我的一个自己写的更新缓存的aop实例
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Contexts;
namespace AopDemo
{
class Program
{
static void Main(string[] args)
{
var tst = new test();
tst.show();
tst.show2();
Console.ReadLine();
}
}
[AutoClearCache("CacheName")]
public class test : ContextBoundObject
{
[AutoClearCacheMethod]
public void show()
{
Console.WriteLine("调用本方法");
}
public void show2()
{
Console.WriteLine("调用方法2");
}
}
public sealed class AutoClearCacheAop : IMessageSink
{
private IMessageSink nextSink; //保存下一个接收器
public AutoClearCacheAop(IMessageSink nextSink, string CacheName)
{
this.CacheName = CacheName;
this.nextSink = nextSink;
}
/// IMessageSink接口方法,用于异步处理,我们不实现异步处理,所以简单返回null,
/// 不管是同步还是异步,这个方法都需要定义
public IMessageCtrl AsyncProcessMessage(IMessage msg, IMessageSink replySink)
{
return null;
}
/// 下一个接收器
public IMessageSink NextSink
{
get { return nextSink; }
}
public IMessage SyncProcessMessage(IMessage msg)
{
IMessage retMsg = null;
IMethodCallMessage call = msg as IMethodCallMessage;
if (call == null || (Attribute.GetCustomAttribute(call.MethodBase, typeof(AutoClearCacheMethodAttribute))) == null)
retMsg = nextSink.SyncProcessMessage(msg);
else
{
Console.WriteLine(this.CacheName);
//传递消息给下一个接收器 - > 就是指执行你自己的方法
retMsg = nextSink.SyncProcessMessage(msg);
Console.WriteLine("拦截方法完");
}
return retMsg;
}
private string CacheName;
}
/// <summary>
/// 标注类某方法内所有数据库操作加入事务控制
/// </summary>
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public sealed class AutoClearCacheAttribute : ContextAttribute, IContributeObjectSink
{
private string CacheName;
/// <summary>
/// 标注类某方法内所有数据库操作加入事务控制,请使用TransactionMethodAttribute同时标注
/// </summary>
public AutoClearCacheAttribute(string CacheName)
: base(CacheName)
{
this.CacheName = CacheName;
}
public IMessageSink GetObjectSink(MarshalByRefObject obj, IMessageSink next)
{
return new AutoClearCacheAop(next, this.CacheName);
}
}
[AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
public sealed class AutoClearCacheMethodAttribute : Attribute
{
}
}