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）。

 

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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：

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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));