public HubInvokeMessage(string operationId, string method, HubMethodDefinition methodDefinition, object[] arguments)
{
OperationId = operationId ?? throw new ArgumentNullException(nameof(operationId));
Method = method ?? throw new ArgumentNullException(nameof(method));
MethodDefinition = methodDefinition ?? throw new ArgumentNullException(nameof(methodDefinition));
Arguments = arguments ?? throw new ArgumentNullException(nameof(arguments));
}
private static Func <T, HubInvokeMessage, ValueTask <HubInvocationResult> > GetInvokerCore(HubMethodDefinition methodDefinition)
{
var returnType = methodDefinition.ReturnType;
if (returnType == typeof(Task))
{
return(InvokeCoreTaskAsync);
}
else if (returnType == typeof(ValueTask))
{
return(InvokeCoreValueTaskAsync);
}
else if (returnType.IsGenericType)
{
var openGenericType = returnType.GetGenericTypeDefinition();
var actualReturnType = returnType.GetGenericArguments()[0];
if (openGenericType == typeof(Task <>) || openGenericType == typeof(ValueTask <>))
{
Expression <Func <T, HubInvokeMessage, ValueTask <HubInvocationResult> > > expression = (instance, invokeMessage) => default;
var methodCore = openGenericType == typeof(Task <>) ? _methodInfoInvokeCoreTaskAsync : _methodInfoInvokeCoreValueTaskAsync;
expression = expression.Update(
Expression.Call(null, methodCore.MakeGenericMethod(actualReturnType), expression.Parameters),
expression.Parameters
);
return(expression.Compile());
}
}
return(InvokeCore);
}
public static Func <object, HubInvokeMessage, ValueTask <HubInvocationResult> > GetInvoker(HubMethodDefinition methodDefinition)
{
var func = GetInvokerCore(methodDefinition);
return((instance, invokeMessage) => func((T)instance, invokeMessage));
}