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  • AsyncLocal<T>与ThreadLocal<T>区别研究

    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()
            {
                return Task.Run<int>(() =>
                {
                    Console.WriteLine("awaitFunction:" + GuidFactory.CurrentGuid);
                    return 0;
                });
            } 
    
            private async void asyncFunction()
            {
                Console.WriteLine("asyncFunction:" + GuidFactory.CurrentGuid);
                int num = await awaitFunction();
                Console.WriteLine("asyncFunction:" + GuidFactory.CurrentGuid);
            }
    
            public APP()
            {
                asyncFunction();
                asyncFunction();
    
                while (true)
                {
                    Thread.Sleep(1000);
                }
            }
        }
    
        class Program
        {
            static void Main(string[] args)
            {
                APP App = new APP();
            }
        }
    }

        /// <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;
                }
            }
        }

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  • 原文地址:https://www.cnblogs.com/jimaojin/p/7472716.html
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