/// <summary>

     /// 日志AOP拦截

     /// </summary>

     [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]

     public class LogInterceptorAttribute : ContextAttribute, IContributeObjectSink

     {

         public LogInterceptorAttribute()

             : base("LogInterceptor")

         { }

         /// <summary>

         /// 实现IContributeObjectSink接口当中的消息接收器接口

         /// </summary>

         /// <param name="obj"></param>

         /// <param name="next"></param>

         /// <returns></returns>

         public IMessageSink GetObjectSink(MarshalByRefObject obj, IMessageSink next)

         {

             return new LogInterceptorHandler(next);

         }

     }

     /// <summary>

     /// 日志拦截操作

     /// </summary>

     public sealed class LogInterceptorHandler : IMessageSink

     {

         //下一个接收器

         private IMessageSink nextSink;

         public IMessageSink NextSink

         {

             get { return nextSink; }

         }

         public LogInterceptorHandler(IMessageSink nextSink)

         {

             this.nextSink = nextSink;

         }

         public IMessage SyncProcessMessage(IMessage msg)

         {

             OnActionExecuted(msg);

             var retMsg = nextSink.SyncProcessMessage(msg);

             OnActionExecuting(retMsg);

             return retMsg;

         }

         public IMessageCtrl AsyncProcessMessage(IMessage msg, IMessageSink replySink)

         {

             return null;

         }

         /// <summary>

         /// 方法执行前

         /// </summary>

         /// <param name="msg"></param>

         private void OnActionExecuted(IMessage msg)

         {

         }

         /// <summary>

         /// 方法执行后

         /// </summary>

         /// <param name="msg"></param>

         private void OnActionExecuting(IMessage msg)

         {

         }

     }