Question

所有这一切的要点是运行一个单独的线程（可以是类似的东西：任务，操作）并记录“开始”和“结束”，最好是最小化代码影响（更改）和记录对代码透明，只使用不同的类。

最近，我决定从类System.Threading.Thread继承，作为实现“Thread x started”等内容的日志记录的方法。和“线程x结束。”到一个文件，用于调试。由于类是密封的，我使用组合将Thread添加为成员并调用各自的函数，访问器和所有必需的。我有一个简单的想法，如何做到这一点，我想像

namespace MyNamespace
{
    class Thread
    {
        private System.Threading.Thread thread;

        //wrap constructor properties methods...
        //...

        public void Start()
        {
                log(thread.name + " start.");
                thread.Start();
                log(thread.name + " end.");
        }

        //...
    }
}

现在解决了包装现有功能的所有麻烦（并使用新的命名空间而不是System.Threading）...这个结果是不好的，因为这个调用如果我没有误会是来自调用< / strong>线程和第二个“结束”不记录。日志记录主要用于调试并具有发生的非易失性状态。

编辑：

这是使用Ahmed的答案的简化代码，这很好，但仍然存在的问题是如果SimulatedThread抛出异常，“Ending ...”不会记录“MainThread”或“CustomThread” ”。如果CustomThread异常终止，则应记录“MainThread”和“CustomThread”的“Ending ...”。（异常处理不相关）。 “MainThread”应该来自“CustomThread”。

全面实施

using System; using System.Security; using System.Threading; namespace CS_Tests_Console { class Program { static void Main(string[] args) { Logger.Log("Starting..."); try { Thread.CurrentThread.Name = "MainThread"; CustomThread thread = new CustomThread(SimulateThread) { Name = "CustomThread", }; thread.Start(); thread.Join(); } catch (Exception ex) { Logger.Log("Cought exception:" + ex.ToString()); } Logger.Log("Ending..."); } private static void SimulateThread() { Logger.Log("Running..."); Thread.Sleep(2000); throw new Exception("Test Exception"); } } public static class Logger { public static void Log(String message) { if (Thread.CurrentThread.Name == null) { Console.WriteLine(Thread.CurrentThread.ManagedThreadId + " Thread.CurrentThread.Name is NULL -> " + message); } else { Console.WriteLine(Thread.CurrentThread.ManagedThreadId + " " + Thread.CurrentThread.Name + " -> " + message); } } } public class CustomThread { public Thread threadInstance { get; private set; } public CustomThread(ThreadStart threadStart) { threadInstance = new Thread(() => { Logger.Log("Starting..."); threadStart(); Logger.Log("Ending..."); }); } public string Name { get { return threadInstance.Name; } set { threadInstance.Name = value; } } [SecuritySafeCritical] public void Join() { threadInstance.Join(); } public void Start() { threadInstance.Start(); } } }

Answer 1

封装ThreadStart委托中的日志记录：

public class Logger{
    public void Log(String message){
        Console.WriteLine(message);
    }
}

public class CustomThread {
    public Thread ThreadInst { get; private set; }
    public Logger logger = new Logger();
    public CustomThread(ThreadStart threadStart) {
        ThreadInst = new Thread(() =>
        {
            logger.Log(Thread.CurrentThread.Name + " Starting...");
            threadStart();
            logger.Log(Thread.CurrentThread.Name + " Ending...");
        });
    }
    public void Start() { ThreadInst.Start(); }
}
class Program
{

    static void Main(string[] args)
    {
        new CustomThread(() => Thread.Sleep(2000)).Start();
    }
}

编辑：添加了捕获和记录异常：

    public CustomThread(ThreadStart threadStart) {
        ThreadInst = new Thread(() =>
        {
            logger.Log(Thread.CurrentThread.Name + " Starting...");
            try {
                threadStart();
            } catch (Exception ex) {
                logger.Log("Error in thread" + Thread.CurrentThread.Name + " " + ex.Message);
            }
            logger.Log(Thread.CurrentThread.Name + " Ending...");
        });
    }

Thread / Task / Action /之前和之后的透明代码执行

1 个答案: