文件读写冲突的解决办法:ReaderWriterLock

项目中碰到了静态页文件读写冲突的问题（如果同时存在读写就报黄页，虽然写入是“瞬间”的，但高并发下依然有可能）。

 

    public class ReaderWriterLockHelper
    {
        static ReaderWriterLock rwl = new ReaderWriterLock();

        public static void ReadFromResource(int timeOut, Action readAction)
        {
            try
            {
                rwl.AcquireReaderLock(timeOut);
                try
                {
                    readAction();
                }
                finally
                {
                    rwl.ReleaseReaderLock();
                }
            }
            catch (ApplicationException)
            {
            }
        }

        public static void WriteToResource(int timeOut, Action writeAction)
        {
            try
            {
                rwl.AcquireWriterLock(timeOut);
                try
                {
                    writeAction();
                }
                finally
                {
                    rwl.ReleaseWriterLock();
                }
            }
            catch (ApplicationException)
            {
            }
        }
    }

 

写入：

var thread = new Thread(context =>
{
    HttpContext.Current = (HttpContext)context;
    var content = TemplateFactory.ReplaceContent(template);
    ReaderWriterLockHelper.WriteToResource(10, () =>
    {
        using (var sw = fileInfo.CreateText())
        {
            sw.WriteLine(content);
            sw.Close();
        }
    });
});
thread.Start(HttpContext.Current);

读取：

ReaderWriterLockHelper.ReadFromResource(10, () => context.Response.WriteFile(url));