace Example.Backend
+{
+    public class CsTest
+    {
+        public T FinalCasted<T>(IDataList<T> list, int index)
+        {
+            return list.Get(index);
+        }
+
+        public object NonCasted(object list, int index)
+        {
+            return FinalCasted(list as IDataList<object>, index);
+        }
+    }
+}

Example.Backend/PagesList.cs

@@ -0,0 +1,24 @@
+using System.Collections.Generic;
+using Example.Shared;
+
+namespace Example.Backend
+{
+    public class PagesList : IPagesList
+    {
+        public IReadOnlyList<IPage> Collection { get; }
+        public IPage Get(int index)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public void Add(IPage item)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public void Set(int index, IPage item)
+        {
+            throw new System.NotImplementedException();
+        }
+    }
+}

Example.Backend/Program.cs

@@ -1,5 +1,6 @@
 using System.Net;
 using Example.Backend;
+using Example.Shared;
 using mROA.Abstract;
 using mROA.Cbor;
 using mROA.Codegen;
@@ -48,5 +49,6 @@ class Program
         var gateway = builder.GetModule<IGatewayModule>();
 
         gateway.Run();
+        
     }
 }

Example.Frontend/ClientBasedPrinter.cs

@@ -11,6 +11,7 @@ namespace Example.Frontend
         public string GetName()
         {
             Console.WriteLine("ClientBasedPrinter called from server!!!!!!!!!!! Vova likes that:)");
+            
             return "ClientBasedPrinter from mroa";
         }
 

Example.Frontend/Program.cs

@@ -17,7 +17,7 @@ class Program
     public static void Main(string[] args)
     {
         var builder = new FullMixBuilder();
-        new RemoteTypeBinder();
+        // new RemoteTypeBinder();
         // builder.Modules.Add(new JsonSerializationToolkit());
         builder.Modules.Add(new CborSerializationToolkit());
 
@@ -106,5 +106,7 @@ class Program
         // Console.WriteLine("X is {0}", x);
         // Console.WriteLine("Time : {0}", timer.Elapsed.TotalMilliseconds);
         // Console.WriteLine($"Time per call: {timer.Elapsed.TotalMilliseconds / iterations} ms");
+
+
     }
 }

Example.Shared/IDataList.cs

@@ -1,12 +1,15 @@
+using System;
+using System.Collections.Generic;
+using mROA.Implementation;
 using mROA.Implementation.Attributes;
 
 namespace Example.Shared
 {
-    // [SharedObjectInterface]
+    public interface IDataList<T> : IShared, IDisposable
-    // public interface IDataList<T> : IShared
+    {
-    // {
+        IReadOnlyList<T> Collection { get; }
-    //     T Get(int index);
+        T Get(int index);
-    //     void Add(T item);
+        void Add(T item);
-    //     void Set(int index, T item);
+        void Set(int index, T item);
-    // }
+    }
 }

Example.Shared/IPagesList.cs

@@ -0,0 +1,9 @@
+using mROA.Implementation.Attributes;
+
+namespace Example.Shared
+{
+    [SharedObjectInterface]
+    public interface IPagesList : IDataList<IPage>
+    {
+    }
+}

mROA.Cbor/CborSerializationToolkit.cs

@@ -52,8 +52,11 @@ namespace mROA.Cbor
             return (T)Cast(nonCasted, typeof(T), context);
         }
 
-        public object Cast(object nonCasted, Type type, IEndPointContext? context)
+        public object? Cast(object? nonCasted, Type type, IEndPointContext? context)
         {
+            if (nonCasted == null)
+                return null;
+            
             if (nonCasted.GetType() == type)
                 return nonCasted;
 

mROA.Codegen/mROASourceGenerator.cs

@@ -17,74 +17,57 @@ namespace mROA.Codegen
     [Generator]
     public class mROASourceGenerator : ISourceGenerator
     {
-        private const string Namespace = "mROA.Implementation";
-        private const string AttributeName = "SharedObjectInterafceAttribute";
-
-        private const string AttributeSourceCode = $@"// <auto-generated/>
-
-namespace {Namespace}
-{{
-    [System.AttributeUsage(System.AttributeTargets.Class)]
-    public class {AttributeName} : System.Attribute
-    {{
-    }}
-}}";
-
-        /// <summary>
-        /// Generate code action.
-        /// It will be executed on specific nodes (ClassDeclarationSyntax annotated with the [Report] attribute) changed by the user.
-        /// </summary>
-        /// <param name="context">Source generation context used to add source files.</param>
-        /// <param name="compilation">Compilation used to provide access to the Semantic Model.</param>
-        /// <param name="classes">Nodes annotated with the [Report] attribute that trigger the generate action.</param>
         private void GenerateCode(GeneratorExecutionContext context, Compilation compilation,
             ImmutableArray<InterfaceDeclarationSyntax> classes)
         {
             var methods = new List<(string, IMethodSymbol)>();
             var frontendContextRepo = new List<string>();
-            // Go through all filtered class declarations.
+
             var declarations = classes.ToList().OrderBy(i => i.Identifier.Text).ToList();
             foreach (var classDeclarationSyntax in declarations)
-            {
+            { 
-                // We need to get semantic model of the class to retrieve metadata.
                 var semanticModel = compilation.GetSemanticModel(classDeclarationSyntax.SyntaxTree);
 
-
-                // Symbols allow us to get the compile-time information.
                 if (semanticModel.GetDeclaredSymbol(classDeclarationSyntax) is not INamedTypeSymbol classSymbol)
                     continue;
-
+                
-
                 var namespaceName = classSymbol.ContainingNamespace.ToDisplayString();
-
-                
-                
-                // 'Identifier' means the token of the node. Get class name from the syntax node.
                 var className = classDeclarationSyntax.Identifier.Text;
-
+                var methodBody = CollectMethods(classSymbol);
-                // Go through all class members with a particular type (property) to generate method lines.
+                
-                var methodBody = classSymbol.GetMembers()
-                    .OfType<IMethodSymbol>().OrderBy(i => i.Name);
-
                 var originalName = className;
-                // Build up the source code
+                
                 className = className.TrimStart('I') + "RemoteEndpoint";
 
-
                 var methodsText = new List<string>();
-                
+
                 foreach (var method in methodBody)
                 {
                     var index = methods.Count;
                     methods.Add((namespaceName + "." + originalName, method));
                     var sb = new StringBuilder();
+                    
+                    bool isParametrized;
 
-                    bool isAsync = method.ReturnType.Name == "Task";
+                    bool isAsync;
-                    bool isVoid = method.ReturnType.Name == "Void" ||
+                    bool isVoid;
-                                  method.ReturnType.ToString() == "System.Threading.Tasks.Task";
-                    bool isParametrized = method.Parameters.Length == 1 && !isAsync ||
-                                          method.Parameters.Length == 2 && isAsync;
 
+                    switch (method.ReturnType)
+                    {
+                        case INamedTypeSymbol namedType:
+                            isAsync = namedType.Name == "Task";
+                            isVoid = isAsync && namedType.TypeParameters.Length == 0 || namedType.Name == "Void";
+                            isParametrized  = method.Parameters.Length == 1 && !isAsync ||
+                                              method.Parameters.Length == 2 && isAsync;
+                            break;
+                        case IArrayTypeSymbol:
+                            isAsync = false;
+                            isVoid = false;
+                            isParametrized = method.Parameters.Length != 0;
+                            break;
+                        default:
+                            continue;
+                    }
 
                     //Creating signature
                     sb.AppendLine("public" + (isAsync
@@ -140,7 +123,7 @@ namespace {namespaceName}
 
 
                 // Add the source code to the compilation.
-                context.AddSource($"{className}.g.cs", SourceText.From(code, Encoding.UTF8));
+                // context.AddSource($"{className}.g.cs", SourceText.From(code, Encoding.UTF8));
 
                 frontendContextRepo.Add(
                     $"{{ typeof({classSymbol.ToDisplayString()}), typeof({namespaceName}.{className}) }}");
@@ -148,31 +131,27 @@ namespace {namespaceName}
 
             if (methods.Count != 0)
             {
-                // var methodsStringed = methods.Select(i =>
+                var methodsStringed = Array.Empty<string>();
-                //         $"typeof({i.Item1}).GetMethod(\"{i.Item2.Name}\", new Type[] {{{string.Join(", ", i.Item2.Parameters.Select(p => $"typeof({p.Type.ToDisplayString()})"))}}})")
-                //     .ToList();
-                var methodsStringed = methods.Select(i =>
-                        $"typeof({i.Item1}).GetMethod(\"{i.Item2.Name}\")")
-                    .ToList();
 
                 var coCodegenRepoCode = @$"// <auto-generated/>
 using System.Collections.Generic;
 using System.Reflection;
 using mROA.Abstract;
+using mROA.Implementation;
 using System;
 
 namespace mROA.Codegen
 {{
     public class CoCodegenMethodRepository : IMethodRepository
     {{
-        private readonly List<MethodInfo> _methods = new () {{
+        private readonly List<IMethodInvoker> _methods = new () {{
             {string.Join(",\r\n\t\t\t", methodsStringed)}
         }};
 
-        public MethodInfo GetMethod(int id)
+        public IMethodInvoker GetMethod(int id)
         {{
             if (id == -1)
-                return typeof(IDisposable).GetMethod(""Dispose"");
+                return mROA.Implementation.MethodInvoker.Dispose;
 
             if (_methods.Count <= id)
                 return null;
@@ -186,7 +165,7 @@ namespace mROA.Codegen
     }}
 }}
 ";
-                context.AddSource($"CoCodegenMethodRepository.g.cs", SourceText.From(coCodegenRepoCode, Encoding.UTF8));
+                context.AddSource("CoCodegenMethodRepository.g.cs", SourceText.From(coCodegenRepoCode, Encoding.UTF8));
             }
 
             if (frontendContextRepo.Count != 0)
@@ -209,7 +188,7 @@ namespace mROA.Codegen
     }}
 }}
 ";
-                context.AddSource("RemoteTypeBinder.g.cs", SourceText.From(fronendRepoCode, Encoding.UTF8));
+                // context.AddSource("RemoteTypeBinder.g.cs", SourceText.From(fronendRepoCode, Encoding.UTF8));
             }
         }
 
@@ -225,9 +204,7 @@ namespace mROA.Codegen
 
         private string ExtractTaskType(ITypeSymbol taskType)
         {
-            var type = taskType.ToString();
+            return (taskType as INamedTypeSymbol).TypeParameters[0].ToDisplayString();
-            type = type.Substring(type.IndexOf('<') + 1);
-            return type.Substring(0, type.Length - 1);
         }
 
         public void Initialize(GeneratorInitializationContext context)
@@ -266,8 +243,7 @@ namespace mROA.Codegen
         private bool ContainsSOIAttribute(SyntaxList<AttributeListSyntax> attributes, GeneratorExecutionContext context,
             InterfaceDeclarationSyntax interfaceDeclarationSyntax)
         {
-            foreach (AttributeListSyntax attributeListSyntax in attributes)
+            foreach (var attributeSyntax in attributes.SelectMany(attributeListSyntax => attributeListSyntax.Attributes))
-            foreach (AttributeSyntax attributeSyntax in attributeListSyntax.Attributes)
             {
                 if (context.Compilation.GetSemanticModel(interfaceDeclarationSyntax.SyntaxTree)
                         .GetSymbolInfo(attributeSyntax).Symbol is not IMethodSymbol attributeSymbol)
@@ -282,5 +258,16 @@ namespace mROA.Codegen
 
             return false;
         }
+
+        private List<IMethodSymbol> CollectMethods(INamedTypeSymbol type)
+        {
+            var methods = type.GetMembers().OfType<IMethodSymbol>().ToList();
+            foreach (var inner in type.AllInterfaces)
+            {
+                methods.AddRange(inner.GetMembers().OfType<IMethodSymbol>());
+            }
+
+            return methods.OrderBy(i => i.Name).ToList();
+        }
     }
 }

mROA/Abstract/IMethodInvoker.cs

@@ -8,6 +8,7 @@ namespace mROA.Abstract
         bool IsVoid { get; }
         Type[] ParameterTypes { get; }
         Type? ReturnType { get; }
-        object? Invoke(object instance, object?[] parameters, object[] special);
+        object? Invoke(object instance, object?[]? parameters, object[] special);
+        Type SuitableType { get; } 
     }
 }

mROA/Abstract/IMethodRepository.cs

@@ -4,6 +4,6 @@ namespace mROA.Abstract
 {
     public interface IMethodRepository : IInjectableModule
     {
-        MethodInfo GetMethod(int id);
+        IMethodInvoker GetMethod(int id);
     }
 }

mROA/Abstract/ISerializationToolkit.cs

@@ -10,8 +10,8 @@ namespace mROA.Abstract
         object? Deserialize(byte[] rawData, Type type);
         T? Deserialize<T>(Span<byte> rawData);
         object? Deserialize(Span<byte> rawData, Type type);
-        T? Cast<T>(object nonCasted);
+        T? Cast<T>(object? nonCasted);
-        object? Cast(object nonCasted, Type type);
+        object? Cast(object? nonCasted, Type type);
 
     }
 }

mROA/Implementation/Backend/BasicExecutionModule.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Reflection;
 using System.Threading;
 using System.Threading.Tasks;
@@ -11,11 +12,22 @@ namespace mROA.Implementation.Backend
     {
         private IMethodRepository? _methodRepo;
         private ICancellationRepository? _cancellationRepo;
+        private ISerializationToolkit? _serialization;
 
         public void Inject<T>(T dependency)
         {
-            if (dependency is IMethodRepository methodRepo) _methodRepo = methodRepo;
+            switch (dependency)
-            if (dependency is ICancellationRepository cancellationRepo) _cancellationRepo = cancellationRepo;
+            {
+                case IMethodRepository methodRepo:
+                    _methodRepo = methodRepo;
+                    break;
+                case ICancellationRepository cancellationRepo:
+                    _cancellationRepo = cancellationRepo;
+                    break;
+                case ISerializationToolkit serializationToolkit:
+                    _serialization = serializationToolkit;
+                    break;
+            }
         }
 
         public ICommandExecution Execute(ICallRequest command, IContextRepository contextRepository,
@@ -24,50 +36,69 @@ namespace mROA.Implementation.Backend
 #if TRACE
             Console.WriteLine(command.GetType().Name);
 #endif
-            if (_cancellationRepo is null)
-                throw new NullReferenceException("Method repository was not defined");
-
-            if (_methodRepo is null)
-                throw new NullReferenceException("Method repository was not defined");
-
-            if (contextRepository is null)
-                throw new NullReferenceException("Context repository was not defined");
-
-            if (command is CancelRequest)
-            {
-#if TRACE
-                Console.WriteLine("Final cancelling request");
-#endif
-                var cts = _cancellationRepo.GetCancellation(command.Id);
-                cts.Cancel();
-                _cancellationRepo.FreeCancelation(command.Id);
-                return new FinalCommandExecution
-                {
-                    Id = command.Id
-                };
-            }
-
-            var currentCommand = _methodRepo.GetMethod(command.CommandId);
-            if (currentCommand == null)
-                throw new Exception($"Command {command.CommandId} not found");
-
-            var context = command.ObjectId != -1
-                ? contextRepository.GetObject<object>(command.ObjectId)
-                : contextRepository.GetSingleObject(currentCommand.DeclaringType!);
-            var parameter = command.Parameter;
-
-            if (currentCommand.ReturnType.BaseType == typeof(Task) &&
-                currentCommand.ReturnType.GenericTypeArguments.Length == 1)
-                return TypedExecuteAsync(currentCommand, context, parameter, command, _cancellationRepo,
-                    representationModule);
-
-            if (currentCommand.ReturnType == typeof(Task))
-                return ExecuteAsync(currentCommand, context, parameter, command, _cancellationRepo,
-                    representationModule);
 
             try
             {
-                var result = Execute(currentCommand, context, parameter, command);
+                if (_cancellationRepo is null)
+                    throw new NullReferenceException("Method repository was not defined");
+
+                if (_methodRepo is null)
+                    throw new NullReferenceException("Method repository was not defined");
+
+                if (contextRepository is null)
+                    throw new NullReferenceException("Context repository was not defined");
+
+                if (command is CancelRequest)
+                {
+#if TRACE
+                Console.WriteLine("Final cancelling request");
+#endif
+                    var cts = _cancellationRepo.GetCancellation(command.Id);
+                    if (cts == null)
+                        throw new NullReferenceException("Can't find cancellation for this request");
+                    cts.Cancel();
+                    _cancellationRepo.FreeCancelation(command.Id);
+                    
+                    return new FinalCommandExecution
+                    {
+                        Id = command.Id
+                    };
+                }
+
+                var invoker = _methodRepo.GetMethod(command.CommandId);
+                if (invoker == null)
+                    throw new Exception($"Command {command.CommandId} not found");
+
+                var context = command.ObjectId != -1
+                    ? contextRepository.GetObject<object>(command.ObjectId)
+                    : contextRepository.GetSingleObject(invoker.SuitableType);
+
+                if (context == null)
+                    throw new NullReferenceException("Instance can't be null");
+                
+
+                object?[]? castedParams = null;
+
+                if (invoker.ParameterTypes != Type.EmptyTypes)
+                {
+                    castedParams = new object[invoker.ParameterTypes.Length];
+                    for (int i = 0; i < castedParams.Length; i++)
+                    {
+                        castedParams[i] = _serialization.Cast(command.Parameters![i], invoker.ParameterTypes[i]);
+                    }
+                }
+                
+                var execContext = new RequestContext(command.Id, representationModule.Id);
+
+                if (invoker is { IsAsync: true, IsVoid: false })
+                    return TypedExecuteAsync(invoker, context, castedParams, command, _cancellationRepo,
+                        representationModule, execContext);
+
+                if (invoker.IsAsync)
+                    return ExecuteAsync(invoker, context, castedParams, command, _cancellationRepo,
+                        representationModule, execContext);
+
+                var result = Execute(invoker, context, castedParams, command, execContext);
                 if (command.CommandId == -1)
                 {
 #if TRACE
@@ -80,23 +111,22 @@ namespace mROA.Implementation.Backend
             }
             catch (Exception e)
             {
-                Console.WriteLine(e);
+                return new ExceptionCommandExecution
-                throw;
+                {
+                    Id = command.Id,
+                    Exception = e.ToString()
+                };
             }
         }
 
-        private static ICommandExecution Execute(MethodInfo currentCommand, object context, object? parameter,
+        private static ICommandExecution Execute(IMethodInvoker invoker, object instance, object?[] parameter,
-            ICallRequest command)
+            ICallRequest command, RequestContext executionContext)
         {
             try
             {
-                var finalParameter = parameter is null
+                var finalResult = invoker.Invoke(instance, parameter, new object[] { executionContext });
-                    ? Array.Empty<object>()
-                    : new[]
-                        { parameter };
-                var finalResult = currentCommand.Invoke(context, finalParameter);
 
-                if (currentCommand.ReturnType.Name == "Void")
+                if (invoker.IsVoid)
                 {
                     return new FinalCommandExecution
                     {
@@ -120,9 +150,9 @@ namespace mROA.Implementation.Backend
             }
         }
 
-        private ICommandExecution ExecuteAsync(MethodInfo currentCommand, object context, object? parameter,
+        private ICommandExecution ExecuteAsync(IMethodInvoker invoker, object instance, object?[]? parameters,
             ICallRequest command, ICancellationRepository cancellationRepository,
-            IRepresentationModule representationModule)
+            IRepresentationModule representationModule, RequestContext executionContext)
         {
             var tokenSource = new CancellationTokenSource();
             cancellationRepository.RegisterCancellation(command.Id, tokenSource);
@@ -132,11 +162,7 @@ namespace mROA.Implementation.Backend
 #endif
             try
             {
-                var finalParameter = parameter is null
+                var result = (Task)invoker.Invoke(instance, parameters, new object[] { executionContext, token })!;
-                    ? new object[] { token }
-                    : new[]
-                        { parameter, token };
-                var result = (Task)currentCommand.Invoke(context, finalParameter)!;
 
 
                 result.ContinueWith(_ =>
@@ -173,9 +199,9 @@ namespace mROA.Implementation.Backend
             }
         }
 
-        private ICommandExecution TypedExecuteAsync(MethodInfo currentCommand, object context, object? parameter,
+        private ICommandExecution TypedExecuteAsync(IMethodInvoker invoker, object instance, object?[]? parameters,
             ICallRequest command, ICancellationRepository cancellationRepository,
-            IRepresentationModule representationModule)
+            IRepresentationModule representationModule, RequestContext executionContext)
         {
             var tokenSource = new CancellationTokenSource();
             cancellationRepository.RegisterCancellation(command.Id, tokenSource);
@@ -183,12 +209,8 @@ namespace mROA.Implementation.Backend
             var token = tokenSource.Token;
             try
             {
-                var finalParameter = parameter is null
-                    ? new object[] { token }
-                    : new[]
-                        { parameter, token };
                 var result =
-                    (Task)currentCommand.Invoke(context, finalParameter)!;
+                    (Task)invoker.Invoke(instance, parameters, new object[] { executionContext, token })!;
 
                 result.ContinueWith(t =>
                 {
@@ -198,7 +220,7 @@ namespace mROA.Implementation.Backend
                         Id = command.Id,
                         Result = finalResult
                     };
-                    _cancellationRepo.FreeCancelation(command.Id);
+                    _cancellationRepo!.FreeCancelation(command.Id);
 
                     var multiClientOwnershipRepository =
                         TransmissionConfig.OwnershipRepository as MultiClientOwnershipRepository;

mROA/Implementation/CallRequest.cs

@@ -11,7 +11,7 @@ namespace mROA.Implementation
         Guid Id { get; }
         int CommandId { get; }
         int ObjectId { get; }
-        object? Parameter { get; }
+        object?[]? Parameters { get; }
     }
 
     public class DefaultCallRequest : ICallRequest
@@ -20,7 +20,7 @@ namespace mROA.Implementation
         public int CommandId { get; set; }
         public int ObjectId { get; set; } = -1;
 
-        public object? Parameter { get; set; }
+        public object?[]? Parameters { get; set; }
         public override string ToString()
         {
             return $"Call request {{ Id : {Id}, CommandId : {CommandId}, ObjectId : {ObjectId} }}";
@@ -32,7 +32,7 @@ namespace mROA.Implementation
         public Guid Id { get; set; }
         public int CommandId { get; set; } = -2;
         public int ObjectId { get; set; } = -2;
-        public object? Parameter { get; set; } = null;
+        public object?[]? Parameters { get; set; } = null;
         public override string ToString()
         {
             return $"Cancel request {{ Id : {Id}, CommandId : {CommandId}, ObjectId : {ObjectId} }}";

mROA/Implementation/Frontend/RequestExtractor.cs

@@ -94,15 +94,6 @@ namespace mROA.Implementation.Frontend
                         tokenSource.Cancel();
                         var request = defaultRequest.Result;
 
-                        if (request.Parameter is not null)
-                        {
-                            var method = _methodRepository!.GetMethod(request.CommandId);
-                            var parameterType = method.GetParameters().First()
-                                .ParameterType;
-
-                            request.Parameter = _serializationToolkit.Cast(request.Parameter, parameterType);
-                        }
-
                         var result = _executeModule.Execute(request, _contextRepository, _representationModule);
 
                         var resultType = MessageType.Unknown;

mROA/Implementation/MethodInvoker.cs

@@ -9,23 +9,26 @@ namespace mROA.Implementation
         public bool IsVoid { get; set; }
         public Type[] ParameterTypes { get; set; } = Type.EmptyTypes;
         public Type? ReturnType { get; set; }
-        public Func<object, object?[], object[], object?> Invoking { get; set; }
+        public Func<object, object?[]?, object[], object?> Invoking { get; set; } = (_, _, _) => null; 
 
-        public object? Invoke(object instance, object?[] parameters, object[] special)
+        public object? Invoke(object instance, object?[]? parameters, object[] special)
         {
             return Invoking(instance, parameters, special);
         }
 
-        public static MethodInvoker Dispose = new MethodInvoker
+        public Type SuitableType { get; set; } = null!;
+        
+        public static readonly IMethodInvoker Dispose = new MethodInvoker
         {
             IsAsync = false,
             IsVoid = true,
             ReturnType = null,
-            Invoking = ((instance, parameters, special) =>
+            Invoking = (instance, _, _) =>
             {
                 (instance as IDisposable)?.Dispose();
                 return null;
-            })
+            },
+            SuitableType = typeof(IDisposable)
         };
     }
 }

mROA/Implementation/RemoteObjectBase.cs

@@ -22,11 +22,11 @@ namespace mROA.Implementation
         public int Id => _identifier.ContextId;
         public int OwnerId => _identifier.OwnerId;
         public UniversalObjectIdentifier Identifier => _identifier;
-        protected async Task<T> GetResultAsync<T>(int methodId, object? parameter = default,
+        protected async Task<T> GetResultAsync<T>(int methodId, object?[]? parameters = null,
             CancellationToken cancellationToken = default)
         {
             var request = new DefaultCallRequest
-                { CommandId = methodId, ObjectId = _identifier.ContextId, Parameter = parameter
+                { CommandId = methodId, ObjectId = _identifier.ContextId, Parameters = parameters
                 };
             
             await _representationModule.PostCallMessageAsync(request.Id, MessageType.CallRequest, request);
@@ -76,11 +76,11 @@ namespace mROA.Implementation
             throw errorResponse.Result.GetException();
         }
 
-        protected async Task CallAsync(int methodId, object? parameter = default,
+        protected async Task CallAsync(int methodId, object?[]? parameters = null,
             CancellationToken cancellationToken = default)
         {
             var request = new DefaultCallRequest
-                { CommandId = methodId, ObjectId = _identifier.ContextId, Parameter = parameter
+                { CommandId = methodId, ObjectId = _identifier.ContextId, Parameters = parameters
                 };
             await _representationModule.PostCallMessageAsync(request.Id, MessageType.CallRequest, request);
 

mROA/Implementation/RequestContext.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace mROA.Implementation
+{
+    public sealed class RequestContext
+    {
+        public int OwnerId { get; }
+        public Guid RequestId { get; }
+
+        public RequestContext(Guid requestId, int ownerId)
+        {
+            RequestId = requestId;
+            OwnerId = ownerId;
+        }
+    }
+}