using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace ATLearn

{

    /// <summary>

    /// Guid工厂

    /// </summary>

    static class GuidFactory

    {

        //private static ThreadLocal<string> _localGuid = new ThreadLocal<string>();

        private static AsyncLocal<string> _localGuid = new AsyncLocal<string>();

        public static string CurrentGuid

        {

            get

            {

                if (_localGuid.Value == null)

                {

                    _localGuid.Value = Guid.NewGuid().ToString();

                }

                return _localGuid.Value;

            }

        }

    }

    class APP

    {

        private Task<int> awaitFunction(int taskId)

        {

            return Task.Factory.StartNew((obj) =>

            {

                int itaskId = (int)obj;

                Console.WriteLine(string.Format("taskId: {0} Await! threadId: {1} Guid: {2}", taskId, Thread.CurrentThread.ManagedThreadId, GuidFactory.CurrentGuid));

                Thread.Sleep();

                return itaskId;

            }, (object)taskId);

        } 

        private async void asyncFunction(int taskId)

        {

            Console.WriteLine(string.Format("taskId: {0} Start! threadId: {1} Guid: {2}", taskId, Thread.CurrentThread.ManagedThreadId, GuidFactory.CurrentGuid));

            int num = await awaitFunction(taskId);

            Console.WriteLine(string.Format("taskId：{0} End! threadId: {1} Guid: {2}", taskId, Thread.CurrentThread.ManagedThreadId, GuidFactory.CurrentGuid));

        }

        public APP()

        {

            for (int i = ; i <= ; ++i)

            {

                asyncFunction(i);

            }

            while (true)

            {

                Thread.Sleep();

            }

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            APP App = new APP();

        }

    }

}