private void BuildCommandInvokers(ITypeFinder typeFinder)
{
if (commandInvokers == null)
{
lock (_lock)
{
if (commandInvokers == null)
{
commandInvokers = new Dictionary <Type, CommandHandlerInvoker>();
foreach (var commandHandlerType in typeFinder.GetInterfaceImplementations <IHandleCommands>())
{
foreach (var commandType in GetCommandTypesForCommandHandler(commandHandlerType))
{
if (commandInvokers.ContainsKey(commandType))
{
throw new DuplicateCommandHandlersException(commandType);
}
commandInvokers.Add(commandType, new CommandHandlerInvoker(commandType, commandHandlerType));
}
}
}
}
}
}