MEF - POC

MEF - POC for Dependency Injection


    interface ILogger
    {
        void Write(string messgae);

    }

 class hostMEFApplication
    {

        [ImportMany]

       
        protected IEnumerable<ILogger> Logger { get; set; }

        public void run()
        {
            Compose();
            foreach(var log in Logger)
            log.Write("Hello World from MEF");
        }

        private void Compose()
        {
            var catalog = new AssemblyCatalog(GetType().Assembly);

            var container = new CompositionContainer(catalog);
            container.ComposeParts(this);
        }
    }

 [Export(typeof(ILogger))]
    class ConsoleLogger : ILogger
    {
        public void Write(string message)
        {
            Console.WriteLine("ConsoleLogger says" + message);
        }

    }


    [Export(typeof(ILogger))]
    class SomeOtherLogger : ILogger
    {
        public void Write(string message)
        {
            Console.WriteLine("SomeOtherLogger says" + message);
        }
    }



class Program
    {
        static void Main(string[] args)
        {
  
            var host = new hostMEFApplication();
            host.run();

            Console.ReadLine();


        }
    }